WO2021111571A1 - Archery extension bar - Google Patents

Abstract

In order to obtain an archery extension bar that attenuates vibrations transmitted to an anchoring part as a result of impacts caused by vibrations accompanying the recovery of a bow when an arrow has been shot, that reduces distal shake width, and that rapidly stabilizes shaking, an archery extension bar 3 comprises: a supporting part 9 of a prescribed length; an anchoring part 10 which is on one lengthwise end side of the supporting part 9 and anchors to a bow 1; and a mount 11 which is on the other end side of the supporting part 9 and on which a sight 5 is mounted, wherein a small-longitudinal-cross-sectional-area section 13, that has a smaller longitudinal cross-sectional area than that of the anchoring part 10, is formed along the entirety or a portion of the supporting part 9 in the lengthwise direction.

Description

Extension bar for archery

The present invention relates to an archery extension bar for arranging an archery sight at a position extending forward from the bow body.

In archery competitions, the sight should be placed at a predetermined distance from the shooter's eyes and extended forward from the bow to allow the shooter to aim accurately. A sighting device is attached to the tip of an extension bar fixed to the above (see, for example, Patent Document 1).

Since the extension bar fixed to the bow part vibrates due to the impact of the vibration caused by the restoration of the bow part when the arrow is shot, the sighting device attached to the tip of the extension bar also receives vibration.
The sight is composed of multiple parts, and when it receives strong vibration, the parts that make up the sight may loosen, making it difficult to reproduce the exact position of the sight. It was. In addition, loosening of the parts that make up the sight creates a gap between the parts, and if strong vibration is applied, the parts may rub against each other or collide with each other, causing abnormal noise, resulting in high concentration. There was a problem that it would put a great deal of stress on the shooter who needed it.

Conventionally, as a means for solving such a problem, a vibration absorber made of an elastic material formed in a tubular shape is fitted on the outer periphery of the extension bar, and the vibration absorber absorbs the vibration of the extension bar to absorb the vibration of the extension bar. The vibration is attenuated and the vibration transmitted to the sight is reduced.

JP-A-2007-315746

However, the above-mentioned means for reducing the vibration of the extension bar is such that the vibration of the extension bar is absorbed by the vibration absorber. Therefore, in order to improve the vibration absorption effect, the vibration absorber must be thickened. As a result, there is a problem that it may be annoying to the shooter, and if the thickness of the vibration absorber is reduced to avoid the obstruction of the shooter, the annoyance of the shooter is alleviated, but a satisfactory vibration absorption effect cannot be obtained. There is a problem such as.
Further, there are problems that the vibration absorber must be prepared at all times and that the troublesome work such as fitting the vibration absorber to the extension bar is forced.

As a result of repeated test and research to solve such a problem, the present inventor has focused on solving the problem by the shape of the extension bar itself, and has come up with the present invention.

An object of the present invention is to provide an extension bar for archery having a function of attenuating vibration received by restoration of a bow portion when an arrow is shot.

In order to achieve the above object, the invention according to claim 1 includes a support portion having a predetermined length, a fixing portion fixed to an arch portion on one end side in the longitudinal direction of the support portion, and other than the support portion. An archery extension bar having a mounting portion for attaching a sighting device on the end side, and having a small vertical cross-sectional area having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion over the entire or part of the longitudinal direction of the support portion. It is characterized by being formed.

According to the invention of claim 1, since a small vertical cross-sectional area having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion is formed in the entire or part of the longitudinal direction of the support portion, a bow is formed when an arrow is shot. The vibration transmitted to the fixed portion due to the impact when the portion is restored is dampened by the small vertical cross-sectional area portion of the support portion, the swing width of the tip can be reduced, and the swing can be quickly settled. .. As a result, the vibration received by the sighting device is also reduced, loosening or misalignment between the parts constituting the sighting device can be prevented, and the accurate reproduction of the position of the sighting device can be facilitated. Further, since the loosening of the parts constituting the sighting device is prevented, it is possible to suppress the generation of abnormal noise due to rubbing or collision between the parts.

