TW202026511A - Knob-type cabinet combination lock structure can accurately locate the locked and unlocked positions - Google Patents

Abstract

A knob-type cabinet combination lock structure includes: a fixing member for fixing to a cabinet door panel; a first positioning groove and a second positioning groove are recessed in the fixing member, and a peripheral edge of the fixing member is formed with a first notch and a second notch at the position corresponding to the first positioning groove and the second positioning groove; a lock core is penetrated through the fixing member, and an elastic arm is formed on one side of the lock core; a ball portion is protruded at the end of the elastic arm. The elastic arm allows the ball portion to be elastically placed in the first positioning groove and the second positioning groove, a cover body covers the fixing member and locks the disc body, and the cover body cooperates with the disc body to be assembled with a combination lock and a lock fastener; the lock fastener is provided with a lock bolt for selecting the first notch or the second notch inserted into the fixing member, so as to clear the correct password in the first time when it can be opened to improve its anti-theft effect.

Description

Knob type cabinet code lock structure

The invention relates to an anti-theft lock for cabinets, in particular to a knob type cabinet code lock structure capable of accurately positioning the locked and unlocked positions.

Press, a conventional cabinet combination lock structure, as shown in Figure 10, includes: a fixed base 50, a lock core 60, a combination lock 70 and a locking plate 80, the fixed base 50 The lock is arranged in the cabinet, and the periphery of the fixing base 50 is recessed with a notch 51, the lock core 60 passes through the fixing base 50, and a bracket 61 is formed at one end of the notch 51 of the fixing base 50, and the lock The core 60 is locked with a baffle 62 at the other end. The combination lock 70 has a rod 71 through which a plurality of code wheels 72 and a limit wheel 73 are inserted, and the code lock 70 is pivoted to the bracket by the rod 71 61. A plurality of push claws 81 are formed at one end of the locking plate 80, and a locking tongue 82 is extended at the other end. The locking plate 80 is sandwiched between the combination lock 70 and the bracket 61, and is pushed The pawl 81 abuts against the limit wheel 73, so that the code lock is in the locked state. The limit wheel 73 can push the push claw 81 so that the lock tongue 82 is inserted into the notch 51 of the fixing base 50, thereby It has the function of locking and preventing theft, but it is not difficult to find out that there are some shortcomings in the above-mentioned conventional structure. The main reasons are as follows: the locked position and the unlocked position of the combination lock cannot be accurately positioned, which leads to the The lock tongue 82 interferes with the fixing base 50, which causes the operation to be unsmooth. Furthermore, when the lock tongue 82 is unlocked and detaches from the notch 51, the lock tongue 82 is rotated until there is no notch 51. When the fixed seat 50 blocks the bolt 82, the code wheel 72 can no longer be toggled. Therefore, the code lock 70 will display the correct code that can be unlocked, so that other people present have a chance Know the correct code of the code lock, so There is insufficient anti-theft effect. Finally, the combination lock has obvious shortcomings in assembly. The main reason is that there is only one assembly method between the gap 51, the bolt 82 and the cabinet. If it is not assembled according to the specific position, it will Unable to use, the above shortcomings are all technical problems that the creation wants to improve.

In view of this, the inventor of the present invention has been engaged in the manufacturing, development and design of related products for many years. Aiming at the above-mentioned goals, after detailed design and careful evaluation, he finally obtained a practical invention.

The technical problem to be solved by the present invention is to provide a knob-type cabinet code lock structure in view of the above-mentioned deficiencies in the prior art.

