TWM524373U - Latch - Google Patents

Description

Latch

The present invention relates to a latch, and more particularly to a latch having an anti-theft latch function, which is not removed by an external force into the housing when the anti-theft latch is retracted into the housing of the latch.

According to the conventional latch, when the anti-theft latch is pressed to the bottom, the internal locking mechanism is interlocked, so that the latch head is jammed, and the latch head is not returned to the housing when the latch is pressed by an external force. In order to improve the anti-theft property, however, due to the structural features of the conventional carding mechanism, the required cost is high, and the component structure is relatively complicated. In view of this, the present invention provides a latch having an anti-theft latch function and a structure. It is simpler and can effectively reduce costs.

The main purpose of the present invention is to provide a latch having a tamper-proof function and a simple structure. When the burglar-proof latch is retracted into the housing of the latch, the latch head is not pulled into the housing by an external force.

The present invention relates to a latch comprising: a housing; an anti-theft latch head partially mounted to the housing, the anti-theft latch head having a projection; an anti-theft latching plate mounted to the housing, the anti-theft latching plate having a closed hollow portion and a resisting portion having a first portion and a second portion; a latch head partially mounted to the housing, the latch head having a stop portion; a latch a head plate, one end of which is coupled to the latch head; when the anti-theft latch head and the latch head When the portion is partially extended from the housing, the protrusion of the anti-theft latch head abuts against the first portion of the hollow portion of the anti-theft latch plate, when the anti-theft latch head is located completely retracted into the housing, When the latch head is in a position partially protruding from the housing, the projection of the anti-theft latch head abuts against the second portion of the hollow portion of the anti-theft latch plate.

The present invention relates to a latch comprising: a housing; an anti-theft latch head partially mounted to the housing, the anti-theft latch head having a projection; an anti-theft latching plate mounted to the housing, the anti-theft latching plate having a closed hollow portion, a resisting portion and a first abutting portion, the hollow portion having a first portion and a second portion, the first portion and the second portion having a height difference; a latch head, a portion Mounted in the housing, the latch head has a stop portion; a latch head plate having one end connected to the latch head, the latch head plate having at least one pushed portion; a drive plate mounted to the case The drive plate has at least one driving portion; a de-locking plate is mounted on the housing to partially receive the portion of the transmission plate, the de-lapping plate having at least one driven portion and at least one pushing portion; When the anti-theft latch and the latch are located at a position partially extending from the housing, the protrusion of the anti-theft latch abuts against the first portion of the hollow portion of the anti-theft latch plate, the first of the anti-theft latch The abutment portion is not adjacent to the unlatching plate, and when the anti-theft latch head is located completely retracted into the housing, When the latch head is in a position partially protruding from the housing, the protrusion of the anti-theft latch head abuts the second portion of the hollow portion of the anti-theft latch plate, and the first abutment portion of the anti-theft latch plate abuts Disassembling the driving plate, causing the driving plate to drive at least one driving portion of the driving plate to drive at least one driven portion of the unlatching plate, and at least one pushing portion of the unlatching plate pushes at least one of the latching plate The pushing portion, the abutting portion of the anti-theft latching plate and the stopping portion of the latching head are not aligned, and the latching head can be driven to be unloaded and unlatched.

