TWM650358U - Improved positioning mechanism of wrench direction button - Google Patents

Abstract

A wrench has a directional buttonhole connected to a wide section in the middle of a gear slot, and the wide section extends a tapered narrow section to both ends of the gear slot. A gear tooth is inserted into the gear groove, and the gear tooth moves through the wide section to one of the two narrow sections. A direction button is installed on the direction button hole so as to be rotatable. The direction button forms a through hole, and the two ends of the through hole face the wide section and the wall of the direction button hole respectively. The two azimuth holes are directly or indirectly located at the directional buttonholes and are spaced apart from each other. A latch, a spring and a steel ball are jointly installed in the through hole. One end of the spring pushes the latch, extends into any narrow section and resists the toothing. The other end of the spring drives the steel ball to catch one of the two azimuth holes, preventing the gear from changing the position of the latch and enhancing the positioning function.

Description

Improved positioning mechanism of wrench direction button

This creation relates to the field of tools, specifically a wrench, which improves the positioning mechanism of a direction button.

In Figure 8, a known wrench 80 is configured with a direction button 81, a gear 85 and a ratchet 86. A spring 83 and a latch 84 are inserted into a latch groove 82 of the direction button 81. The spring 83 pushes the latch 84 to deflect against the gear 85, causing the gear 85 to bite the ratchet 86 and resist. The wall of the wrench 80.

The wrench 80 receives an external force and rotates along a force application direction 87 . The wall of the wrench 80 transmits a torque to the tooth 85 . In the engaged condition, the ratchet wheel 86 rotates in a locking direction 88 . The locking direction 88 is the same as the force application direction 87 , and the wrench 80 drives a workpiece (not shown, such as a screw, nut or rod) to perform a locking operation.

As shown in Figure 9, when the workpiece is locked, the ratchet 86 usually does not rotate. At this moment, the wrench 80 is forced to rotate in an opposite direction 89 and no torque is transmitted to the gear 85 . Under the bite condition, an acting force 90 of the gear teeth 85 is transmitted to the latch 84, and together with the spring 83, it retreats into the latch groove 82, causing the entire direction button 81 to rotate to another angle, changing the said latch 84 without warning. The direction in which the wrench 80 transmits torque.

Therefore, how to provide the direction button with a positioning mechanism has become an issue that needs to be improved urgently in this creation.

In view of this, the author of this case proposes a positioning mechanism suitable for the direction button of the wrench. The main purpose is to use the concept of concave-convex fit to create a positioning mechanism for the spherical snap hole, and to improve the shortcomings of the previous technology regarding the arbitrary change of orientation of the direction button.

Due to the achievement of the above purpose, the present invention provides a wrench with a directional buttonhole connected to a wide section in the middle of a gear groove, and the wide section extends to the two ends of the gear groove with a tapered narrow section. part. A gear tooth is inserted into the gear groove, and the gear tooth moves through the wide section to one of the two narrow sections. A direction button is installed on the direction button hole so as to be rotatable. The direction button forms a through hole, and the two ends of the through hole face the wide section and the wall of the direction button hole respectively. The two azimuth holes are directly or indirectly located at the directional buttonholes and are spaced apart from each other. A latch, a spring and a steel ball are jointly installed in the through hole. One end of the spring pushes the latch, extends into any narrow section and resists the toothing. The other end of the spring drives the steel ball to catch one of the two azimuth holes, preventing the gear from changing the position of the latch and enhancing the positioning function.

Wherein, two of the azimuth holes are formed in a bushing, and the bushing is provided between the wall of the direction button hole and the direction button.

In terms of combination, the bushing has a raised portion that can be inserted into a restriction hole at the bottom of the direction button hole so that the bushing cannot rotate relative to the wrench. Moreover, the direction button prevents the bushing from leaving the direction button hole of the wrench, and the latch partially extends out of the direction button and blocks the wall of the wide section to prevent the direction button from falling off.

In order to make the purpose, features and advantages of this invention easy to understand, one or more preferred embodiments are described in detail below with reference to the attached drawings.

