Push-pull lock

Abstract

The utility model belongs to the technical field of door and window accessories, and provides a push-pull lock which comprises a first lock box and a lock catch mechanism installed on the first lock box, the lock catch mechanism comprises a shifting rod, a shifting fork and a safety piece, the first lock box is provided with a sliding groove in sliding fit with the shifting rod in the length direction, and one end of the shifting rod is connected with an installation base. One end of the shifting fork is movably connected with the mounting base, the other end of the shifting fork extends out of the first lock box, a movable groove is formed in the mounting base, a sliding block in sliding fit with the movable groove is arranged on the shifting fork, the safety piece comprises an elastic arm and a clamping block, one end of the elastic arm is connected with the shifting fork, the other end of the elastic arm is connected with the clamping block, and a clamping groove corresponding to the clamping block is formed in the inner wall of the sliding groove. An ejection block and an unlocking groove are arranged on one side, close to the clamping block, of the mounting seat, the ejection block is used for limiting the clamping block to be separated from the clamping groove, the unlocking groove is used for containing the clamping block, an elastic piece is further arranged between the sliding block and the movable groove, and the elastic piece is used for pushing the unlocking groove away from the clamping piece.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window accessories, in particular to a push-pull lock. Background Art

[0002] Sliding doors and swing doors are two commonly used doors. Since sliding doors do not take up additional space for opening the door, they are generally more widely used in scenes such as study rooms, kitchens and balconies. Since the opening and closing methods of sliding doors are different from those of swing doors, the door locks used for sliding doors are also different from those used for swing doors. There are generally two types of locks used for sliding doors. One is a hinged door lock with a lock hook on the side of the door frame and a rotatable lock tongue on the door leaf. The lock tongue is also provided with a tension spring for resetting. When the door leaf is pushed to the door frame, the lock hook and the lock tongue will automatically combine. When opening the door, press the lock tongue to separate the lock tongue from the lock hook to open the door leaf. The advantages are simple structure and low cost. The disadvantages are that the lock tongue and lock hook are combined by collision, which is easy to deform, has a short service life, and requires manual labor during the unlocking process. It is troublesome to keep pressing the lock tongue; the other is a push-pull door lock, in which a lock tongue is provided on the door frame, and a shift fork that can slide in the vertical direction is provided on the door leaf. The shift fork is driven up and down by a shift rod. When the door leaf is pushed to the door frame and fits into place, the shift rod pushes the shift fork to clamp the lock tongue to achieve locking. When unlocking, the shift rod is pushed to drive the shift fork to reset, so that the shift fork is separated from the lock tongue, and unlocking can be achieved. The advantage is that it can avoid direct collision between the shift fork and the lock tongue, reduce noise, and avoid deformation of the lock tongue and the shift fork. The disadvantage is that the shift fork is positioned by the bow-shaped spring piece and the groove on the lock box. The spring piece is prone to failure after long-term use, and the reliability is low.

[0003] The technical problem to be solved by the utility model is: how to solve the problem of low reliability of the existing push-pull lock structure. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a push-pull lock which has the characteristics of simple and practical structure and high reliability.

[0005] The locking mechanism is configured to lock the locking cam of the lock member and to lock the locking cam of the lock member so that the locking cam can be locked.

[0006] When the fork is in the locked position, the push-pull lock is locked, and the locking block is locked in the locking groove, so that the push-pull lock is locked. There is a gap between the sliders, and because the engaging block remains engaged with the engaging slot, the shift fork and the safety piece remain stationary. When the lever slides the distance of the gap, the position of the top block is offset from the engaging block, and the unlocking slot moves to the side of the engaging block away from the engaging slot. Then the lever continues to slide, driving the shift fork and the safety piece to slide, so that the engaging block is pressed into the unlocking slot, the engaging block is separated from the engaging slot, the constraint is released, and the shift fork is separated from the external lock tongue to achieve unlocking. Therefore, the unlocking of the push-pull lock of this application must be achieved by pushing the lever, so it has better reliability and safety.

[0007] In some embodiments, the shift fork includes a fork extending out of the first lock box and a base built into the slide groove, the fork is connected to one side of the base, the slider is connected to the base, the base is provided with a connecting elastic groove and a telescopic groove, the elastic arm is arranged in the elastic groove, and the clamping block is arranged in the telescopic groove.

[0008] By adopting the above technical solution, by setting an elastic groove with a similar contour to the elastic arm, the elastic arm can be better swung and reset, and by setting a telescopic groove, the clamping block can be better moved, avoiding interference of the base on the clamping block.

