CN209958973U

CN209958973U - Automatic lock-control bolt

Info

Publication number: CN209958973U
Application number: CN201922096086.3U
Authority: CN
Inventors: 吕金辉; 胡志成
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-06
Filing date: 2019-11-29
Publication date: 2020-01-17
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to the technical field of door and window locksets, specifically disclose an automatic lock-control bolt, including lock shell, the flexible subassembly that moves relative lock shell and install the insurance subassembly on the lock shell, flexible subassembly includes swing piece, last transmission piece and lower transmission piece, swing piece one end is connected with last transmission piece transmission through arch and recess, and the transmission piece reciprocates on the control, and the swing piece other end is connected with last transmission piece transmission through arch and recess that one end is the breach form, only controls lower transmission piece and upwards moves; the safety assembly comprises a supporting frame and a bolt, wherein the supporting frame is in sliding connection with the lock shell, and the bolt is arranged at the outer end of the supporting frame. Compared with bidirectional linkage, the upper transmission piece and the lower transmission piece in the telescopic assembly are linked in a unidirectional mode, when the door is closed, the lock cannot scratch the floor or the doorsill, the attractiveness of the floor or the doorsill cannot be influenced, and the service life of the lock can be prolonged; and the automatic lock control bolt can be used under the condition of the existence of the threshold, and has wide application range.

Description

Automatic lock-control bolt

Technical Field

The utility model belongs to the technical field of door and window tool to lock, in particular to automatic lock accuse bolt.

Background

The split-type doors on the market can be selected to open only one door or two doors at the same time, and the matched lockset comprises a main lockset and an auxiliary lockset (also called an automatic lock-control bolt). The automatic lock control bolt is provided with a safety component matched with the main lock, a top lock and a ground lock. When the split door needs to be closed, the lock tongues of the top lock and the ground lock are retracted and then aligned with the bolt insertion holes in the door frame or the floor to be inserted, the auxiliary lock door is fixed, and then the main lock door is closed. Although the top lock and the ground lock of the more advanced automatic lock control bolt in the market can be controlled by the same connecting rod (handle) together, the door can be opened or closed both inside and outside the door, and the two doors can be conveniently and quickly opened or closed (as in patent 201720782369.1), but the top and bottom of the top lock and the bottom lock are in linkage control, when the door is closed, the ground lock can scrape the floor or the doorsill, scratches can be left after long-term use, the attractiveness of the floor or the doorsill can be influenced, and the service life of the lockset can also be influenced. Meanwhile, the lockset is generally required to be matched with a threshold for reducing scratches, and the application range is limited. In addition, the automatic lock control bolt needs to be provided with an additional locking device, so that the automatic lock control bolt has multiple accessories and is complicated to operate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provide an automatic lock control bolt which is more convenient to operate.

In order to achieve the above object, the present invention provides an automatic lock control bolt, which comprises a lock case, a telescopic component moving relative to the lock case, and a safety component arranged on the lock case,

the telescopic assembly comprises a swinging piece, an upper transmission piece and a lower transmission piece, wherein a rotating shaft hole is formed in the swinging piece, a rotating shaft connector is arranged at the rotating shaft hole, one end of the swinging piece is in transmission connection with the upper transmission piece through a protrusion and a groove and is used for controlling the upper transmission piece to move up and down, the other end of the swinging piece is in transmission connection with the upper transmission piece through a protrusion and a groove with one end in a notch shape, and only the lower transmission piece is controlled to move up; a tension spring is arranged between the lower transmission piece and the lock shell, and a first convex positioning piece is arranged on one side of the lower transmission piece;

the safety assembly comprises a support frame connected with the lock shell in a sliding manner and a lock tongue arranged at the outer end of the support frame, a through groove for the lower transmission piece to penetrate through is formed in the bottom of the support frame, and a return spring is further arranged between the support frame and the shell or a shell accessory;

when the door is opened, the support frame and the lock tongue move towards the outer side of the lock shell under the action of the return spring; the rotating shaft connector is manually rotated, the swinging sheet drives the upper transmission sheet to retract downwards, and meanwhile, the lower transmission sheet is driven to retract upwards; when the swinging piece rotates reversely, only the upper transmission piece is driven to extend outwards, and the first positioning piece on the lower transmission piece is clamped on the support frame to prevent the lower transmission piece from extending downwards; namely, under the door opening state, the lower transmission piece is in the contraction state, and the floor or the doorsill can not be scratched.