A fixing member constitutes an accommodating space with a bottom plate and a ring surrounding the periphery of the bottom plate, and a tube communicating with the accommodating space extends from the center of the bottom plate, and the bottom plate is recessed in the accommodating space A first positioning groove and a second positioning groove, a first notch and a second notch are formed in the ring relative to the first positioning groove and the second positioning groove, a disc body is formed at one end of a lock core, and The other end of the lock cylinder is formed with a rod body, and the lock cylinder penetrates the tube body with the rod body and is fixed with a baffle plate at the exit point. In addition, the plate body is formed with an elastic plate seat transversely arranged in the center, and the elastic plate The seat is provided with an elastic piece, and the disc body is formed with an elastic arm on one side of the elastic piece seat, and a ball portion is protruded at the end of the elastic arm, and the elastic arm allows the ball portion to be elastically inserted into the first The positioning groove and the second positioning groove, and the disc body is formed with a latch seat on the other side of the elastic plate seat, a cover body covers the ring of the fixing member and locks the disc body, and the cover body There are two brackets protruding from the part, and a plurality of hollow openings are opened between the two brackets, and the cover body is equipped with a combination lock with the bracket, and the combination lock is connected in series with a plurality of wheels and A plurality of limit wheels, and the runner is protruded from the hollow opening and pressed against the elastic sheet to form a rotary positioning, a locking member It is arranged at the bolt seat of the lock cylinder, and the locking member is formed with a plurality of push rods facing the combination lock, and the locking member is protrudingly provided with a locking tongue toward the ring direction, and an elasticity is accommodated in the locking member The elastic member allows the push rod to abut the limit wheel, and the limit wheel can push the lock tongue to select the first notch or the second notch of the fixing member.

Wherein, the first notch and the second notch of the fixing member form an included angle of 90 degrees to the center of the bottom plate, and when the ball portion of the elastic arm is inserted into the first positioning groove, the lock tongue is aligned and inserted into the first notch , And make the baffle form the locked state of the cabinet, and when the ball portion of the elastic arm is inserted into the second positioning groove, the lock tongue is aligned and inserted into the second notch, and the baffle is formed into the cabinet's unrestricted state. Locked state.

Wherein, the bottom plate is recessed with a third positioning groove and a fourth positioning groove in the accommodating space, and the ring is formed with a third notch and a fourth positioning groove relative to the third positioning groove and the fourth positioning groove. Notch, the first notch, second notch, third notch, and fourth notch of the fixing member are all 90 degrees apart from the center of the bottom plate, so that the locked position and the unlocked position of the cabinet can be selected Two of the adjacent notches and the positioning grooves.

Wherein, the limit wheel is formed with a flat surface, and when the lock rod controls the flat surface to abut the push rod, the lock tongue is formed in an unlocked state where the first notch or the second notch is penetrated.

Wherein, the cover body is provided with a perforation, and the perforation provides one end of the lock rod to pass through, and the other end of the lock rod is sleeved with a spring, pressing the lock rod to form a squeeze on the spring, so that the runner and the The limit wheel is separated and different unlock codes can be set.

Wherein, the lock member is recessed with a slot at the lock tongue, and a stop block is protruded from the lock member position inside the cover, and the stop block penetrates the slot and blocks one end of the elastic member .

The first main purpose of the present invention is that the ball portion of the lock cylinder is placed in the first positioning groove in the locked state, and the ball portion is placed in the second positioning groove in the unlocked state, so that the The lock tongue can accurately face the first notch and the second notch, thereby preventing misalignment and interference, thereby improving the smoothness of its operation.

The second main purpose of the present invention is that when the cover body rotates the lock cylinder to the unlocked position, the elastic arm can elastically form the ball part to escape from the first positioning groove and slide into the second positioning of the fixing member The groove is used to locate the relative position of the fixing member and the lock core, so that the lock tongue can accurately face the second notch. When the cabinet door can be opened, the user can turn the wheel of the combination lock , So that the limit wheel pushes the lock tongue into the second gap, that is, the correct password can be cleared within the first time of opening, thereby effectively preventing the password from being known by others on the scene, so as to improve its anti-theft effect.

The third main purpose of the present invention is that the bottom plate of the fixing member is recessed with a third positioning groove and a fourth positioning groove in the containing space, and the ring is opposite to the third positioning groove and the fourth positioning groove The position is formed with a third notch and a fourth notch, so that when the fixing member is locked on the cabinet door, the first notch and the second notch need not be aligned with the locked position and the unlocked position, and the lock When the core is installed on the fixing member and fixing the baffle, there is no need to deliberately align the first notch with the second notch, thereby improving the convenience of its assembly, and being able to match the drawer (upward locking) and The different locking angles of the cabinet doors (locked to the left and right) are to effectively improve its applicability.

Other purposes, advantages and novel features of the present invention will be more apparent from the following detailed description and related drawings.

