TWM644879U - Quick release gun bore device - Google Patents

Abstract

The invention provides a quick-detachable gun chamber device. The gun chamber device includes: a gun chamber body, a gun barrel and a gun body. The gun barrel is arranged on one of the gun chamber bodies. On the second through hole, the gun chamber body is assembled with a first hole position and a second hole position of the gun body using a first fastener and a second fastener respectively, and the A base of the gun barrel is assembled with a slot of the gun body, so that the gun chamber body can be assembled correspondingly with the gun body, thereby utilizing the gun chamber body A stopper pushes a pusher and moves the second fastener at the same time, so that the second fastener can be separated from the second hole and the base can be separated from the slot, and then the first fastener can be used as a support point. By rotating the gun chamber body, the action of the gun chamber body and the gun body can be quickly and easily separated.

Description

Quick release chamber device

The invention relates to a gun chamber device, in particular to a quick-detachable gun chamber device that can quickly and easily separate the gun chamber device and reload its firing object.

Generally speaking, food is the most important thing for people. In order to maintain the normal development of body functions, human beings have tried their best to find sources of food. Even now, agriculture, fishery, animal husbandry, and breeding are quite developed, and sometimes even food shortages occur. There are problems such as too much or overproduction, but hunting is human instinct after all. Some areas will allow hunters to open hunting activities for specific species. In addition to satisfying food sources, it is also one of the ways to maintain ecological balance to a certain extent. , in Taiwan, aboriginal people are one of the licensees to own shotguns. Aboriginal people must be in the prescribed hunting grounds and apply for permission before they can participate in relevant hunting activities. Although the shotguns used by aboriginal people can be homemade, their structure And the performance is quite immodest, crude and even dangerous under the provisions of the law, because a gunpowder must be filled into the barrel from the muzzle, and then a projectile must be placed in the front end of the gunpowder, and then a gun bar must be used to seal it. The projectile and its gunpowder are stuffed tightly into the barrel, and finally the gunpowder is detonated by striking a primer or igniting to launch the projectile. This kind of firearm structure and operation method are probably from the 18th and 19th centuries. Technology and products, if you are not careful, may cause dangers such as explosion or spontaneous combustion. This is what we have learned from relevant history channels or textbooks. It is common knowledge if you have read the introduction or taken a class, and firearms with this structure will emit a large amount of flames and sparks during shooting, and the loading process is also quite cumbersome, troublesome and dangerous.

Therefore, how to improve the above-mentioned deficiencies is the technical difficulty that the creator of this case wants to solve.

Therefore, in order to achieve the above purpose, the present invention provides a quick-detachable gun chamber device. The gun chamber device includes: a gun chamber body, a gun barrel and a gun body. The gun chamber body There is a first fastener at the inner bottom end position, and the gun barrel is provided with a push piece at one side position. One end of the push piece is formed with a push part and the other end is formed with a connecting part, and The connecting part is pivotally connected to a turning part on a backstop member. One end of the backstop member has a set of connection holes, and the set of connection holes is pivoted on one end of a connecting piece. The connecting piece has a central position. The first set of holes is provided, and the barrel body has a first through hole at the inner middle end, a second fastener is partially disposed in the first through hole, and an end edge of the second fastener is A set of connecting parts is formed on the upper end of the barrel and a bullet head is formed on the other end edge. The connecting parts can be assembled correspondingly with the first set of holes, and the barrel body has a second set of connecting parts at the inner top position. Perforation, the gun barrel is arranged in the second perforation, and the barrel is formed with a base at one end edge, and an annular groove is formed adjacent to one side of the base, and the gun body There is a first hole at the inner bottom position, the first fastener is disposed in the first hole, and the gun body has a second hole at the inner middle end, the The other part of the second fastener is disposed in the second hole, and the gun body has a slot at the inner top position, and the slot extends toward one side of the gun body to form respectively There is an expanded part and a narrow part, the base is arranged in the expanded part and The annular groove is provided in the narrow portion so that the gun chamber body and the gun system can be assembled correspondingly to each other, whereby the user can pull the retraction member and push the push portion of the push member against Push one end of the expansion portion and at the same time, the connecting hole drives the second fastener to disengage from the second hole through the connecting piece. The user can use the first fastener as a supporting point to rotate the gun barrel and By pulling the first fastener out of the first hole, the gun chamber body and the gun body can be quickly and easily separated. In addition, the user can use the first fastener as a support point. When the gun body is rotated, the warhead can also be arranged in an arc groove on one side of the gun body to facilitate the withdrawal of a firing object from the barrel and the reloading of the firing object. things.