When closing the door, support frame and spring bolt are to the inboard removal of lock shell (after closing the door and reacing the assigned position, main lock touching spring bolt can drive support frame and spring bolt and remove to the lock shell outside), and first spacer breaks away from the support frame, and lower driving plate outwards stretches out under the effect of extension spring, and at this moment, the support frame blocks the upward movement of last driving plate, because the linkage effect of swing piece, also restricts lower driving plate rebound promptly simultaneously, and whole device is locked.

Preferably, one end of the swinging piece is provided with a groove, and the other end of the swinging piece is provided with a lug; the upper transmission piece is provided with a first protruding rod, the lower transmission piece is provided with a second protruding rod, the first protruding rod is arranged in the groove, and the second protruding rod is arranged on the upper side of the protruding piece. Alternatively, the two ends of the swing piece may be provided with protruding rods, the upper transmission piece may be provided with grooves, and the lower transmission piece may be provided with tabs (the tabs correspond to the grooves having a notch at one end).

Preferably, one end of the swinging piece is provided with sawteeth, and the other end of the swinging piece is provided with a lug; the upper transmission piece is provided with teeth matched with the sawteeth, the lower transmission piece is provided with a second protruding rod, and the second protruding rod is arranged on the upper side of the protruding piece. The saw-tooth connection of the swing plate and the upper transmission plate can refer to the structure of the 'a secondary lock device' (patent No. 201910003295.0).

Preferably, the lock tongue is connected with the support frame through a telescopic rod, and two ends of the support frame are respectively provided with a through hole; a fixing plate is also inserted into the lock shell on the inner side of the supporting frame, and a through hole for the telescopic rod to penetrate through is also formed in the fixing plate; the telescopic link runs through the perforation, the telescopic link outer end with link to each other with the spring bolt through screw thread or buckle, the telescopic link outside between stationary blade and the support frame front end is located to the return spring cover.

Preferably, the telescopic link is equipped with the separation blade far away from spring bolt one end, and the telescopic link outside cover between separation blade and the support frame end is equipped with the spring. Before the vice lock of installation, accessible external force compression separation blade and support frame end between the spring, then the direction of rotatory spring bolt to satisfy the installation demand. The automatic lock control bolt can meet the installation requirements of doors in different directions, such as the left side, the right side and the like, and has wide application range.

Preferably, the support frame comprises a first support sheet, a second support sheet, a third support sheet and a fourth support sheet which are vertically connected in sequence, the third support sheet is parallel to the plane where the lower transmission sheet is located, and the rest support sheets are perpendicular to the plane where the lower transmission sheet is located; the lock shell is provided with a transverse sliding groove, the first supporting sheet is arranged at one end far away from the lock tongue, the bottom of the first supporting sheet is provided with a sliding block matched with the transverse sliding groove, the through groove is arranged at the front part of the second supporting sheet, the through holes are respectively arranged on the first supporting sheet and the fourth supporting sheet, and the central connecting line of the two through holes is parallel to the plane where the lower transmission sheet is arranged; the first supporting plate is further provided with a through hole, and one side of the lower portion of the upper transmission plate is provided with a clamping block. When last drive plate and lower drive plate all retract to the lock shell, manually press the spring bolt, make spring bolt and support frame all move to the inboard, the fixture block of going up the drive plate passes the perforation and blocks on first support plate, and the drive plate locks promptly, because the linkage effect of swing plate, the drive plate also locks down, makes things convenient for the installation of this device. After the installation, the spring bolt is pressed manually again, so that the clamping block of the upper transmission piece is separated from the first supporting piece, and the upper transmission piece and the lower transmission piece are popped out of the lock shell. Need during the tool to lock installation with last transmission piece and lower transmission piece voltage-sharing withdrawal lock shell in, need compress fixedly with the hand during traditional installation with last transmission piece and lower transmission piece and install again complex operation.