[This creation]

A‧‧‧Cabinet Door

B‧‧‧Cabinet

10‧‧‧Fixture

11‧‧‧Bottom plate

111‧‧‧First positioning slot

112‧‧‧Second positioning slot

113‧‧‧Third positioning slot

114‧‧‧Fourth positioning slot

12‧‧‧Circle

121‧‧‧First gap

122‧‧‧Second gap

123‧‧‧The third gap

124‧‧‧The fourth gap

13‧‧‧Accommodation space

14‧‧‧Pipe body

20‧‧‧Lock cylinder

21‧‧‧Plate body

211‧‧‧Shrapnel Holder

212‧‧‧Lock tongue seat

22‧‧‧Pole body

23‧‧‧Bezel

24‧‧‧Shrapnel

25‧‧‧flexible arm

251‧‧‧Ball

30‧‧‧Cover body

31‧‧‧Support

32‧‧‧ Hollow

33‧‧‧Password lock

331‧‧‧Lock lever

332‧‧‧wheel

333‧‧‧Limit wheel

333a‧‧‧Plane

334‧‧‧Spring

34‧‧‧Block

35‧‧‧Perforation

40‧‧‧Lock firmware

41‧‧‧Putter

42‧‧‧Lock tongue

421‧‧‧Slotting

43‧‧‧Elastic parts

[Learning]

50‧‧‧Fixed seat

51‧‧‧Gap

60‧‧‧Lock cylinder

61‧‧‧Bracket

62‧‧‧Bezel

70‧‧‧Password Lock

71‧‧‧Pole body

72‧‧‧Password Wheel

73‧‧‧Limit wheel

80‧‧‧Locking plate

81‧‧‧Push claw

82‧‧‧Lock tongue

Figure 1 is a perspective view of the present invention.

Figure 2 is an exploded perspective view of the present invention.

Figure 3 is a schematic diagram of the present invention assembled in a cabinet.

Figure 4 is a front cross-sectional view of the present invention in a locked state.

Figure 5 is a side sectional view of the present invention in a locked state.

Figure 6 is a side cross-sectional view of the present invention in the unlocked state.

Figure 7 is a front cross-sectional view of the present invention in an unlocked state.

Figure 8 is a schematic diagram of the present invention in the rotating baffle.

Figure 9 is a schematic diagram of the present invention in the chaotic password.

Figure 10 is a three-dimensional view of conventional knowledge.

In order to enable your reviewer to have a further understanding and understanding of the purpose, features and effects of the present invention, the following please cooperate with the [Schematic Description] as detailed below: First, please continue from Figure 1 to Figure 4. In view of this, a knob type cabinet code lock structure includes: a fixing member 10, a lock core 20, a cover body 30 and a locking member 40. A fixing member 10 is surrounded by a bottom plate 11 and the bottom plate 11 A ring 12 on the periphery constitutes an accommodating space 13. The bottom plate 11 extends in the center with a tube body 14 communicating with the accommodating space 13, and the fixing member 10 is fixed to the cabinet door panel A by the tube body 14, and the bottom plate 11 A first positioning groove 111 and a second positioning groove 112 are recessed in the accommodating space 13, and the ring 12 relative to the first positioning groove 111 and the second positioning groove 112 is formed with a first notch 121 and A second notch 122, and the first notch 121 and the second notch 122 of the fixing member 10 form an included angle of 90 degrees to the center of the bottom plate 11. One end of the lock cylinder 20 is formed with a disc body 21, and the other end of the lock cylinder 20 Formed a shot Body 22, and the lock core 20 passes through the tube body 14 with the rod body 22, and a baffle 23 is fixed at the exit, and the baffle 23 is used to block the cabinet B to form the anti-opening effect of the cabinet door A , And the disc body 21 is formed with an elastic piece seat 211 transversely arranged in the center, and an elastic piece 24 is arranged on the elastic piece seat 211, and the disc body 21 is formed with an elastic arm 25 on one side of the elastic piece seat 211, and The end of the elastic arm 25 is protrudingly provided with a ball portion 251, and the elastic arm 25 allows the ball portion 251 to be selectively inserted into the first positioning groove 111 and the second positioning groove 112, and the disc body 21 is placed on the elastic plate seat The other side of 211 is formed with a latch seat 212, wherein a cover body 30 covers the ring 12 of the fixing member 10 and locks the plate body 21, and the cover body 30 is provided with two brackets 31 protruding inside, and A plurality of hollow openings 32 are opened between the two brackets 31, and the cover body 30 is equipped with a combination lock 33 by the bracket, and the combination lock 33 is connected with a plurality of rotating wheels 332 and a plurality of wheels 332 in series with a lock rod 331 A limit wheel 333, and the rotating wheel 332 is protruding from the hollow opening 32 and pressed against the elastic sheet 24 to form a rotational positioning. A locking member 40 is arranged at the bolt seat 212 of the lock cylinder 20, and the locking member A plurality of push rods 41 are formed at 40 facing the code lock 33, and the locking member 40 is protrudingly provided with a lock tongue 42 facing the direction of the ring 12, and the lock tongue 42 contains an elastic member 43 through the elastic member 43 Let the push rod 41 abut the limit wheel 333, and the limit wheel 333 can push the lock tongue 42 to select the first gap 121 or the second gap 122 of the fixing member 10, and the limit wheel 333 A flat portion 333a is formed, and when the locking lever 331 controls the flat portion 333a to abut the push rod 41, the locking tongue 42 does not pass through the first notch 121 or the second notch 122 in an unlocked state, accordingly, When the ball portion 251 of the elastic arm 25 is inserted into the first positioning groove 111, the locking tongue 42 is aligned and inserted into the first notch 121, and the baffle 23 is formed into the locked state of the cabinet B, and the elastic When the ball portion 251 of the arm 25 is inserted into the second positioning groove 112, the lock tongue 42 is aligned and inserted into the second notch 122, and the baffle 23 is formed in the unlocked state of the cabinet B, and the locking member 40 A slot 421 is recessed in the lock tongue 42, and the inside of the cover 30 is fixed in the lock A stopper 34 is protruded at the position of the member 40. The stopper 34 penetrates the slot 421 and blocks one end of the elastic member 43. In addition, the cover 30 is provided with a through hole 35, and the through hole 35 provides the lock rod 331 One end of the lock rod 331 passes through, and the other end of the lock rod 331 is sleeved with a spring 334. Pressing the lock rod 331 forms a squeeze on the spring 334, so that the runner 332 and the limit wheel 333 are separated and different unlocking codes can be set .