1: Gun chamber device

2: Gun chamber body

21:First card firmware

211:cut part

212: concave part

22: Guide rail

23: Pushing parts

231: Pushing part

232:Reception Department

233:Trough rail

234:Assemblies

24:Return parts

241: Turning point

242: Assembly hole

25: Connector

251: The first set of holes

252: The second set of holes

253: The third set of holes

26: First piercing

261: Block part

27: Second card firmware

271:Assembly and connection department

272: Warhead

273: Elastic element

274: Arrival

28: Fasteners

281:Guide trough

29: Second piercing

3: Barrel

31:Hangzuo

32: Ring groove

4: Gun body

41: The first hole position

411:Card Department

42:Second hole position

43:Slot

431:Expansion

432: Narrow part

44: Arc groove

Picture 1 is a three-dimensional appearance of this creation.

Picture 2 is the first three-dimensional exploded view of this creation.

Figure 3 is the second three-dimensional exploded view of this creation.

Figure 4 is a partial schematic diagram of this creation.

Figure 5 is a schematic diagram of a preferred embodiment of this invention.

Figure 6 is the second schematic diagram of the preferred embodiment of this invention.

Figure 7 is the third schematic diagram of the preferred embodiment of this invention.

Figure 8 is a schematic diagram 4 of the preferred embodiment of this invention.

Figure 9 is a schematic diagram 5 of the preferred embodiment of this invention.

Please also refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8 and Figure 9, which are the three-dimensional appearance of this creation. Stereoscopic analysis It can be clearly seen from the diagrams 1 and 2, the partial schematic diagrams and the schematic diagrams 1 to 5 of the preferred embodiment, in which the barrel device 1 has:

A rifle chamber body 2. The rifle chamber body 2 has a first fastener 21 at the inner bottom end. The first fastener 21 is formed with a cutout 211 on one end edge and is adjacent to the cutout. 211 is formed with a recess 212 on one side, and the gun chamber 2 is formed with a guide rail 22 on one side. The guide rail 22 is provided with a push piece 23, and one end of the push piece 23 is formed with a push portion 231 and The other end is formed with a connecting portion 232, and the pusher 23 has a plurality of groove rails 233. Each of the plurality of groove rails 233 uses a set of connectors 234 to pivot the pusher 23 to the gun chamber body. 2, and the connecting portion 232 is pivotally connected to a turning portion 241 on a retraction member 24 by using the assembly member 234. One end of the retraction member 24 has a set of connecting holes 242, and the set of connecting holes 242 The assembly member 234 is pivotally connected to a second assembly hole 252 at one end of a connector 25. The connector 25 has a first assembly hole 251 at a central position, and the connector 25 is There is a third assembly hole 253 at the other end relative to the second assembly hole 252, and the barrel body 2 has a first through hole 26 and a second fastener 27 at the inner middle end. It is partially disposed in the first through hole 26. A set of connecting parts 271 is formed on one end edge of the second fastener 27 and a bullet head 272 is formed on the other end edge. The connecting part 271 can be connected with the first The assembly holes 251 are assembled correspondingly, and an elastic element 273 is sleeved on the second fastener 27, and the barrel body 2 is provided with a fixing piece 28 on the other side. The component 28 has a guide groove 281 at the center of the interior. The third assembly hole 253 is pivotally connected to the guide groove 281 using the assembly member 234, and the gun chamber 2 is located at the top of the interior. Having a second through hole 29;

A gun barrel 3, the gun barrel 3 is arranged in the second through hole 29, and the gun barrel 3 is formed with a base 31 on one end edge, and a ring is formed on one side of the base 31 groove 32;