The invention according to claim 2 is characterized in that the small vertical cross-sectional area according to claim 1 is formed with a gradual reduction portion in which the vertical cross-sectional area gradually decreases from the fixed portion side to the mounting portion side. And.

According to the second aspect of the present invention, the small vertical cross-sectional area portion is formed with a gradual reduction portion in which the vertical cross-sectional area gradually decreases from the fixed portion side to the mounting portion side. The longitudinal cross-sectional area can be gradually reduced toward the tip, and vibration can be effectively damped.

In the invention according to claim 3, the support portion, the fixing portion, and the attachment portion according to any one of claims 1 or 2 are integrally formed of a long plate-shaped member. The small vertical cross-sectional area portion is characterized in that it is formed by making the entire vertical width of the support portion or a part of the vertical vertical width of the support portion shorter than the vertical vertical width of the fixed portion.

According to the invention of claim 3, the support portion, the fixing portion, and the mounting portion are integrally formed of a long plate-shaped member, and the small vertical cross-sectional area portion is formed in the longitudinal direction of the support portion. Since the entire or part of the vertical vertical width in the vertical direction is made shorter than the vertical vertical width of the fixed portion, the small vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion can be easily formed on the support portion. Can be formed.

In the invention according to claim 4, the support portion, the fixing portion, and the attachment portion according to any one of claims 1 or 2 are integrally formed on a long plate-shaped member. The small vertical cross-sectional area has a vertical width in the entire longitudinal direction or a part of the support portion shorter than the vertical width in the vertical direction of the fixed portion, and a thickness in the entire longitudinal direction or a part of the support portion. It is characterized in that it is formed by making the width in the direction shorter than the width in the thickness direction of the fixed portion.

According to the invention of claim 4, the support portion, the fixing portion, and the mounting portion are integrally formed on a long plate-shaped member, and the small vertical cross-sectional area is formed in the longitudinal direction of the support portion. The entire or part of the vertical width in the vertical direction is shorter than the vertical width of the fixed portion, and the entire length or part of the vertical width of the support portion in the thickness direction is the width in the thickness direction of the fixed portion. Since it is formed by making the width shorter, it is possible to more easily form the small vertical cross-sectional area portion smaller than the cross-sectional area of the fixed portion on the support portion.

The invention according to claim 5 is the plate-shaped member according to any one of claims 3 or 4, wherein the length in the longitudinal direction is the length of the fixing portion, the supporting portion, and the mounting portion. A substantially rectangular main member formed to have a corresponding length, and a length longer than the vertical vertical width of the main member and a length in the longitudinal direction is longer than a length corresponding to the length of the fixed portion and the support portion. It is also characterized in that it is composed of a substantially rectangular sub-member formed shortly, and is formed by fixing the sub-member to one end of the main member.

According to the invention of claim 5, the plate-shaped member has a substantially rectangular shape having a length in the longitudinal direction corresponding to the length of the fixing portion, the supporting portion, and the mounting portion. A main member and a substantially rectangular sub-member formed having a length longer than the vertical vertical width of the main member and a length in the longitudinal direction shorter than a length corresponding to the length of the fixed portion and the support portion. Since the sub-member is fixed to one end of the main member, the fixed portion and the small vertical cross-sectional area having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion are formed. The support portion and the extension bar provided with the mounting portion can be easily manufactured by fixing a plurality of substantially rectangular members that are relatively easy to mold.

According to the extension bar for archery according to the present invention, the vibration transmitted to the fixed portion due to the impact due to the vibration accompanying the restoration of the bow portion when the arrow is shot is damped by the small vertical cross-sectional area portion of the support portion, and the tip sways. The width can be reduced and the shaking can be quickly settled. This reduces the vibration received by the sight, prevents loosening and misalignment between the parts that make up the sight, and makes it easy and reliable to accurately reproduce the position of the sight. .. In addition, since the parts that make up the sight are prevented from loosening, it is possible to suppress the generation of abnormal noise due to rubbing and collision between parts, making it suitable for shooters due to abnormal noise in archery competitions that require high concentration. The stress given can be relieved.
In addition, since it does not require a shock absorber as in the past, there is no problem such as annoying the shooter, and the troublesomeness of having to always prepare a shock absorber and the extension bar The shooter can be freed from the troublesome work of fitting the shock absorber.