"Prior Technology"

80: Wrench

81: Direction button

82:Latch slot

83:Spring

84:Latch

85: Gear making

86:ratchet

87: Force application direction

88: Locking direction

89:Opposite direction

90:Action force

"This Creation"

10: Wrench

11: handle body

12:Head

13: Ratchet Chamber

14: Groove

15: round hole

16: Gear groove

17: Narrow section

18: Broad section

19: Direction buttonhole

20:Switch slot

21: Restriction hole

22: Bushing

23: Concave surface

24: Convex surface

25, 26: Azimuth hole

27:convex part

30: Direction button

31: Lever

32:Through hole

33, 36:Latch

34:Spring

35:Steel balls

40: Gear making

41: Engagement part

42: Groove

50:ratchet

51: Upper cylindrical section

52: Lower cylindrical section

53: Teeth

54:Drive Department

55:Fasteners

56: Ring body

Figure 1 depicts a partially exploded view of the first embodiment of the wrench of the present invention.

Figure 2 shows the assembled internal structure of the first embodiment of the wrench.

Figure 3 shows a section of the first embodiment of the wrench from another angle and observes the assembled internal structure.

Figure 4 shows the corresponding relationship between the direction button and the wrench of the switching action.

Figure 5 draws the internal structure of the wrench in Figure 4 from another angle.

Figure 6 depicts the direction button changing its angle relative to the wrench to complete the switching action.

Figure 7 depicts the assembled internal structure of the second embodiment of the wrench of the present invention.

Figure 8 depicts prior art utilizing a wrench to perform the locking operation.

Figure 9 shows the action of the prior art regarding reverse idling of the wrench.

Next, embodiments of the present case will be described with reference to the drawings. In the drawings, the same reference numerals are used to represent the same or similar structures or units. It is foreseeable that the described embodiments are only some examples of this case, not all the embodiments. Based on the above example, other embodiments can be deduced, or the structure can be modified or changed as necessary, which all fall within the scope of protection of this case.

In the following description, directional terms such as "upper", "lower", "left", "right", "front", "rear", "inside", "outside" and "side" only refer to the direction of the drawings. . The use of directional terms is for a better and clearer description and understanding of this case. It does not express or imply that the devices or components described must have specific orientations, structures, and operations, and therefore cannot be understood as limiting the technical content of this case.

Unless there are specific and clear specifications and limitations, in the following description, "installed", "connected", "connected" or "located on" should be understood in a broad sense, such as fixed connection, detachable connection, integral connection, mechanical connection , directly connected, indirectly connected or internally connected between two components. For those skilled in the field of this case, they can understand the specific meaning of the above terms in each embodiment and even this case based on common knowledge or experience.

Unless otherwise stated, in the following description, "plurality" means two or more.

In Figure 1, a first embodiment of a wrench 10 of the present invention is shown, which has a handle body 11. In this embodiment, the handle body 11 is of solid design, and one end thereof is connected to a head 12 . A ratchet chamber 13 is formed inside the head 12 . Along the direction from the head 12 to the handle body 11, the ratchet chamber 13 passes through a toothing groove 16 and is connected to a switching groove 20 through a direction button hole 19. A circular hole 15 of the head 12 is vertically connected to the ratchet chamber 13 .

As shown in Figures 2 and 5, a ratchet 50 is placed in the ratchet chamber 13. A plurality of teeth 53 are raised on the outside of the ratchet wheel 50 in the circumferential direction, and each of the teeth 53 passes through the gear groove 16 in sequence. An upper cylindrical section 51 protrudes from one side of the ratchet wheel 50 and extends into the circular hole 15 , and a lower cylindrical section 52 extends from the other side and is inserted into a ring body 56 . A fastener 55 is inserted into the ring body 56 and an inlay groove 14 of the ratchet chamber 13 to allow the ratchet wheel 50 to rotate relative to the head 12 but not disengage from the ratchet chamber 13 .