Preferably, the inner side of the lower transmission piece is further provided with a second positioning piece in a protruding shape, the second positioning piece is located above the first positioning piece, the height of the second positioning piece protruding towards the inner side is larger than that of the first positioning piece, and when the lock tongue retracts inwards, the second positioning piece is clamped on the support frame to limit the downward movement amplitude of the lower transmission piece.

Preferably, a tension spring is hung between the upper transmission piece and the lock shell; a first longitudinal sliding groove is formed in the lock shell, and a first sliding block matched with the first longitudinal sliding groove is arranged on the upper transmission piece; a second longitudinal sliding groove is formed in the lock shell, and a second sliding block matched with the second longitudinal sliding groove is arranged on the lower transmission piece; the upper transmission piece is provided with a first limiting hole, and the first protruding rod penetrates through the first limiting hole and is connected with the first sliding block; and a second limiting hole is formed in the lower transmission sheet, and the second protruding rod penetrates through the second limiting hole and is connected with the first sliding block. The extension spring is arranged, so that the extension return of the upper transmission piece is facilitated. Two or more groups of the longitudinal sliding grooves can be arranged.

Preferably, the upper side and the lower side of one end, close to the lock tongue, of the support frame are respectively provided with a longitudinal partition, the longitudinal partition and the lock shell are encircled to form a hollow cuboid, the top and the bottom of the longitudinal partition are respectively provided with an insertion block, and the lock shell is provided with an insertion hole matched with the insertion block. The hollow cuboid surrounded by the longitudinal spacers and the lock shell is matched with the main lock. The longitudinal clapboard is inserted into the lock shell through the inserting block, so that the installation is convenient. Compare tradition through welded fastening, the installation accuracy is higher, and more is favorable to improving the packaging efficiency of device.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the upper transmission piece and the lower transmission piece in the telescopic assembly are linked in a single direction, and compared with the bidirectional linkage, when the door is closed, the lock cannot scratch the floor or the doorsill, the attractiveness of the floor or the doorsill cannot be influenced, and the service life of the lock can be prolonged; and the automatic lock control bolt can be used under the condition of the existence of the threshold, and has wide application range.

2. The safety assembly is simple in structure, few in accessories and convenient to install; meanwhile, the safety assembly has a locking function, before the automatic lock control bolt is installed, when the upper transmission piece and the lower transmission piece retract towards the lock shell, the spring bolt is manually pressed, the spring bolt and the support frame both move inwards, the clamping block of the upper transmission piece penetrates through the through hole and is clamped on the first support piece, namely the upper transmission piece is locked, and due to the linkage effect of the swinging piece, the lower transmission piece is also locked, so that the device is convenient to install; when closing the door, go up the rotor and all stretch out to the lock shell with lower rotor, at this moment, the rotor downstream was gone up in the support frame of insurance subassembly blockking, because the linkage effect of pendulum piece, also restrict simultaneously promptly and drive the rotor rebound down, whole device lock is dead, has improved the security of tool to lock.

3. This application is equipped with the spring through the telescopic link outside cover between separation blade and support frame end, before the vice lock of installation, accessible external force compression separation blade and the terminal spring between the support frame end, then the direction of rotatory spring bolt to satisfy the installation demand. The automatic lock control bolt can meet the installation requirements of doors in different directions, such as the left side, the right side and the like, and has wide application range.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic structural view of the back of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the extended state of the present invention.

Fig. 4 is a schematic diagram of the internal structure of the bidirectional retractable dead lock of the present invention.

Fig. 5 is a schematic view of the internal structure of the unidirectional contraction state of the present invention.

Fig. 6 is a schematic structural view of the swinging piece of the present invention.

Fig. 7 is a schematic structural view of the upper transmission plate of the present invention.

Fig. 8 is a schematic structural view of the lower transmission plate of the present invention.

Fig. 9 is a schematic structural view of the support frame of the present invention.

Fig. 10 is a schematic structural view of the limiting plate of the present invention.