A gun body 4, the gun body 4 has a first hole 41 at the inner bottom position, the first fastener 21 is disposed in the first hole 41, and the gun body 4 There is a second hole 42 at the inner middle position, and the second fastener 27 is covered with the elastic element 273. The second fastener 27 utilizes the strong elastic force of the elastic element 273 to make the second fastener 27. The other part of the fastener 27 is disposed in the second hole 42, and the gun body 4 has a slot 43 at the inner top position. The slot 43 faces one side of the gun body 4. The extended openings are respectively formed with an expanded portion 431 and a narrow portion 432. The base 31 is passed through the expanded portion 431 and the annular groove 32 is disposed in the slot 43 through the narrow portion 432, whereby, The gun chamber body 2, the gun barrel 3 and the gun body 4 can be assembled corresponding to each other, and the gun body 4 has an arc groove 44 on one side;

Among them, the plurality of groove rails 233 are arranged on the pusher 23 in a longitudinal manner, and the plurality of groove rails 233 are pivotally provided with the assembly member 234 so that the pusher 23 can move on the guide rail 22 superior;

Among them, the spare part 24 is slightly in the shape of "L";

Wherein, the first through hole 26 is formed with a stopper 261 at one end, and one end of the elastic element 273 is against the stopper 261;

Among them, the second fastener 27 has a resisting portion 274, and the other end of the elastic element 273 is against the resisting portion 274;

Wherein, the assembly member 234 is movable in the guide groove 281;

The first hole 41 has a catch portion 411 at the upper end, and the cut portion 211 passes through the catch portion 411 in a flush manner and the recessed portion 212 is locked on the catch portion 411;

Wherein, the expanded portion 431 is located inside the slot 43 and the narrow portion 432 is located inside Outside the slot 43;

Wherein, the arc groove 44 gradually expands from the inside to the outside and is located on one side of the gun body 4 between the first hole 41 and the second hole 42. The warhead 272 can be disposed accordingly. On the arc groove 44;

Wherein, the assembly hole 242 is pivotally connected to the second assembly hole 252 using the assembly member 234, and the third assembly hole 253 is pivotally connected to the guide groove 281 using the assembly member 234, and the assembly portion 271 is assembled correspondingly with the first assembly hole 251. When the retraction member 24 is pulled upward, the connecting member 25 will drive the second fastening member 27 forward in a linear motion to move in the first through hole 26 and disengage from the first hole 251. The second hole is located in 42;

The connecting part 232 is pivotally connected to the turning part 241 through the assembly part 234. Pulling the retraction part 24 upward will simultaneously drive the pushing part 23 to move backward and the pushing part 231 will resist the slot. 43;