The present invention relates to a latch comprising: a housing; an anti-theft latch head partially mounted to the housing The anti-theft latch has a convex portion, and a protrusion is extended on the convex portion; an anti-theft latch plate is mounted on the housing, the anti-theft latch plate has a closed hollow portion, a resisting portion, and a first portion An abutting portion and a second abutting portion, the hollow portion having a first portion and a second portion, the first portion having a width narrower than a width of the second portion; a first elastic member, the first elastic member One end is supported by the anti-theft latch head, and the other end is supported by the anti-theft latch plate; a latch head is partially mounted to the housing, the latch head has an end portion having a stop portion, the anti-theft latch The convex portion of the head may be adjacent to the end of the latch head; a latch head plate having one end connected to the latch head, the latch head plate having two spaced apart protrusions, the latch head plate Each of the two protrusions is formed with a pushing portion; a driving plate is mounted on the housing, and the driving plate has two spaced apart protrusions, and the two protruding blocks of the driving plate respectively form a driving portion; a plate mounted on the housing for partially accommodating a portion of the drive plate, the release plate having two driven And the two pushing portions; when the anti-theft latch head and the latching head are both located at a position partially protruding from the housing, the protrusion of the anti-theft latching head is located at a first portion of the hollow portion of the anti-theft latching plate, The first abutment portion of the anti-theft latch plate is not adjacent to the de-luck plate, and the anti-theft latch is located when the anti-theft latch head is completely retracted into the housing, and the latch head is located at a position partially protruding from the housing a bump of the head is located at a second portion of the hollow portion of the anti-theft latch plate, the first abutment portion of the anti-theft latch plate abuts against the unlatching plate; as the drive plate is actuated, the two driving portions of the drive plate are The two driven portions of the unlatching plate are respectively driven, and the two pushing portions of the unlatching plate respectively push the two pushed portions of the latching plate, and the unlatching plate abuts the second abutting portion of the anti-theft latch plate. The abutment portion of the anti-theft latch plate is not aligned with the stop portion of the latch head, and the latch head can be driven to be unloaded and unlatched.

1‧‧‧ latch

10‧‧‧shell

11‧‧‧Baffle

12‧‧‧Cylinder

121‧‧‧ convex

13‧‧‧First cover

14‧‧‧second cover

141‧‧‧Extension

2‧‧‧Anti-theft latch set

21‧‧‧Anti-theft latch

210‧‧‧ convex

211‧‧‧Bumps

212‧‧‧ rods

213‧‧‧End

22‧‧‧First elastic element

23‧‧‧Anti-theft latch plate

231‧‧‧ first board

232‧‧‧ second board

233‧‧‧篓空部

234‧‧‧Part I

235‧‧‧Part II

236‧‧‧Resistance

237‧‧‧The first adjacent part

238‧‧‧second adjacent department

239‧‧ holes

3‧‧‧Lock head set

31‧‧‧Lock head

310‧‧‧End

311‧‧‧stop

32‧‧‧Lock head plate

321‧‧‧Bumps

322‧‧‧Pushing Department

323‧‧‧ neck

4‧‧‧Transmission mechanism

41‧‧‧Adjustment board

411‧‧‧ first board

412‧‧‧ second board

413‧‧‧ third board

414‧‧‧First cam hole

415‧‧‧Second cam hole

42‧‧‧First Cam

421‧‧‧The first mover

422‧‧‧Flange

43‧‧‧second cam

431‧‧‧The second dialing department

432‧‧‧Flange

44‧‧‧ drive plate

441‧‧‧Extension

442‧‧‧Bumps

443‧‧‧Drive Department

444‧‧‧The Ministry of Command

445‧‧‧U-shaped slot

45‧‧‧Unloading plate

451‧‧‧ Groove

452‧‧‧Driven Department

453‧‧‧Promotion Department

46‧‧‧Second elastic element

Figure 1 is a perspective view of the preferred embodiment of the present invention showing the latch.

FIG. 2 is a schematic plan view showing a preferred embodiment of the present invention, showing the anti-theft latch head of the latch and the latch head simultaneously extending out of the housing.

FIG. 3 is a schematic diagram showing the planar combination of the anti-theft latch of the latch retracted into the housing and the latch head extending out of the housing.

4 is a schematic diagram showing the planar combination of the first cam or the second cam of the latch being operated to retract the anti-theft latch and the latch head into the housing at the same time as a preferred embodiment of the present invention.

FIG. 5 is a perspective view showing the burglar-proof latch head according to a preferred embodiment of the present invention.

Figure 6 is a perspective view of the preferred embodiment of the present invention showing the latch head.

As shown in FIG. 1 , in order to create a preferred embodiment of the latch, the latch 1 includes a housing 10 , an anti-theft latch set 2 , a latch head set 3 , a transmission mechanism 4 , and the like. element. The housing 10 includes a baffle 11, a cylinder 12, a first cover plate 13 and a second cover plate 14. The inner wall of the tubular body 12 extends inwardly with a convex portion 121. The first cover The plate 13 is engaged with the second cover plate 14. One end of the first cover plate 13 and the second cover plate 14 are mounted on one end of the barrel 12 of the housing 10, and the baffle 11 is mounted on the tube At the other end of the body 12, the second cover 14 has an extension 141.