It is an overall explanatory view of the archery bow which shows the state which attached the sighting device to the extension bar for archery fixed to the arch part through the fixing member. It is explanatory drawing which shows the extension bar which attached the fixing member and a sighting device shown in FIG. It is a side view which shows the 1st example of the Embodiment of the extension bar for archery which concerns on this invention. It is a top view of the extension bar shown in FIG. It is a side view which shows the other example of the support part of the extension bar of 1st example. It is a side view which shows the other example of the support part of the extension bar of 1st example. It is a side view which shows the other example of the support part of the extension bar of 1st example. It is a side view which shows the other example of the support part of the extension bar of 1st example. It is a perspective view which shows the 2nd example of the embodiment of the extension bar for archery which concerns on this invention. It is a top view of the extension bar shown in FIG. It is a perspective view which shows the 3rd example of the embodiment of the extension bar for archery which concerns on this invention. It is an exploded explanatory view of the extension bar shown in FIG.

Hereinafter, a first example of the embodiment of the extension bar for archery according to the present invention will be described in detail with reference to the drawings.
1 to 8 show a first example of the embodiment of the archery extension bar according to the present invention, and FIG. 1 shows a state in which an aiming device is attached to an archery extension bar fixed to an arch portion via a fixing member. An overall explanatory view of the archery bow shown, FIG. 2 is an explanatory view showing an extension bar to which the fixing member and the sighting device shown in FIG. 1 are attached, and FIG. 3 is a first example of an embodiment of the archery extension bar according to the present invention. 4 is a plan view of the extension bar shown in FIG. 3, and FIGS. 5, 6, 7, and 8 are side views showing another example of the support portion of the extension bar of the first example.

As shown in FIG. 1, the archery bow tool is composed of a bow portion 1 and strings 2. The bow portion 1 is provided with an extension bar 3 extending forward from the bow portion 1. One end of the extension bar 3 is fixed to the bow portion 1 via the fixing member 4, and the sighting device 5 is attached to the other end.
As shown in FIG. 2, the extension bar 3 has a fixing member 4 attached to one end thereof and a sighting device 5 attached to the other end thereof.
The fixing member 4 is a plate-shaped or tubular member, and includes a mounting mechanism for detachably attaching to the extension bar 3 and a fixing mechanism for fixing to the bow portion. In this example, as a mounting mechanism, a screw S for screwing the extension bar 3 to the fixing member 4 and a through hole (not shown) are provided. Further, as a fixing mechanism, a through hole H for being screwed to the bow portion 1 is formed.
The sighting device 5 is composed of a sighting device main body 6 provided with a sighting pin and an elevation bar 7 for supporting the sighting device main body 6 so as to be movable and adjustable in the vertical direction, and the extension bar 3 is provided via a mounting member 8. Attach to.

The extension bar 3 of the first example according to the present invention is made of a long member, and has a support portion 9 having a predetermined length, a fixing portion 10 fixed to the bow portion 1 on one end side in the longitudinal direction of the support portion 9, and a support portion 10. A mounting portion 11 for mounting the sighting device 5 is provided on the other end side of the portion 9. Further, in the first example, the support portion 9, the fixing portion 10, and the mounting portion 11 are integrally formed of a long plate-shaped member 12, and are specially formed between the support portion 9, the fixing portion 10, and the mounting portion 11. There is no partition.
As the material of the extension bar 3, a known material used for the extension bar 3 can be used, and for example, aluminum or carbon fiber is used.

The support portion 9 forms a small vertical cross-sectional area 13 having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion 10 in the entire or part of the longitudinal direction thereof. In the first example, the small vertical cross-sectional area portion 13 is formed by making the vertical vertical width of the support portion 9 shorter than the vertical vertical width of the fixed portion 10.