Description of the main reference numerals:

1-a lock shell, 2-a swing plate, 3-an upper driving plate, 301-a first limit hole, 302-a third limit hole, 4-a lower driving plate, 401-a second limit hole, 5-a groove, 6-a lug, 7-a rotating shaft hole, 8-a rotating shaft connector, 9-a first protruding rod, 10-a second protruding rod, 11-a tension spring, 12-a first hook, 13-a first protruding point, 14-a second hook, 15-a second protruding point, 16-a first longitudinal sliding groove, 17-a second longitudinal sliding groove, 18-a third longitudinal sliding groove, 19-a support frame, 191-a first support plate, 192-a second support plate, 193-a third support plate, 194-a fourth support plate, 20-a lock tongue, 21-a through groove, 22-a transverse sliding groove, 23-telescopic rod, 24-blocking piece, 25-return spring, 26-fixing piece, 27-first positioning piece, 28-second positioning piece, 29-limiting piece, 30-through hole, 31-clamping block, 32-longitudinal spacing piece, 33-inserting block, 34-inserting hole, 35-first sliding block, 36-second sliding block and 37-third sliding block.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

As shown in fig. 1 to 10, an automatic lock bolt includes a housing 1, a telescopic assembly movable relative to the housing 1, and a safety assembly mounted on the housing 1. The telescopic assembly comprises a swinging plate 2, an upper transmission plate 3 and a lower transmission plate 4; the safety assembly comprises a support frame 19 connected with the lock shell 1 in a sliding mode and a bolt 20 arranged at the outer end of the support frame 19.

The swing piece 2 one end is equipped with recess 5, and the other end is equipped with lug 6, forms the draw-in groove between 6 upsides of lug and the body of swing piece 2. The middle part of the swinging piece 2 is provided with a rotating shaft hole 7, and a rotating shaft connector 8 is arranged at the rotating shaft hole 7. When the swinging piece 2 is used, the rotating shaft connector 8 is connected with an external handle, and the rotation of the swinging piece 2 is controlled through the handle. When the lug 6 is driven by the rotating shaft connector 8 to rotate upwards, the second protruding rod 10 moves upwards under the driving of the lug 6, namely, the lower transmission piece 4 retracts upwards into the lock shell 1, and meanwhile, the groove 5 drives the first protruding rod 9 to move downwards, namely, the upper transmission piece 3 retracts downwards into the lock shell 1. When the rotating shaft connector 8 rotates reversely, the groove 5 drives the first protruding rod 9 to move upwards, namely the upper transmission piece 3 extends out of the lock shell 1 upwards; at this time, the lower driving plate 4 is not controlled by the linkage of the swinging plate 2.

The upper transmission piece 3 is provided with a first protruding rod 9, the lower transmission piece 4 is provided with a second protruding rod 10, the first protruding rod 9 is arranged in the groove 5, and the second protruding rod 10 is arranged on the upper side of the lug 6. The tension spring 11 is hung between the upper transmission piece 3 and the lock shell 1, namely, the lower end of the upper transmission piece 3 is provided with a first convex hook 12, a first protruding point 13 is arranged on the lock shell 1 above the first hook 12, and the tension spring 11 is hung between the first hook 12 and the first protruding point 13. A tension spring 11 is also hung between the lower transmission piece 4 and the lock shell 1, namely, a second hook 14 is arranged on the outer side of the upper end of the lower transmission piece 4, a second protruding point 15 is arranged on the lock shell 1 below the second hook 14, and the tension spring 11 is also hung between the second hook 14 and the second protruding point 15.

The lock shell is characterized in that a first longitudinal sliding groove 16, a second longitudinal sliding groove 17 and a third longitudinal sliding groove 18 are formed in the lock shell 1, a first sliding block 35 and a third sliding block 37 which are matched with the first longitudinal sliding groove 16 and the third longitudinal sliding groove 18 are respectively arranged on the upper transmission piece 3, and a second sliding block 36 which is matched with the second longitudinal sliding groove 17 is arranged on the lower transmission piece 4.