As shown in FIG. 1 , FIG. 2 , FIG. 4 and FIG. 5 , the anti-theft latch set 2 is mounted in the housing 10 and includes: an anti-theft latching head 21 , a first elastic component 22 and an anti-theft latching plate 23 . The anti-theft latch 21 has a convex portion 210 on the side of the anti-theft latch 21, and a protrusion 211 (shown in FIG. 2 and FIG. 3) is extended on the convex portion 210. One end of the anti-theft latch 21 is mounted with a rod 212. Approximate cylinder), The end of the rod 212 has an end portion 213. The anti-theft latch 21 can be moved between a position retracted into the housing 10 and a portion extending from the housing 10. The anti-theft latch plate 23 has two vertical positions. a first plate 231 and a second plate 232, a hollow portion 233 is formed in the center of the first plate 231, a resisting portion 236 is formed at the front end, and two adjacent first abutting portions 237 are disposed on one side (in this case, a recessed portion and a second abutting portion 238, the hollow portion 233 is a closed region having a first portion 234 and a second portion 235, as shown in FIG. 2, wherein the height ratio of the first portion 234 is The height of the second portion 235 is high, and the height difference is generated. The protrusion 211 of the anti-theft latch 21 is received in the hollow portion 233 of the anti-theft latch plate 23, and a hole 239 is formed in the second plate 232. The end portion 213 of the rod 212 of the latch 21 can pass through the hole 239 of the second plate 232 of the anti-theft latch plate 23 and be mounted to the inner bottom of the barrel 12 of the housing 10, and the first elastic member 22 is mounted thereon. The rod 212 of the anti-theft latch 21 has one end abutting against the anti-theft latch 21 and the other end abutting against the second plate 232 of the anti-theft latch plate 23, when the anti-theft latch 21 is moved from a position extending from the housing 10 to a position retracted into the housing 10, and the projection 211 is moved from the first portion 234 of the hollow portion 233 of the anti-theft latch plate 23 to the second portion in a timely manner. 235, the second plate 232 of the anti-theft latch plate 23 is biased by the first elastic member 22, and the first plate 231 of the anti-theft latch plate 23 is biased.

As shown in FIG. 1 , the latch head set 3 includes a latch head 31 and a latch head plate 32 , and the latch head 31 can be located at a position retracted into the housing 10 and partially protrude from the housing 10 . The latch head 31 has an end portion 310. One end of the latch head plate 32 is fixed to the latch head 31 and has a neck 323. The latch head plate 32 abuts the neck 323. One end has two spaced apart protrusions 321 , and each of the protrusions 321 respectively defines a pushed portion 322 . The anti-theft latch set 2 is mounted on the latch head set 3 , and the convex portion of the anti-theft latch head 21 One end of 210 can be reached The anti-theft latch plate 23 is received between the two protrusions 321 of the latch head plate 32. The end portion 310 of the latch head 31 has a stop portion 311.