Wherein, as shown in Figures 2, 3, and 4, the bottom plate 11 of the fixing member 10 is recessed with a third positioning groove 113 and a fourth positioning groove 114 in the accommodating space 13, and the ring 12 faces the A third notch 123 and a fourth notch 124 are formed at the positions of the third positioning groove 113 and the fourth positioning groove 114, and the first notch 121, the second notch 122, the third notch 123 and the fourth notch 124 of the fixing member 10 All to the center of the bottom plate 11 are mutually spaced at an angle of 90 degrees, so that the locked position and the unlocked position of the cabinet B can choose two of the adjacent notches (121, 122, 123, 124) and The aforementioned positioning grooves (111, 112, 113, 114), that is, when the fixing member 10 is locked on the cabinet door panel A, the first notch 121 and the second notch 122 need not be intentionally aligned with the locked position and the unlocked position. Fixed position, and when the lock core 20 is installed on the fixing member 10 and the baffle 23, there is no need to deliberately align the first notch 121 and the second notch 122, thereby improving the convenience of assembly. It can better match the different locking angles of the drawer (locking upwards) and the cabinet door (locking left and right), so as to effectively improve its applicability.

The combination of its structure, please continue from Figure 1 to Figure 5, the elastic piece 24 is installed on the elastic piece seat 211 of the lock cylinder 20, and then the lock rod 331 is connected in series with the spring 334 and the runner 332 and the limit wheel 333, the combination lock 33 is installed on the disc body 21 and pressed against the elastic sheet 24, and the locking member 40 is installed on the bolt seat 212 of the disc body 21, and The push rod 41 abuts against the limit wheel 333 of the code lock 33, and the bolt 42 of the lock member 40 is additionally equipped with the elastic The part 43 is further covered with the cover 30 to cover the plate 21 of the lock core 20, and the combination lock 33 is clamped and fixed by the bracket 31 of the cover 30, so that the runner 332 is partially exposed on the cover 30 The hollow opening 32 is used to accommodate the elastic sheet 24, the code lock 33, the locking member 40 and the elastic member 43 between the lock core 20 and the cover 30, and to fix the lock core 20 and the cover in a screw lock manner Body 30, and then insert the rod 22 of the lock core 20 into the tube body 14 of the fixing member 20, so that the disc 21 of the lock core 20 is accommodated in the accommodating space 13 of the fixing member 10, and the cover 30 It covers the periphery of the ring 12. In this state, the ball portion 251 of the lock cylinder 20 can be received in the first positioning groove 111 of the fixing member 10, and the lock tongue 42 of the lock member 40 is correspondingly protruding from The first notch 121 finally locks the baffle 23 on the end of the rod body 22 that passes through the tube body 14, thereby achieving the practical effect of easy assembly.