As shown in Figures 2 and 3, the toothing groove 16 extends from a wide section 18 in the middle to a tapering narrow section 17 at both ends. The tooth groove 16 is like the volume of a crescent, receiving a small tooth 40 . The tooth 40 is inserted into the tooth groove 16 and can move from one of the two narrow sections 17 to the other narrow section 17 via the wide section 18 . The front side of the gear 40 forms a meshing portion 41 and the back side is sunk into a groove 42 . The engaging portion 41 is composed of a plurality of continuous teeth and can engage any tooth 53 of the ratchet 50 .

It is easy to understand from Figures 1 to 3 that a direction button 30 is installed in the direction button hole 19 and can rotate relative to the head 12 . The direction button 30 extends along a radial direction with a lever 31 lying on one side of the switching slot 20 to operate the direction of rotation of the direction button 30 . The direction button 30 forms a through hole 32 deep into the direction button hole 19 . One end of the through hole 32 faces the wide section 18 and the other end faces the wall of the direction button hole 19 .

A latch 33, a spring 34 and a steel ball 35 are jointly inserted into the through hole 32. One end of the spring 34 drives the steel ball 35 close to the wall of the directional buttonhole 19, and the other end pushes the latch 33, extends into one of the narrow sections 17 and resists the teeth 40, so that the engaging portion 41 bites The teeth 53 of the ratchet wheel 50 are shown.

Secondly, the two azimuth holes are spaced apart from each other and are directly or indirectly located in the direction button hole 19 .

Direct here means that the wall of the direction button hole 19 forms two azimuth holes, so that the azimuth holes face the through hole 32 of the direction button 30 .

What is referred to here as indirect means that the two azimuth holes are formed in a bushing, and the bushing is inserted between the wall of the direction button hole 19 and the direction button 30, so that the azimuth hole is indirectly located on the direction button. hole 19 and faces the through hole 32 .

In this embodiment, an indirect method is used. The steel ball 35 engages the corresponding azimuth hole 26 and is combined into a positioning mechanism to prevent the gear 40 from changing the position of the latch 33 .

Furthermore, the latch 33 partially extends out of the direction button 30 and blocks the wall of the wide section 18 (refer to Figures 4 and 5) to prevent the direction button 30 from falling off due to vibration. The lever 31 (or the exposed layer of the direction button 30 ) prevents the bushing 22 from leaving the direction button hole 19 . The bottom surface of the bushing 22 has a raised portion 27, which can be inserted into a restriction hole 21 at the bottom of the direction button hole 19, so that the bushing 22 cannot move relative to the head 12 (or wrench 10). Inside the bushing 22 A concave curved surface 23 on the side fits the protruding curved surface of the direction button 30; a convex curved surface 24 on the outside of the bushing 22 fits the concave curved surface of the direction button hole 19, so the bushing 22 does not affect the direction button hole 19. The direction button 30 rotates in the direction button hole 19 .

When in use, a driving part 54 of the ratchet 50 is a plum blossom hole (or special-shaped hole), extending from the upper cylindrical section 51 to the lower cylindrical section 52, and can cover a screw, bolt, nut or connector such as a screw, a bolt, a nut or a joint. The workpiece of the rod (not shown). In the counterclockwise direction (see Figure 3), the torque of the handle body 11 is output to the gear making 40 through the head 12, driving the ratchet 50 to rotate together with the workpiece to perform the unscrewing operation.

As shown in Figures 2, 4, and 5, the lever 31 is forced to drive the direction button 30 to rotate in the clockwise direction to release the locking relationship between the steel ball 35 and the azimuth hole 26. The latch 33 resists the groove 42, causing the tooth 40 to leave the original narrow section 17 and move to the wide section 18 of the tooth groove 16. The steel ball 35 rollingly contacts the concave curved surface 23 of the bushing 22, making the switching action of the direction button 30 smoother.