As shown in FIG. 1 , the transmission mechanism 4 includes an adjustment plate 41 , a first cam 42 , a second cam 43 , a drive plate 44 , a release plate 45 and a second elastic component 46 . The board 41 has a first board 411, a second board 412 and a third board 413. The first board 411 and one end of the second board 412 are connected by the third board 413. The first board 411 has a first cam hole 414, the second plate 412 has a second cam hole 415, the first cam 42 has two first dial portions 421 and a flange 422, the second cam 43 has two second dials The first cam 42 and the second cam 43 are partially mounted between the first plate 411 and the second plate 412 of the adjusting plate 41, respectively, and the flange of the first cam 42 422 passes through the first cam hole 414 of the adjusting plate 41, the flange 432 of the second cam 43 passes through the second cam hole 415 of the adjusting plate 41, and the adjusting plate 41 is mounted on the first cover plate 13 and the Between the second cover plate 14 , the end of the drive plate 44 has an extending portion 441 . The extending portion 441 extends from each side of a protrusion 442 . The other end of the drive plate 44 has a U-shaped slot 445 . The two sides of the transmission plate 44 have a driving portion 443. The other end of the driving plate 44 is mounted on the second plate 412 of the adjusting plate 41. Between the second cam 43, the U-shaped groove 445 of the driving plate 44 passes through the flange 432 of the second cam 43, the two first dialing portions 421 of the first cam 42 and the second cam 43 The two second dialing portions 431 are adjacent to the two driven portions 444 opposite to the driving plate 44 according to the different wheelbases of the latches. The latching head plate 32 is mounted on the driving plate 44, and the unlatching is performed. The plate 45 is a circular plate having a recess 451 in the center, an extension portion 141 of the second cover plate 14, an extension portion 441 of the transmission plate 44, a neck portion 323 of the latch head plate 32, and the anti-theft latch The head 21 and the anti-theft latching plate 23 are received in the recess 451. The two sides of the edge of the recess 451 respectively form a driven portion 452 (which is a flange) on one side and a pushing portion 453 on the other side. One end of the second elastic member 46 is received by the latch head 31 , and the other end is sleeved on the extending portion 441 of the driving plate 44 and abuts against the two protrusions 442 .

As shown in FIG. 1 to FIG. 4, after the latch 1 is integrally assembled, when the latch head 31 and the anti-theft latch 21 are both partially extended from the housing 10, the bump of the anti-theft latch 21 is 211 is located in the first portion 234 of the hollow portion 233 of the anti-theft latching plate 23, the resisting portion 236 of the anti-theft latching plate 23 is not aligned with the first position of the stopping portion 311 of the latching head 31, and the anti-theft latch The first abutment portion 237 of the plate 23 does not abut the delatcer plate 45.

As shown in FIGS. 1 and 3, when the door is closed, the anti-theft latch 21 is pushed and fully retracted into the housing 10, and the projection 211 of the anti-theft latch 21 follows the first portion 234 located at the hollow portion 233. Moving to the second portion 235, since the height of the second portion 235 is lower than the first portion 234, the anti-theft latch plate 23 is biased by an angle by the bias of the first elastic member 22, so that the anti-theft latch plate The resisting portion 236 of the latch 23 is located at a second position facing the stop portion 311 of the latch head 31, and the first abutment portion 237 of the anti-theft latching plate 23 abuts against the unlatching plate 45 if the latching head 31 When the external force is intended to be withdrawn into the casing 10, the stopper portion 311 of the latch head 31 may hit the abutting portion 236 of the anti-theft latch plate 23, so that the latch head 31 cannot be unloaded.

As shown in FIG. 1 and FIG. 4, when the latch is to be unlatched, the first cam 42 or the second cam 43 is rotated, and the first toggle portion 421 of the first cam 42 or the second toggle of the second cam 43 is rotated. The portion 431 of the drive plate 44 moves the direction of the drive plate 44 away from the baffle 11, and the two driving portions 443 of the drive plate 44 respectively drive the two unlatching plates 45. The driven portion 452 is configured such that one end of the unlatching plate 45 is contiguous with the convex portion 121 of the cylindrical body 12 The angular displacement swing causes the unlatching plate 45 to move from a position adjacent to the first abutment portion 237 of the anti-theft latch plate 23 to a position adjacent to the second abutment portion 238, at which time the anti-theft latch plate 23 Returning to the first position where the resisting portion 236 is not aligned with the stopper portion 311 of the latching head 31, that is, the stopper portion 311 of the latching head 31 does not touch the anti-theft latch plate 23 when moving. The urging portion 236 of the decoupling plate 45 pushes the two pushed portions 322 of the latch head plate 32 respectively, so that the latch head 31 is retracted into the housing 10 to achieve unlatching.

However, the above-mentioned sections of the present invention are only preferred embodiments of the present invention, and are not intended to limit the implementation of the present invention, and are generally based on the structural features and spirit described in the following patent application scope. Validity replacement or modification shall be included in the scope of this patent.