The upper transmission plate 3 is provided with a first limiting hole 301 and a third limiting hole 303, and the first protruding rod 9 penetrates through the first limiting hole 301 and is connected with the first sliding block 35; and the first projecting rod 9 and the first sliding block 35 are integrally formed, i.e. both comprise a longitudinal rod and a transverse sliding piece, the diameter of the sliding piece is greater than that of the longitudinal rod. Third slider 37 is including running through the vertical pole of third spacing hole 302 and locating the horizontal gleitbretter of bottom, and the diameter of gleitbretter is greater than the diameter of vertical pole. The lower transmission piece 4 is provided with a second limiting hole 401, the second protruding rod 10 penetrates through the second limiting hole 401 and is connected with the second sliding block 36, the second protruding rod 10 and the second sliding block 36 are integrally formed, the second protruding rod and the second sliding block comprise a longitudinal rod and a transverse sliding piece, and the diameter of the sliding piece is larger than that of the longitudinal rod.

The inner side of the lower driving strap 4 is provided with a first positioning tab 27 and a second positioning tab 28 which are protruded, the second positioning tab 28 is positioned above the first positioning tab 27, the height of the second positioning tab 28 which is protruded towards the inner side is larger than that of the first positioning tab 27, when the lock tongue 20 is extended, the first positioning tab 27 is clamped on the support frame 19 to limit the lower driving strap 4 to move downwards, and when the lock tongue 20 is retracted, the second positioning tab 28 is clamped on the support frame 19 to limit the lower driving strap 4 to move downwards. The first positioning sheet 27 may be provided in a groove shape, or may be a step shape with one end being protruded.

The supporting frame 19 is a hollow structure, and includes a first supporting piece 191, a second supporting piece 192, a third supporting piece 193 and a fourth supporting piece 194 which are vertically connected in sequence, the third supporting piece 193 is parallel to the plane where the lower driving piece 4 is located, and the rest supporting pieces are perpendicular to the plane where the lower driving piece 4 is located. A transverse sliding groove 22 is formed in the lock shell 1, the first supporting piece 191 is arranged at one end far away from the bolt 20, and a sliding block matched with the transverse sliding groove 22 is arranged at the bottom of the first supporting piece 191; the front part of the second supporting plate 192 is provided with an upper concave through groove 21 for the lower driving plate 4 to pass through. The third supporting piece 193 is connected with the top of the outer side of the second supporting piece 192 and extends to the side far away from the first supporting piece 191; the fourth supporting piece 194 is parallel to the first supporting piece 191, the middle parts of the first supporting piece 191 and the fourth supporting piece 194 are respectively provided with a through hole, and the central connecting line of the two through holes is parallel to the plane where the lower transmission piece 4 is located. A limiting piece 29 is further sleeved on the outer side of the telescopic rod 23 between the fourth supporting piece 194 and the locking bolt 20. Spacing piece 29 vertically sets up, and both ends respectively with lock shell 1 contact to can move relative lock shell 1, spacing piece 29 set up and make the spring bolt be difficult for rocking, improve the steadiness of tool to lock. The first supporting piece 191 is further provided with a through hole 30, and one side of the lower part of the upper transmission piece 3 is provided with a clamping block 31. When the upper transmission piece 3 and the lower transmission piece 4 retract to the lock shell 1, the bolt 20 is manually pressed, the bolt 20 and the support frame 19 both move inwards, the clamping block 31 of the upper transmission piece 3 penetrates through the through hole 30 and is clamped on the first support piece 191, namely the upper transmission piece 3 is locked, and due to the linkage effect of the swinging piece 2, the lower transmission piece 4 is also locked, so that the device is convenient to install. After the installation, the bolt 20 is manually pressed, so that the fixture block 31 of the upper transmission piece 3 is separated from the first support piece 191, and the upper transmission piece 3 and the lower transmission piece 4 are ejected out of the lock case 1. The operation is convenient.