The main thing is that the barrel body 2 has the first fastener 21 at the inner bottom end, and the first fastener 21 has the cutout 211 formed on one end edge and is close to the cutout 211 The recess 212 is formed on one side, and the guide rail 22 is formed on one side of the gun chamber 2. The guide rail 22 is provided with the pusher 23, and one end of the pusher 23 is formed with the pusher 212. The connecting portion 232 is formed on the other end of the pushing piece 23, and the pushing piece 23 is provided with a plurality of groove rails 233. The plurality of groove rails 233 are arranged longitudinally on the pushing piece 23. , and each of the plurality of groove rails 233 uses the assembly member 234 to pivot the pusher 23 on the gun chamber 2, so that the pusher 23 can move on the guide rail 22, and the connector The setting portion 232 is pivotally connected to the turning portion 241 on the retraction control member 24 by using the assembly member 234. The retraction control member 24 is slightly in an "L" shape, and one end of the retraction control member 24 has the assembly. Connecting holes 242, and this set of connecting holes 242 is The assembly member 234 is pivotally connected to the second assembly hole 252 at one end of the connector 25. The connector 25 has the first assembly hole 251 at the central position, and the connector 25 is opposite to the first assembly hole 251. The third assembly hole 253 is provided at the other end of the second assembly hole 252, and the barrel body 2 has the first through hole 26 at the inner middle end, and the first through hole 26 is at The stopper 261 is formed on one end of the second fastener 27, and the second fastener 27 is partially disposed in the first through hole 26. The connecting portion 271 is formed on one end of the second fastener 27 and the third fastener 27 is formed on one end. The bullet head 272 is formed on the other end edge of the second clamping member 27, and the assembly portion 271 can be assembled correspondingly with the first assembly hole 251, and the elastic element 273 is sleeved on the second clamping member 272. On the fastener 27, and the second fastening member 27 has the resisting portion 274, one end of the elastic element 273 is against the blocking portion 261 and the other end is against the resisting portion 274, and the gun chamber body 2 The fixing part 28 is provided on the other side. The fixing part 28 has the guide groove 281 at the inner center position, and the third assembly hole 253 utilizes the assembly part 234 and the guide groove. 281 is pivotally connected, the assembly member 234 is movable in the guide groove 281, and the barrel body 2 has the second through hole 29 at the inner top position, and the barrel 3 is disposed on the In the second through hole 29, the gun barrel 3 is formed with the base 31 on one end edge, and the annular groove 32 is formed on one side of the base 31. The gun body 4 is formed at the inner bottom end of the barrel 3. The first hole 41 has the first hole 41 at the upper end position, and the first hole 41 has the catch portion 411 at the upper end. The cut portion 211 passes through the catch portion 411 in a flush manner and blocks the recessed portion 212 On the clamping portion 411, the first clamping member 21 is disposed in the first hole 41, and the gun body 4 has the second hole 42 at the inner middle end, and the third The second clamping member 27 is covered with the elastic element 273. The second clamping member 27 utilizes the strong elastic force of the elastic element 273 to make the elastic member 273 secure. The other part of the second fastener 27 is disposed in the second hole 42, and the gun body 4 has the slot 43 at the inner top position, and the slot 43 faces the gun body. The extended openings on one side are respectively formed with the expanded portion 431 and the narrow portion 432. The expanded portion 431 is located inside the slot 43 and the narrow portion 432 is located outside the slot 43. The base 31 The enlarged portion 431 and the annular groove 32 are arranged in the slot 43 through the narrow portion 432, whereby the gun bore 2 and the gun barrel 3 and the gun The bodies 4 can be assembled corresponding to each other, and the gun body 4 has an arc groove 44 on one side. The arc groove 44 gradually expands from the inside to the outside and is between the first hole 41 and the second hole 41 . On one side of the gun body 4 between the holes 42, the warhead 272 can be fitted in the arc groove 44, and the user can pull the brake upward when using the gun chamber device 1. 24. Since the retraction member 24 is slightly "L" shaped, and the connecting part 232 is pivotally connected to the turning part 241 using the assembly part 234, the plurality of groove rails 233 are arranged in a longitudinal manner. The pusher 23 is provided with the assembly component 234 on the plurality of groove rails 233, so that the pusher 23 can move on the guide rail 22, and the user pulls the retraction component 24 through the turning point. The part 241 moves the connecting part 232 and drives the pushing part 23 to move backward, and the pushing part 231 will resist the slot 43. Furthermore, the assembly hole 242 uses the assembly part 234 to connect with the second assembly. The hole 252 is pivotally connected and the third assembly hole 253 is pivotally connected to the guide groove 281 by using the assembly member 234. The assembly member 234 is movable in the guide groove 281, and the assembly portion 271 and the third assembly part 271 are pivotally connected. A group of holes 251 are assembled correspondingly. Since the second fastener 27 is covered with the elastic element 273, one end of the elastic element 273 is against the resisting portion 274, and the other end of the elastic element 273 is against the stopper. On the part 261, the second fastener 27 utilizes the strong elastic force of the elastic element 273 to make the second The other part of the fastening member 27 is disposed in the second hole 42. When the user pulls the retraction member 24, he will move the connecting member 25 through the assembly hole 242. The connecting member 25 passes through the guide groove 281. The second fastener 27 will be driven forward in a linear motion to move in the first through hole 26 and the elastic element 273 will be compressed until the second fastener 27 is completely separated from the second hole 42, and further, The gun body 4 has the slot 43 at the inner top position. The slot 43 extends toward one side of the gun body 4 and is formed with the expanded portion 431 and the narrow portion 432 respectively. The seat 31 passes through the expanded portion 431 and the annular groove 32 passes through the narrow portion 432 to set the barrel 3 in the slot 43. In summary, when the user pulls the brake 24 upward, it will The push piece 23 moves backward and the push portion 231 will resist the slot 43. At the same time, the connecting piece 25 will move forward in a linear motion to drive the second fastener 27 out of the second hole 42. The user then The first fastener 21 disposed in the first hole 41 can be used as a supporting point to rotate the gun barrel 2 so that the base 31 passes through the expanded portion 431 and the annular groove 32 passes through the narrow portion 432 . The barrel 3 is disengaged from the slot 43. Since the recess 212 is locked on the catch portion 411, the barrel body 2 is continuously rotated so that the cut portion 211 can pass through the catch portion in a aligned manner. 411 and the recess 212 is no longer limited to the clamping portion 411, the first clamping member 21 can be pulled out of the first hole 41 to quickly and easily separate the gun chamber 2 and the gun barrel 2. The disassembly action of the gun barrel 3 and the gun body 4. In addition, the user can use the first fastener 21 provided in the first hole 41 as a support point to rotate the gun chamber 2. The bullet head 272 is disposed on the arc groove 44 during the rotation of the gun body 2. The arc groove 44 is located at one side of the gun body 4 and gradually expands from the inside to the outside. , the shape of the arc groove 44 can completely fit the bullet head 272. At this time, the gun chamber 2 and the The barrel 3 rests on the gun body 4 at an inclined angle to facilitate the user to withdraw a firing object from the barrel 3 and reload the firing object.