In the support portion 9 of the first example, the starting point 13a of the small vertical cross-sectional area portion 13 where the formation of the small vertical cross-sectional area portion 13 is started coincides with the fixed portion side end portion 14 of the support portion 9, and the small vertical cross-sectional area portion 13 The end point 13b of the small vertical cross-sectional area portion where the formation is completed coincides with the end portion 15 on the side of the mounting portion. The formation range of the small vertical cross-sectional area 13 is not particularly limited and is not limited to the range of the first example, but the small vertical cross-sectional area 13 is arranged as close to the tip side as possible in order to effectively attenuate the vibration. In addition, the end point 13b of the small vertical cross-sectional area portion is preferably formed at a position near the mounting portion side end portion 15, and more preferably formed so as to coincide with the mounting portion side end portion 15.

Further, the small vertical cross-sectional area 13 of the first example is formed with a gradual reduction portion 16 in which the vertical cross-sectional area gradually decreases from the fixed portion 10 side toward the mounting portion 11.
The gradually reducing portion 16 of the first example is formed by forming a tapered shape in which the upper side and the lower side are inclined inward and the vertical width in the vertical direction is gradually shortened. The formation position and range of the gradual reduction portion 16 are not particularly limited, but in the first example, the gradual reduction portion starting point 16a at which the formation of the gradual reduction portion 16 is started coincides with the small vertical cross-sectional area portion starting point 13a, and the gradual reduction portion 16 The end point 16b of the gradually reduced portion and the end point 13b of the small vertical cross-sectional area are formed so as to coincide with each other. The shape of the small vertical cross-sectional area 13 is not particularly limited as long as the vertical cross-sectional area is smaller than the vertical cross-sectional area of the fixed portion 10, but if the gradually reducing portion 16 is formed as in the first example, the vertical cross section of the support portion 9 is formed. Since the area can be gradually reduced toward the tip, vibration can be effectively damped. Further, since the gradually reducing portion 16 of the first example is formed by inclining the upper side and the lower side inward, the vertical cross-sectional area of the supporting portion 9 can be gradually reduced toward the tip, and the vibration is damped. Can be done more effectively.

Further, in the first example, the minimum vertical cross-sectional area 13c that minimizes the vertical cross-sectional area is formed so as to coincide with the end point 13b of the small vertical cross-sectional area. The formation position of the minimum vertical cross-sectional area 13c is not particularly limited, but in order to effectively attenuate the vibration, it is formed at a position near the end point 13b of the small vertical cross-sectional area so as to be as close to the tip as possible. It is desirable to do.
Further, in the first example, the minimum longitudinal cross-sectional area 13c does not have a width in the longitudinal direction, but the present invention is not limited to this, and the minimum longitudinal cross-sectional area 13c may be formed so as to have a width in the longitudinal direction.

Here, a modified example of the support portion 9 of the first example will be described with reference to FIGS. 5 to 8.
In the support portion 9 shown in FIG. 5, unlike the support portion 9 shown in FIG. 3, the starting point 13a of the small vertical cross-sectional area portion 13 of the small vertical cross-sectional area portion 13 is located closer to the mounting portion 11 than the fixed portion side end portion 14 of the support portion 9. Further, the vertical width of the fixed portion side end portion 14 in the vertical direction is wider than the vertical width of the fixed portion 10, and the portion of the support portion 9 on the fixed portion 10 side of the small vertical cross-sectional area 13 is the fixed portion 10. It is larger than the vertical cross-sectional area of.
As described above, the support portion 9 may have a vertical cross-sectional area larger than the vertical cross-sectional area of the fixed portion 10 in a part thereof.

The support portion 9 shown in FIG. 6 is different from the support portion 9 shown in FIG. 3 in that the gradually reducing portion 16 is formed in a stepped shape in which the upper side and the lower side are inward from the fixed portion 10 side toward the mounting portion 11. The gradual reduction portion 16 is formed by gradually reducing the vertical width in the vertical direction.
As described above, the shape of the gradually reducing portion 16 may be any shape as long as the vertical cross-sectional area is gradually reduced from the fixing portion 10 side to the mounting portion 11 side, and the shape is not particularly limited.