1‧‧‧ latch

10‧‧‧shell

11‧‧‧Baffle

12‧‧‧Cylinder

121‧‧‧ convex

13‧‧‧First cover

14‧‧‧second cover

141‧‧‧Extension

2‧‧‧Anti-theft latch set

21‧‧‧Anti-theft latch

210‧‧‧ convex

212‧‧‧ rods

213‧‧‧End

22‧‧‧First elastic element

23‧‧‧Anti-theft latch plate

231‧‧‧ first board

232‧‧‧ second board

233‧‧‧篓空部

234‧‧‧Part I

235‧‧‧Part II

236‧‧‧Resistance

237‧‧‧The first adjacent part

238‧‧‧second adjacent department

239‧‧ holes

3‧‧‧Lock head set

31‧‧‧Lock head

310‧‧‧End

311‧‧‧stop

32‧‧‧Lock head plate

321‧‧‧Bumps

322‧‧‧Pushing Department

323‧‧‧ neck

4‧‧‧Transmission mechanism

41‧‧‧Adjustment board

411‧‧‧ first board

412‧‧‧ second board

413‧‧‧ third board

414‧‧‧First cam hole

415‧‧‧Second cam hole

42‧‧‧First Cam

421‧‧‧The first mover

422‧‧‧Flange

43‧‧‧second cam

431‧‧‧The second dialing department

432‧‧‧Flange

44‧‧‧ drive plate

441‧‧‧Extension

442‧‧‧Bumps

443‧‧‧Drive Department

444‧‧‧The Ministry of Command

445‧‧‧U-shaped slot

45‧‧‧Unloading plate

451‧‧‧ Groove

452‧‧‧Driven Department

453‧‧‧Promotion Department

46‧‧‧Second elastic element

Claims (14)