The gun chamber device 1 of the invention includes: the gun chamber body 2, the gun barrel 3 and the gun body 4. The gun chamber body 2 has an inner bottom end position. The first fastener 21 and the second fastener 27 are partially disposed in the first through hole 26, and the gun barrel 3 is disposed in the second through hole 29, and the gun body 4 is in There is the first hole 41 at the inner bottom position, and the first hole 41 has the catch portion 411 at the upper end. The cut portion 211 passes through the catch portion 411 in a flush manner and seals the recessed portion. 212 is clamped on the clamping portion 411, so that the first fastener 21 is disposed in the first hole 41, and the gun body 4 has the second hole 42 at the inner middle position, And the second fastener 27 is disposed in the second hole 42, and the gun body 4 has the slot 43 at the inner top position, and the slot 43 faces the side of the gun body 4. The extended openings at the edges are respectively formed with the expanded portion 431 and the narrow portion 432. The base 31 passes through the expanded portion 431 and the annular groove 32 passes through the narrow portion 432 so that the gun barrel 3 is placed in the slot 43. , so that the gun chamber 2, the gun barrel 3, and the gun body 4 can be assembled correspondingly to each other, and the pusher 23 is pivotally connected to the pusher 23 through the assembly member 234 through the retraction member 24. And the pushing member 23 can move on the guide rail 22, and the braking member 24 uses the assembly member 234 to pivot to the connecting member 25, and the connecting member 25 uses the assembly member 234 to pivot to the fixing member 28. Use When the user pulls the retraction member 24 upward, the pushing member 23 will move backward and the pushing part 231 will resist the slot 43. At the same time, the connecting member 25 will move forward in a linear motion to drive the second fastening member 27 away from the In the second hole position 42, the first fastener 21 is used as a supporting point to rotate the barrel body 2, so that the base 31 passes through the expanded portion 431 and the The ring groove 32 separates the gun barrel 3 from the slot 43 through the narrow portion 432, and the cut portion 211 can pass through the catch portion 411 in a flush manner and the recess 212 is no longer limited to the catch portion 411. , the first fastener 21 can be pulled out of the first hole 41 to complete the disassembly action of quickly and easily separating the gun chamber 2, the gun barrel 3 and the gun body 4. , in addition, the user can set the bullet head 272 on the arc groove 44 during the rotation of the barrel body 2, because the barrel body 2 and the barrel 3 stay at an inclined angle. The gun body 4 is convenient for the user to withdraw a firing object from the gun barrel 3 and reload the firing object.

The above-mentioned embodiments are used to illustrate one of the best possible embodiments of this invention, and are not intended to limit the scope of this invention. Anyone familiar with this art can make some modifications without departing from the spirit and scope of this invention. Therefore, the scope of protection of this creation shall be subject to the scope of the patent application attached.

1: Gun chamber device

2: Gun chamber body

21:First card firmware

211:cut part

212: concave part

22: Guide rail

23: Pushing parts

231: Pushing part

232:Reception Department

233:Trough rail

234:Assemblies

24:Return parts

241: Turning point

242: Assembly hole

25: Connector

251: The first set of holes

252: The second set of holes

253: The third set of holes

26: First piercing

27: Second card firmware

271:Assembly and connection department

272: Warhead

273: Elastic element

274: Arrival

28: Fasteners

281:Guide trough

29: Second piercing

3: Barrel

31:Hangzuo

32: Ring groove

4: Gun body

43:Slot

431:Expansion

432: Narrow part

44: Arc groove

Claims (11)