Unlike the support portion 9 shown in FIG. 3, the support portion 9 shown in FIG. 7 does not form a gradual reduction portion 16, and the vertical cross-sectional area of the small vertical cross-sectional area 13 is a longitudinal section of the fixed portion 10 at the starting point 13a of the small vertical cross-sectional area. It is formed so as to be smaller than the area. Further, the upper side and the lower side are parallel to each other to form the small vertical cross-sectional area portion 13, and the entire area in the longitudinal direction from the starting point 13a of the small vertical cross-sectional area portion to the end point 13b of the small vertical cross-sectional area portion is formed to be the minimum vertical cross-sectional area portion 13c. There is.
As described above, the support portion 9 does not have to form the gradually reducing portion 16, and the entire longitudinal direction of the small vertical cross-sectional area 13 may be the minimum vertical cross-sectional area 13c.

Unlike the support portion 9 shown in FIG. 3, the support portion 9 shown in FIG. 8 is formed with a protruding small vertical cross-sectional area 13d that does not exceed the vertical vertical width of the fixed portion 10 in the small vertical cross-sectional area 13. ..
As described above, in the small vertical cross-sectional area portion 13, a portion where the vertical cross-sectional area increases toward the tip may be formed.

The ratio of the vertical cross-sectional area of the minimum vertical cross-sectional area 13c to the vertical cross-sectional area of the fixed portion 10 in the small vertical cross-sectional area 13 formed on the support portion 9 is the material forming the extension bar 3, the length in the longitudinal direction of the extension bar 3. It is determined by the size of the vertical cross-sectional area of the fixed portion 10, the shape of the support portion 9, the formation position and range of the small vertical cross-sectional area 13, the presence or absence of the gradually reducing portion 16, the formation position and range, and the like, and is vibrated by the small vertical cross-sectional area 13. Is not particularly limited as long as it can sufficiently attenuate the vibration, but even when the vertical area of the minimum vertical cross-sectional area 13c is reduced to 95% of the vertical cross-sectional area of the fixed portion 10, about 14% vibration damping is observed, which is a slight reduction. It may be.

Further, in the first example, a positioning screw hole 17 is formed in the fixing portion 10. The positioning screw hole 17 is formed in a shape corresponding to the screw S which is the mounting mechanism of the extension bar 3 provided in the fixing member 4, and the screw S through which the through hole of the fixing member 4 is penetrated and the positioning screw hole 17 are formed. By screwing, the extension bar 3 is screwed to the fixing member 4. A plurality of positioning screw holes 17 formed in the fixing portion 10 are formed in the longitudinal direction of the fixing portion 10, and when fixing the fixing portion 10, the bow portion is formed by selecting one of the positioning screw holes 17. The distance from 1 to the sight 5 can be adjusted.
The extension bar 3 may be attached to the fixing member 4 by a method other than screwing as long as the extension bar 3 can be securely fixed to the fixing member 4. For example, the fixing member 4 is formed in a cylinder to form the fixing member. A screw hole into which the screw S is screwed is formed in place of the through hole, a positioning recess is formed in place of the positioning screw hole 17 of the fixing portion 10 of the extension bar 3, and the screw S is formed in the screw hole of the fixing member 4. Is screwed in, and the tip thereof is fitted into the positioning recess to determine the mounting position of the extension bar 3, and the extension bar 3 is pressed against the fixing member 4 by pressing the extension bar 3 with the tip of the screw S. It may be attached to the fixing member 4.

Further, in the first example, a mounting screw hole 18 for screwing the mounting member 8 and the mounting portion 11 is formed in the mounting portion 11. The attachment of the sighting device 5 to the attachment portion 11 is not limited to screwing, and other methods may be used.