The lock tongue 20 is connected with the support frame 19 through the telescopic rod 23, and the first support piece 191 and the fourth support piece 194 at the two ends of the support frame 19 are respectively provided with a through hole. A fixing plate 26 is also inserted into the lock case on the inner side of the supporting frame 19, and a through hole for the telescopic rod 23 to penetrate through is also arranged on the fixing plate 26; the telescopic rod 23 penetrates through the through holes in the support frame 19 and the fixing plate 26, the outer end of the telescopic rod 23 is fixedly connected with the bolt 20 through a buckle, and the other end of the telescopic rod is provided with a blocking piece 24. A return spring 25 is arranged on the outer side of the telescopic rod 23 between the fixing piece 26 and the front end of the support frame 19, and a spring is sleeved on the outer side of the telescopic rod 23 between the blocking piece 24 and the tail end of the support frame 19. The blocking piece 24 is provided with a through hole corresponding to the side of the lock case 1, and a tool can be used for compressing a spring between the blocking piece 24 and the tail end of the supporting frame 19 and then rotating the direction of the lock tongue 20 so as to meet the installation requirement. The automatic lock control bolt can meet the installation requirements of doors in different directions, such as the left side, the right side and the like, and has wide application range.

The upper side and the lower side of one end, close to the lock tongue 20, of the support frame 19 are respectively provided with a longitudinal partition 32, and the longitudinal partition 32 and the lock shell 1 enclose a hollow cuboid which is matched with the lock tongue of the main lockset for use. The top and the bottom of the longitudinal spacer 32 are respectively provided with an insert block 33, and the lock shell 1 is provided with an insertion hole 34 matched with the insert block 33. Vertical spacer 32 is pegged graft with lock shell 1 through inserted block 33, simple to operate compares tradition and passes through welded fastening, and the installation accuracy is higher, and more is favorable to improving the packaging efficiency of device.

When the door is opened, the main lock is separated from the bolt, and the support frame 19 and the bolt 20 move towards the outer side of the lock shell 1 under the action of the return spring 25; the door handle connected with the rotating shaft connector 8 is manually rotated, the swinging piece 2 swings anticlockwise and upwards to drive the upper driving piece 3 to retract downwards, and meanwhile, the lower driving piece 4 is driven to retract upwards (as shown in fig. 4). After the door handle is loosened, the swinging piece 2 rotates reversely, only the upper transmission piece 3 is driven to extend outwards, and the first positioning piece 27 on the lower transmission piece 4 is clamped on the support frame 19 to prevent the lower transmission piece 4 from extending downwards. That is, in the door opening state, the lower transmission piece 4 is in the contraction state, and the floor or the doorsill cannot be scratched (as shown in fig. 5).

When the door is closed, the supporting frame 19 and the lock 20 move towards the inner side of the lock case 1 (after the door is closed to the designated position, the main lock touches the lock tongue 20 and drives the supporting frame 19 and the lock tongue 20 to move towards the outer side of the lock case), the first positioning piece is separated from the supporting frame 19, the lower driving piece 4 extends outwards under the action of the tension spring 11, and the lower driving piece 4 stops extending outwards when the second positioning piece 28 touches the supporting frame 19. The supporting frame 19 moves inwards and contacts with the bottom end of the upper transmission piece 3 to block the downward movement of the upper transmission piece 3, the downward movement of the upper transmission piece 3 and the upward movement of the lower transmission piece 4 are in linkage relation, namely the upward movement of the lower transmission piece 4 is limited at the moment, and the whole device is locked (as shown in fig. 3).

In summary, the upper transmission piece 3 and the lower transmission piece 4 in the telescopic assembly are in one-way linkage, compared with the two-way linkage, when the door is closed, the lock cannot scratch the floor or the doorsill, the attractiveness of the floor or the doorsill cannot be influenced, and the service life of the lock can be prolonged; and the automatic lock control bolt can be used under the condition of the existence of the threshold, and has wide application range.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. An automatic lock control bolt comprises a lock shell, a telescopic assembly moving relative to the lock shell and a safety assembly arranged on the lock shell, and is characterized in that:

when the door is opened, the support frame and the lock tongue move towards the outer side of the lock shell under the action of the return spring; the rotating shaft connector is manually rotated, the swinging sheet drives the upper transmission sheet to retract downwards, and meanwhile, the lower transmission sheet is driven to retract upwards; when the swinging piece rotates reversely, only the upper transmission piece is driven to extend outwards, and the first positioning piece on the lower transmission piece is clamped on the support frame to prevent the lower transmission piece from extending downwards;

when closing the door, support frame and spring bolt are to the inboard removal of lock shell, and first spacer breaks away from the support frame, and the lower driving plate outwards stretches out under the effect of extension spring, and at this moment, the support frame blocks the upward movement of last driving plate, also restricts the upward movement of lower driving plate promptly simultaneously, and whole device is locked.