A quick-detachable gun chamber device, which includes: A gun chamber body, the gun chamber body has a first fastener at the inner bottom position, the first fastener is formed with a cut portion on one end edge, and a side edge is formed adjacent to the cut portion The recessed portion is formed with a guide rail on one side of the gun barrel, and a push piece is provided on the guide rail. One end of the push piece is formed with a push portion and the other end is formed with a connecting portion, and the push piece There are a plurality of grooved rails on the plurality of grooved rails. Each of the plurality of grooved rails uses a set of connectors to pivot the pusher on the barrel body. A turning part is pivotally connected, one end of the retraction member has a set of connection holes, and the set connection hole is pivotally connected to a second set hole at one end of a connecting piece by using the assembly piece, and the connecting piece is at There is a first assembly hole at the central position, and the connector has a third assembly hole at the other end relative to the second assembly hole, and the gun barrel is at the inner middle end position. There is a first through hole, a second fastener is partially disposed in the first through hole, the second fastener has a set of connecting parts formed on one end edge and a bullet head formed on the other end edge, and the set connecting part The part can be assembled correspondingly with the first assembly hole, and an elastic element is sleeved on the second fastener, and the barrel body is provided with a fixing piece at the other side position, The fixing member has a guide groove at the inner center position, the third assembly hole is pivotally connected to the guide groove by using the assembly member, and the gun barrel body has a second assembly hole at the inner top position. perforation; A gun barrel, the gun barrel is arranged in the second through hole, and the gun barrel is formed with a base on one end edge, and an annular groove is formed on one side of the base; A gun body, the gun body has a first hole at the inner bottom position, the first fastener is disposed in the first hole, and the gun body has a first hole at the inner middle position. There is a second hole on the second fastener, and the elastic element is set on the second fastener, and the second fastener can The strong elastic force of the elastic element is used to cause the other part of the second fastener to be disposed in the second hole position, and the gun body has a slotted hole at the inner top position, and the slotted hole faces the The extending openings on one side of the gun body are respectively formed with an expanded portion and a narrow portion. The base is disposed in the slot through the expanded portion and the annular groove is disposed in the slot through the narrow portion, thereby making the The gun chamber body, the gun barrel and the gun system can be assembled corresponding to each other, and the gun body has an arc groove on one side. The quick-release gun chamber device described in item 1 of the patent application, wherein the plurality of groove rails are arranged longitudinally on the pusher, and the plurality of groove rails are pivotally provided with the assembly member , so that the push piece can move on the guide rail. For example, in the quick-detachable barrel device described in item 1 of the patent application, the recoil brake is slightly in the shape of an "L". For example, in the quick-release gun chamber device described in item 1 of the patent application, a stopper is formed on one end of the first through hole, and one end of the elastic element is against the stopper. For the quick-release gun chamber device described in item 1 of the patent application, the second fastening member has a resisting portion, and the other end of the elastic element resists the resisting portion. For example, in the quick-release gun chamber device described in item 1 of the patent application, the assembly component is movable in the guide groove. For example, in the quick-release rifle chamber device described in Item 1 of the patent application, the first hole has a catch portion at the upper end, and the cut portion passes through the catch portion in a flush manner and locks the recessed portion. Located on the card part. For example, in the quick-release rifle chamber device described in item 1 of the patent application, the expanded portion is located inside the slot and the narrow portion is located outside the slot. The quick-release gun chamber device described in item 1 of the patent application, wherein the arc groove gradually expands from the inside to the outside and is located in the gun body between the first hole position and the second hole position. one side At the edge, the warhead can be adapted to be arranged on the arc groove. The quick-release rifle chamber device described in item 1 of the patent application, wherein the assembly hole is pivotally connected to the second assembly hole using the assembly member, and the third assembly hole is pivotally connected to the second assembly hole using the assembly member. The guide groove is pivotally connected, and the assembly portion is correspondingly assembled with the first assembly hole. When the retraction member is pulled upward, the connecting member will drive the second fastener forward in a linear motion to move in the third A hole is drilled and separated from the second hole. For example, the quick-detachable barrel device described in item 1 of the patent application, wherein the connecting part is pivotally connected to the turning part using the assembly part, and pulling the braking part upward will simultaneously drive the pushing part to move backward. And the pushing part will resist the slot.

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