A latch includes: a housing; an anti-theft latch head partially mounted to the housing, the anti-theft latch head having a protrusion; an anti-theft latch plate mounted to the housing, the anti-theft latch plate having a closure a hollow portion and a resisting portion, the hollow portion having a first portion and a second portion; a latch head partially mounted to the housing, the latch head having a stop portion; a latch head plate One end is connected to the latch head; when the anti-theft latch head and the latch head are both located at a position partially protruding from the housing, the protrusion of the anti-theft latch head abuts against the hollow portion of the anti-theft latch plate In part, when the anti-theft latch head is located at a position completely retracted into the housing, the latch head is located at a position partially protruding from the housing, and the protrusion of the anti-theft latch head abuts against the hollow of the anti-theft latch plate The second part of the department. The latch of claim 1, wherein the anti-theft latch is when the anti-theft latch is pushed and fully retracted into the housing, the latch head being in a position partially extending from the housing The abutment portion is located at a position that opposes the stop of the latch head. The latch of claim 2, wherein the anti-theft latch plate further has a first plate and a second plate disposed vertically, the central portion of the first plate enclosing the hollow portion One end of a first elastic member abuts against the anti-theft latch head, and the other end abuts against the second plate. The latch of claim 3, wherein, further, the first plate of the anti-theft latch plate has the first abutment portion and a second abutment portion, and when the latch is unlatched, a disengagement plate abuts At the second abutment portion of the anti-theft latch plate, the abutment portion of the anti-theft latch plate is unaligned with the stop portion of the latch head, and the latch head can be driven to be unloaded and unlatched. The latch of claim 1, wherein the first portion of the hollow portion of the anti-theft latch plate has a height difference from the second portion. A latch includes: a housing; an anti-theft latch head partially mounted to the housing, the anti-theft latch head having a protrusion; an anti-theft latch plate mounted to the housing, the anti-theft latch plate having a closure a hollow portion, a resisting portion and a first abutting portion, the hollow portion having a first portion and a second portion, the first portion having a height difference with the second portion; a latch head partially mounted on the The latch head has a stop portion; a latch head plate having one end connected to the latch head, the latch head plate having at least one pushed portion; a drive plate mounted to the housing The drive plate has at least one driving portion; a de-locking plate is mounted on the housing to partially receive the portion of the transmission plate, the de-lapping plate having at least one driven portion and at least one pushing portion; When the head and the latch head are both in a position partially protruding from the housing, the protrusion of the anti-theft latch head abuts against the first portion of the hollow portion of the anti-theft latch plate, and the first abutment of the anti-theft latch plate The portion is not adjacent to the unlatching plate, and when the anti-theft latch is located completely retracted into the housing, When the latch head is in a position partially protruding from the housing, the protrusion of the anti-theft latch head abuts the second portion of the hollow portion of the anti-theft latch plate, and the first abutment portion of the anti-theft latch plate abuts Disassembling the driving plate, causing the driving plate to drive at least one driving portion of the driving plate to drive at least one driven portion of the unlatching plate, and at least one pushing portion of the unlatching plate pushes at least one of the latching plate The pushing portion, the abutting portion of the anti-theft latching plate and the stopping portion of the latching head are not aligned, and the latching head can be driven to be unloaded and unlatched. The latch of claim 6, wherein the anti-theft latch is when the anti-theft latch is pushed and fully retracted into the housing, the latch head being in a position partially extending from the housing The abutment portion is located at a position that opposes the stop of the latch head. The latch of claim 7, wherein, further, the anti-theft latch plate has a first plate and a second plate disposed vertically, the central portion of the first plate enclosing the hollow portion One end of a first elastic member abuts against the anti-theft latch head, and the other end abuts against the second plate. The latch of claim 8, wherein, further, the first plate of the anti-theft latch plate has the first abutting portion and a second abutting portion, and the unlatching plate abuts when unlatching At the second abutment portion of the anti-theft latch plate, the abutment portion of the anti-theft latch plate is unaligned with the stop portion of the latch head, and the latch head can be driven to be unloaded and unlatched. The latch of claim 6, wherein, further, the unlatching plate is a circular plate having a groove in the center, the drive plate having an extension, the latch plate having a neck The extension of the drive plate and the neck of the latch head plate are received in the recess. The latch of claim 10, wherein, further, the latch head plate has two spaced apart lugs, and the pushed portion is formed on the bump of the latch head plate. The latch of claim 11, wherein, further, the drive plate has two spaced apart projections, the driven portion being formed on the projection of the drive plate. The latch of claim 6, wherein, further, the driven portion of the unlatching plate is a flange. A latch includes: a housing; an anti-theft latch head partially mounted to the housing, the anti-theft latch head having a convex portion, a protrusion extending from the convex portion; and an anti-theft latch plate mounted to the housing The anti-theft latching plate has a closed hollow portion, a resisting portion, a first abutting portion and a second abutting portion, the hollow portion having a first portion and a second portion, the first portion a width narrower than the width of the second portion; a first elastic member, one end of the first elastic member supported by the anti-theft latch head, and the other end supported by the anti-theft latch plate; a latch head partially mounted to the housing The latch head has an end portion having a stop portion, the convex portion of the anti-theft latch head being timely adjacent to the end of the latch head; a latch head plate having one end connected to the latch a head, the latch head plate has two spaced apart protrusions, and the two protrusions of the latch head plate respectively form a pushed portion; a drive plate is mounted on the housing, and the drive plate has two spaced apart portions a bump, a driving portion is formed on each of the two bumps of the driving plate; The housing is partially accommodating a portion of the drive plate, the decoupling plate having two driven portions and two pushing portions; when the anti-theft latch and the latch are located at a position partially protruding from the housing a bump of the anti-theft latch head is located at a first portion of the hollow portion of the anti-theft latch plate, the first abutment portion of the anti-theft latch plate is not adjacent to the unlatching plate, when the anti-theft latch head is completely retracted a position of the housing, the latch head being located at a position partially extending from the housing, the protrusion of the anti-theft latch head being located at a second portion of the hollow portion of the anti-theft latch plate, the first of the anti-theft latch plate The abutting portion abuts the decoupling plate; as the driving plate is actuated, the two driving portions of the driving plate respectively drive the two driven portions of the unlatching plate, and the two pushing portions of the unlatching plate respectively push the latching head Two pushed portions of the plate, the unlatching plate abuts the second abutting portion of the anti-theft latch plate, the resisting portion of the anti-theft latch plate is not aligned with the stop portion of the latch head, and the latch head is Was driven to withdraw and unlatch.