For the actual effect of use, please continue from Figure 2 to Figure 9. This creation uses the tube 14 of the fixing member 10 to be locked on the cabinet door A, so that the baffle 23 can swing to form the The cabinet B and the cabinet door panel A are relatively locked. When the rotating wheel 332 of the code lock 33 rotates to the correct code, the user can press the lock lever 331 to separate the rotating wheel 332 from the limit wheel 33, and Rotate the wheel 332 to change the code. After the lock lever 331 is released, the spring 334 is pushed back to form a combination of the wheel 332 and the limit wheel 33. When the cabinet door A is locked, the The ball portion 251 of the lock cylinder 20 is positioned in the first positioning groove 111 of the bottom plate 11 of the fixing member 10, so that the tongue 42 of the lock member 40 can be aligned with the first notch 121 of the ring 12, and cooperate with the rotation The wheel 332 rotates to the incorrect code position, so that the limit wheel 333 can push the lock tongue 42 of the locking member 40 to protrude from the first notch 121, and then form a locked state. In the locked state, the fixing member 10 The lock member 40 can be blocked so that the cover 30 cannot be rotated, and the lock core 20 cannot be switched to the unlocked position in conjunction with the baffle 23, thereby forming the anti-theft function of the cabinet B. In addition, when the cabinet door A should be opened Switch the code lock 33 to the correct code, so that the plane portion 333a of the limit wheel 333 When facing the locking member 40, the elastic member 43 will push the locking member 40 so that the push rod 41 is pressed against the flat portion 333a, and the locking tongue 42 is drawn back from the first notch 121, thereby forming In the unlocked state, the user can rotate the cover 30 to link the baffle 23, so that the baffle 23 is not blocked by the cabinet B and can directly open the cabinet door A. Furthermore, the cover 30 links the lock cylinder 20 When rotated to the unlocked position, the elastic arm 25 can elastically form the ball 251 to escape the first positioning groove 111 and slide into the second positioning groove 112 of the fixing member 10, thereby positioning the fixing member 10 and the The relative position of the lock cylinder 20 enables the lock tongue 42 to accurately face the second gap 122. When the cabinet door A can be opened, the user can turn the wheel 332 of the combination lock 33 to make the limit The bit wheel 333 pushes the lock tongue 42 into the second gap 122, that is, the correct password can be cleared within the first time of opening, thereby effectively preventing the password from being learned by others present, so as to improve its anti-theft effect. Therefore, the ball portion 251 of the lock core 20 is placed in the first positioning groove 111 in the locked state, and the ball portion 251 is placed in the second positioning groove 112 in the unlocked state, so that the lock tongue 42 can accurately face the first notch 121 and the second notch 122, thereby preventing misalignment and causing interference, so as to improve the smoothness of its operation.

In summary, the present invention has indeed achieved a breakthrough structural design, and has an improved content of the invention. At the same time, it can achieve industrial applicability and progress. Moreover, the present invention has not been seen in any publications, and it is also novel. In accordance with the relevant provisions of the Patent Law, Yan filed an application for a patent for invention in accordance with the law, and I implore the Jun Bureau review committee to grant a legal patent.

Only the above is only a preferred embodiment of the present invention, and should not be used to limit the scope of implementation of the present invention; that is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention shall still belong to the present invention Covered by the patent.