According to the extension bar 3 of the first example configured in this way, a small vertical cross-sectional area 13 having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion 10 is formed in the entire or part of the longitudinal direction of the support portion 9. Therefore, the vibration transmitted to the fixed portion 10 due to the impact when the bow portion 1 is restored when the arrow is shot is damped by the small vertical cross-sectional area portion 13 of the support portion 9, and the swing width of the tip is reduced. , The shaking can be settled quickly. As a result, the vibration received by the sighting device 5 is also reduced, loosening and misalignment between the parts constituting the sighting device 5 can be prevented, and the accurate reproduction of the position of the sighting device 5 is easily and surely ensured. be able to. Further, since the loosening of the parts constituting the sighting device 5 is prevented, it is possible to suppress the generation of abnormal noise due to rubbing or collision between the parts.

Further, since the small vertical cross-sectional area 13 is formed with a gradual reduction portion 16 in which the vertical cross-sectional area gradually decreases from the fixed portion 10 side toward the mounting portion 11, the vertical cross-sectional area of the support portion 9 is directed toward the tip. Therefore, it can be gradually reduced, and the vibration can be effectively damped.

Further, the support portion 9, the fixing portion 10, and the mounting portion 11 are integrally formed by a long plate-shaped member 12, and the small vertical cross-sectional area portion 13 is set to the vertical width of the support portion 9 in the vertical direction. Since the width is shorter than the vertical width in the direction, the small vertical cross-sectional area 13 having a smaller vertical cross-sectional area than the vertical cross-sectional area of the fixed portion 10 can be easily formed on the support portion 9.

9 and 10 show a second example of the embodiment of the archery extension bar according to the present invention, FIG. 9 is a perspective view showing the archery extension bar of the second example, and FIG. 10 shows the extension bar shown in FIG. It is a plan view of.
The extension bar 3 of the second example has the same basic configuration as the extension bar 3 of the first example, and the same configuration as that of the first example will be described with the same reference numerals.

The main difference between the second example and the first example is the configuration of the small vertical cross-sectional area 13 having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion 10 formed in the entire or part of the longitudinal direction of the support portion 9. ..
In the second example, in the small vertical cross-sectional area portion 13, the vertical vertical width of the support portion 9 is made shorter than the vertical vertical width of the fixed portion 10 and the thickness of the support portion 9 is set as in the first example. It is formed by making the width in the direction shorter than the width in the thickness direction of the fixed portion 10.
Since other configurations are the same as those of the first example, the description of the first example is incorporated and omitted.

According to the extension bar 3 of the second example configured in this way, a small vertical cross-sectional area portion 13 smaller than the cross-sectional area of the fixed portion 10 can be more easily formed on the support portion 9.
Since other effects are the same as in the first example, the description of the first example is incorporated and omitted.

11 and 12 show a third example of the embodiment of the archery extension bar according to the present invention, FIG. 11 is a perspective view showing the archery extension bar of the third example, and FIG. 12 shows the extension bar shown in FIG. It is an exploded explanatory view of.

The extension bar 3 of the third example has the same basic configuration as the extension bar 3 of the first example, and the same configuration as that of the first example will be described with the same reference numerals.

The main difference between the third example and the first example is the configuration of the plate-shaped member 12 that integrally forms the support portion 9, the fixing portion 10, and the mounting portion 11.
In the third example, the plate-shaped member 12 has a substantially rectangular main member 12a formed with a length in the longitudinal direction corresponding to the lengths of the support portion 9, the fixing portion 10, and the mounting portion 11, and the main member. It is composed of a substantially rectangular sub-member 12b which is longer than the vertical width of 12a and whose length in the longitudinal direction is shorter than the length of the fixed portion 10 and the length corresponding to the length of the support portion 9. It is formed by fixing the sub-member 12b to one end of the main member 12a corresponding to the fixing portion of the extension bar 3.
By forming the plate-shaped member 12 in this way, the fixing portion 10, the support portion 9 in which the small vertical cross-sectional area 13 having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixing portion 10 is formed, and the mounting portion 11 are provided. The extension bar 3 is formed.

The length of the auxiliary member 12b in the longitudinal direction is not particularly limited as long as the fixing portion 10 and the support portion 9 in which the small vertical cross-sectional area portion 13 is formed can be formed, but in the third example, the length in the longitudinal direction of the auxiliary member 12b is limited. The length of the sub-member 12b is set to be longer than the length corresponding to the fixed portion 10, and the auxiliary member 12b constitutes a part of the support portion 9.
Further, the auxiliary member 12b of the third example forms a gradual short width portion 19 at the other end thereof, in which the vertical width in the vertical direction gradually becomes shorter. As a result, the extension bar 3 is formed with a gradually reduced portion 16.