2. The automatic lock control latch according to claim 1, wherein said swinging piece is provided with a groove at one end and a tab at the other end; the upper transmission piece is provided with a first protruding rod, the lower transmission piece is provided with a second protruding rod, the first protruding rod is arranged in the groove, and the second protruding rod is arranged on the upper side of the protruding piece.

3. The automatic lock control latch according to claim 1, wherein the swinging piece is provided with a saw tooth at one end and a lug at the other end; the upper transmission piece is provided with teeth matched with the sawteeth, the lower transmission piece is provided with a second protruding rod, and the second protruding rod is arranged on the upper side of the protruding piece.

4. The automatic lock control bolt according to claim 1, wherein the bolt is connected to a support frame through a telescopic rod, and both ends of the support frame are respectively provided with a through hole; a fixing plate is also inserted into the lock shell on the inner side of the supporting frame, and a through hole for the telescopic rod to penetrate through is also formed in the fixing plate; the telescopic link runs through the perforation, the telescopic link outer end with link to each other with the spring bolt through screw thread or buckle, the telescopic link outside between stationary blade and the support frame front end is located to the return spring cover.

5. The automatic lock control bolt according to claim 4, wherein a catch is provided at an end of the telescopic rod away from the lock tongue, and a spring is sleeved outside the telescopic rod between the catch and the end of the support frame.

6. The automatic lock control latch according to claim 4, wherein said support frame includes a first support piece, a second support piece, a third support piece and a fourth support piece vertically connected in sequence, said third support piece being parallel to the plane of the lower driving piece, the remaining support pieces being perpendicular to the plane of the lower driving piece; the lock shell is provided with a transverse sliding groove, the first supporting sheet is arranged at one end far away from the lock tongue, the bottom of the first supporting sheet is provided with a sliding block matched with the transverse sliding groove, the through groove is arranged at the front part of the second supporting sheet, the through holes are respectively arranged on the first supporting sheet and the fourth supporting sheet, and the central connecting line of the two through holes is parallel to the plane where the lower transmission sheet is arranged; the first supporting plate is further provided with a through hole, and one side of the lower portion of the upper transmission plate is provided with a clamping block.

7. The automatic lock control bolt according to claim 6, wherein a limiting piece is further sleeved on the outer side of the telescopic rod between the fourth support piece and the bolt.

8. The automatic lock control bolt according to claim 1, wherein a second protruding positioning piece is further disposed on an inner side of the lower driving piece, the second positioning piece is located above the first positioning piece, a height of the second positioning piece protruding inward is greater than that of the first positioning piece, and when the lock tongue is retracted inward, the second positioning piece is clamped on the support frame to limit a downward movement range of the lower driving piece.

9. The automatic lock control latch according to claim 2, wherein a tension spring is hung between said upper driver blade and said lock case; a first longitudinal sliding groove is formed in the lock shell, and a first sliding block matched with the first longitudinal sliding groove is arranged on the upper transmission piece; a second longitudinal sliding groove is formed in the lock shell, and a second sliding block matched with the second longitudinal sliding groove is arranged on the lower transmission piece; the upper transmission piece is provided with a first limiting hole, and the first protruding rod penetrates through the first limiting hole and is connected with the first sliding block; and a second limiting hole is formed in the lower transmission sheet, and the second protruding rod penetrates through the second limiting hole and is connected with the first sliding block.

10. The automatic lock-control bolt according to claim 1, wherein the upper and lower sides of the end of the support frame adjacent to the bolt are respectively provided with a longitudinal partition, the longitudinal partition and the lock case define a hollow cuboid, the top and bottom of the longitudinal partition are respectively provided with an insert block, and the lock case is provided with an insert hole matched with the insert block.