10‧‧‧Fixture

11‧‧‧Bottom plate

111‧‧‧First positioning slot

112‧‧‧Second positioning slot

113‧‧‧Third positioning slot

114‧‧‧Fourth positioning slot

12‧‧‧Circle

121‧‧‧First gap

122‧‧‧Second gap

123‧‧‧The third gap

124‧‧‧The fourth gap

13‧‧‧Accommodation space

14‧‧‧Pipe body

20‧‧‧Lock cylinder

21‧‧‧Plate body

211‧‧‧Shrapnel Holder

212‧‧‧Lock tongue seat

22‧‧‧Pole body

23‧‧‧Bezel

24‧‧‧Shrapnel

25‧‧‧flexible arm

251‧‧‧Ball

30‧‧‧Cover body

31‧‧‧Support

32‧‧‧ Hollow

33‧‧‧Password lock

331‧‧‧Lock lever

332‧‧‧wheel

333‧‧‧Limit wheel

334‧‧‧Spring

34‧‧‧Block

35‧‧‧Perforation

40‧‧‧Lock firmware

41‧‧‧Putter

42‧‧‧Lock tongue

421‧‧‧Slotting

43‧‧‧Elastic parts

Claims (6)

A knob-type cabinet code lock structure, comprising: a fixing piece, the fixing piece constitutes an accommodating space with a bottom plate and a ring surrounding the periphery of the bottom plate, and the center of the bottom plate extends with the accommodating space The tube body, and the bottom plate is recessed in the accommodating space with a first positioning groove and a second positioning groove, and the ring is formed with a first notch and a position relative to the first positioning groove and the second positioning groove. A second gap; a lock cylinder, one end of the lock cylinder is formed with a disc body, and the other end of the lock cylinder is formed with a rod body, and the lock cylinder with the rod body penetrates the tube body and is fixed with a stop Plate, the disc body is formed with an elastic piece seat horizontally arranged in the center, and an elastic piece is arranged on the elastic piece seat, and the disc body is formed with an elastic arm on one side of the elastic piece seat, and a protruding elastic arm is provided at the end of the elastic arm The ball portion, and the elastic arm allows the ball portion to be elastically inserted into the first positioning groove and the second positioning groove, and the disc body is formed with a latch seat on the other side of the elastic plate seat; a cover Body, the cover body covers the ring of the fixing member and locks the plate body, and the cover body is provided with two brackets protruding inside, and a plurality of hollow openings are opened between the two brackets, and the cover body is The bracket is equipped with a combination lock, and the combination lock is connected with a plurality of runners and a plurality of limit wheels in series with a lock rod, and the runner is protruding from the hollow opening and pressing the elastic sheet to form a rotary positioning And a locking member, the locking member is arranged at the bolt seat of the lock cylinder, and the locking member is formed with a plurality of push rods facing the combination lock, and the locking member is convexly provided with a locking tongue in the direction of the ring, In addition, an elastic member is housed in the lock tongue, through which the push rod is allowed to abut the limit wheel, and the limit wheel can push the lock tongue to select the first notch or the second notch of the fixing member. gap. According to the knob type cabinet code lock structure described in item 1 of the scope of patent application, wherein the first and second notches of the fixing member form an included angle of 90 degrees to the center of the bottom plate, and the elastic arm When the ball part is inserted into the first positioning groove, the lock tongue is aligned and inserted into the first notch, and the baffle is formed into the lock state of the cabinet, and when the ball part of the elastic arm is inserted into the second positioning groove The lock tongue is aligned and inserted into the second notch, and the baffle is formed into an unlocked state of the cabinet. According to the knob type cabinet code lock structure described in item 1 of the scope of patent application, the bottom plate is recessed with a third positioning groove and a fourth positioning groove in the accommodating space, and the ring is positioned relative to the third The slot and the fourth positioning slot are formed with a third notch and a fourth notch, and the first, second, third and fourth notches of the fixing member are all separated by 90 degrees from the center of the bottom plate. , So that the locked position and the unlocked position of the cabinet can choose two of the adjacent notches and the positioning grooves. According to the knob type cabinet code lock structure described in item 2 or item 3 of the scope of patent application, the limit wheel is formed with a flat portion, and the lock bolt is formed when the lock rod controls the flat portion to resist the push rod. The unlocked state of the first notch or the second notch is penetrated. According to the knob type cabinet code lock structure described in item 1 of the scope of patent application, the cover is provided with a perforation, and the perforation provides one end of the lock rod to pass through, and the other end of the lock rod is sleeved with a spring to press The lock rod forms the squeeze of the spring, so that the runner and the limit wheel are separated and different unlocking codes can be set. According to the knob-type cabinet code lock structure described in item 1 of the scope of patent application, wherein the lock member is recessed with a slot at the bolt, and the inside of the cover body is convexly provided with a stop at the position of the lock member, and The stopper passes through the slot and blocks one end of the elastic member.

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