In the third example, the plate-shaped member 12 is formed by fixing one sub-member 12b to the main member 12a, but even if there are two or more sub-members 12b fixed to the main member 12a. Good. For example, the plate-shaped member 12 may be formed by sandwiching the main member 12a between the two sub-members 12b and fixing the sub-member 12b to the main member 12a.
Further, in the third example, the main member 12a and the sub-member 12b are fixed by using an adhesive, but the fixing between the main member 12a and the sub-member 12b is not limited to this, for example. The member 12a and the sub-member 12b can also be fixed by screwing them together with screws.

According to the extension bar 3 of the third example configured in this way, the fixing portion 10 and the supporting portion 9 on which the small vertical cross-sectional area 13 having the vertical cross-sectional area smaller than the vertical cross-sectional area of the fixing portion 10 is formed are attached. The extension bar 3 provided with the portion 11 can be easily manufactured by fixing a plurality of substantially rectangular members that are relatively easy to mold.
Since other configurations and effects are the same as those of the first example, the first example will be incorporated and the description thereof will be omitted.

1 Bow 2 Strings 3 Extension bar 4 Fixing member 5 Sighting device 6 Sighting device body 7 Elevation bar 8 Mounting member 9 Supporting part 10 Fixing part 11 Mounting part 12 Plate-shaped member 12a Main member 12b Sub-member 13 Small vertical cross-sectional area 13a Small vertical cross-sectional area starting point 13b Small vertical cross-sectional area ending point 13c Minimum vertical cross-sectional area 13d Protruding small vertical cross-sectional area 14 Fixed part side end 15 Mounting part side end 16 Gradually reduced part 16a Gradually reduced part starting point 16b Gradually reduced part end point 17 Positioning screw hole 18 Mounting screw hole 19 Gradually short width part S screw H through hole

Claims (5)

An archery extension bar having a support portion of a predetermined length, a fixing portion fixed to a bow portion on one end side in the longitudinal direction of the support portion, and a mounting portion for attaching a sight on the other end side of the support portion. hand,
An extension bar for archery, characterized in that a small vertical cross-sectional area having a vertical cross-sectional area smaller than the vertical cross-sectional area of the fixed portion is formed in the entire or part of the longitudinal direction of the support portion. The extension bar for archery according to claim 1, wherein the small vertical cross-sectional area portion is formed with a gradual reduction portion in which the vertical cross-sectional area gradually decreases from the fixed portion side to the mounting portion side. The support portion, the fixing portion, and the mounting portion are integrally formed of a long plate-shaped member.
Claim 1 or 2 is characterized in that the small vertical cross-sectional area portion is formed by making the entire vertical width of the support portion or a part of the vertical vertical width in the vertical direction shorter than the vertical vertical width of the fixed portion. Extension bar for archery described in. The support portion, the fixing portion, and the mounting portion are integrally formed on a long plate-shaped member.
The small vertical cross-sectional area has a vertical width in the entire longitudinal direction or a part of the support portion shorter than the vertical width in the vertical direction of the fixed portion, and the thickness of the entire length or a part of the support portion in the longitudinal direction. The extension bar for archery according to claim 1 or 2, wherein the horizontal width in the vertical direction is made shorter than the horizontal width in the thickness direction of the fixed portion. The plate-shaped member includes a substantially rectangular main member whose length in the longitudinal direction corresponds to the length of the fixed portion, the support portion, and the mounting portion, and the vertical length of the main member. It is composed of a substantially rectangular sub-member having a width longer than the width and a length in the longitudinal direction shorter than the length corresponding to the length of the fixing portion and the supporting portion, and the one end portion of the main member is covered with the above. The extension bar for archery according to claim 3 or 4, wherein the extension bar is formed by fixing an auxiliary member.

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