In Figure 6, the steel ball 35 locks the corresponding azimuth hole 25 to complete the switching operation of the direction button 30. At this moment, the spring 34 pushes the latch 33 to deflect to another narrow section 17 and resists the other side of the groove 42 of the gear teeth 40 so that the engaging portion 41 continues to bite the corresponding teeth 53 and engages with the ratchet 50 Stay connected.

Along the clockwise direction, the torque of the handle body 11 is output to the gear making 40 through the head 12, driving the ratchet 50 to rotate together with the workpiece to perform the locking operation. The steel ball 35 positions the bushing 22 and prevents the gear 40 from driving the pin 33 when the wrench 10 is reversed, thereby enhancing the positioning function.

In this embodiment, the latch 33 may be a hollow inner shell that receives a local spring 34 .

In some embodiments, the latch 36 (see Figure 7) may be a multi-step cylinder of different diameters, with smaller diameter sections of the cylinder inserted into the spring 34.

Those skilled in the art can understand and make changes to the above embodiments without departing from the broad concept of the present invention. Therefore, this case is not limited to the specific embodiments disclosed in the specification. All modifications made based on the spirit and technical scope of this case should be covered and protected by the textual content defined in the scope of the patent application.

10: Wrench

11: handle body

12:Head

13: Ratchet Chamber

14: Groove

15: round hole

16: Gear groove

17: Narrow section

18: Broad section

19: Direction buttonhole

20:Switch slot

21: Restriction hole

22: Bushing

23: Concave surface

24: Convex surface

25, 26: Azimuth hole

27:convex part

Claims (8)

An improvement on the positioning mechanism of a wrench direction button, including: A wrench (10) having a directional buttonhole (19) connected to a wide section (18) in the middle of a gear groove (16), the wide section (18) going to both sides of the gear groove (16) Each end extends a tapered narrow section (17); A toothing (40) is inserted into the toothing slot (16), and the toothing (40) moves through the wide section (18) to one of the two narrow sections (17); A direction button (30), which is installed in the direction button hole (19) and can rotate; A through hole (32) is formed in the direction button (30), with two ends of the through hole (32) facing the walls of the wide section (18) and the direction button hole (19) respectively; Two azimuth holes are directly or indirectly located in the directional buttonhole (19) and are spaced apart from each other; and A latch (33), a spring (34) and a steel ball (35) jointly install the through hole (32). One end of the spring (34) pushes the latch (33) and extends into any narrow section (32). 17) and resist the gear (40), the other end of the spring (34) drives the steel ball (35) to catch one of the azimuth holes (25, 26) to prevent the gear (40) from changing the latch (33) orientation to strengthen the positioning function. The improvement of the wrench direction button positioning mechanism as described in claim 1, wherein the two azimuth holes directly form the wall of the direction button hole (19), so that the azimuth hole faces the through hole (30) of the direction button (30) 32). The improvement of the wrench direction button positioning mechanism as claimed in claim 1, wherein the two azimuth holes (25, 26) are formed in a bushing (22), and the bushing (22) is inserted into the direction button hole (19). Between the wall and the direction button (30), the azimuth holes (25, 26) are indirectly located in the direction button hole (19) and face the through hole (32). The improved positioning mechanism of the wrench direction button as described in claim 3, wherein the bushing (22) has a raised portion (27) that can be inserted into a limiting hole (21) at the bottom of the direction button hole (19), The bushing (22) must not move relative to the wrench (10). The improvement of the wrench direction button positioning mechanism as claimed in claim 3, wherein the direction button (30) prevents the bushing (22) from leaving the direction button hole (19) of the wrench (10). The improvement of the wrench direction button positioning mechanism as described in claim 1, wherein the latch (33) partially extends out of the direction button (30) and blocks the wall of the wide section (18) to prevent the direction button (30) from falling off. . The improvement of the wrench direction button positioning mechanism as described in claim 1, wherein the latch (33) can be a cartridge case with a hollow interior. The improvement of the wrench direction button positioning mechanism as described in claim 1, wherein the latch (36) can be a multi-step cylinder with different diameters.

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