[0009] In some embodiments, the safety member further includes a connecting seat connected to the other end of the elastic arm, and the connecting seat is snap-connected to the base.

[0010] By adopting the above technical solution and providing a connecting seat, the safety member can be better connected to the base.

[0011] In some embodiments, the first lock box is provided with a clearance groove corresponding to the fork, and the clearance groove is connected to the sliding groove.

[0012] By adopting the above technical solution, the provision of the air avoidance groove can prevent the first lock box from interfering with the movement of the fork on the one hand, and can limit the sliding range of the fork on the other hand to avoid damage caused by overtravel.

[0013] In some embodiments, the slider is provided at one end of the base, a hook block is further provided at the end of the base away from the slider, and a hook groove corresponding to the hook block is provided on the mounting seat.

[0014] By adopting the above technical solution, the hook groove and the hook block cooperate with each other, so as to increase the reliability of the combination between the base and the mounting seat, and make the combined force between the two more balanced.

[0015] In some embodiments, a first handle groove is provided on the first lock box, and a shifting portion corresponding to the first handle groove is provided on the shifting rod.

[0016] By adopting the above technical solution, the first handle groove is opened on the first lock box to push and pull the door leaf, which is convenient for opening and closing the door, and no additional handle is required, making the doors and windows more simple. The toggle part is set in the first handle groove to avoid exposure of the toggle part, and the appearance is more beautiful.

[0017] In some embodiments, it also includes a second lock box and an unlocking mechanism for driving the shift rod to slide back and forth along the slide groove. The second lock box is arranged opposite to the first lock box, and the second lock box is located on the side where the shift fork extends out of the first lock box. The unlocking mechanism includes a lock core arranged on the second lock box and a transmission assembly arranged on the first lock box. The transmission assembly is connected to the lock core, and the rotation of the lock core drives the shift rod to slide back and forth in a straight line through the transmission assembly.

[0018] By adopting the above technical solution, by setting up a second lock box, the first lock box can be set indoors and the second lock box can be set outdoors. When indoors, locking or unlocking can be achieved by directly pushing the lever to slide. When outdoors, locking or unlocking can be achieved by rotating the lock core and indirectly driving the lever to slide. This makes the push-pull lock of the present application able to be locked or unlocked outdoors or indoors, and has a wider range of applicability.

[0019] In some embodiments, the transmission assembly includes a gear and a rack that mesh with each other, the gear is connected to the lock cylinder, and the rack is connected to the shift rod.

[0020] By adopting the above technical solution, the gear is driven to rotate by rotating the lock core, which drives the rack to reciprocate linearly, and finally drives the lever to slide in the slide groove to achieve locking or unlocking.

[0021] In some embodiments, the transmission assembly includes an eccentric wheel and a rocker arm. The eccentric wheel and the lock cylinder are coaxially arranged. One end of the rocker arm is eccentrically pivoted to the eccentric wheel, and the other end is pivoted to the shifting rod.

[0022] By adopting the above technical solution, the eccentric wheel is rotated by rotating the lock core, thereby driving the swing rod to swing, and then the swing rod drives the lever to slide in the slide groove to achieve locking or unlocking.

[0023] In some embodiments, the unlocking mechanism further includes a key or a knob for driving the lock cylinder to rotate.

[0024] With the above technical solution, when security or privacy requirements are high, a key can be used to drive the lock cylinder to rotate. When security or privacy requirements are not so high, a rotation-driven lock cylinder can be used to rotate, which is highly flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a push-pull lock according to a preferred embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic structural diagram of the push-pull lock from another perspective is shown;

[0027] Figure 3 for Figure 1 A schematic structural diagram of the first lock box and the lock mechanism in the push-pull lock shown;

[0028] Figure 4 for Figure 3 The schematic diagram of the structure of the shift fork, safety element and mounting seat in the push-pull lock shown;

[0029] Figure 5 for Figure 4 The schematic diagram of the structure of the shift fork, safety member and mounting seat shown;

[0030] Figure 6 for Figure 5 The schematic diagram of the structure of the shift fork is shown.

[0031] In the figure: 100, push-pull lock; 10, first lock box; 11, slide groove; 12, card slot; 13, air avoidance groove; 14, first handle slot; 20, lock mechanism; 21, toggle lever; 211, toggle part; 22, fork; 221, slider; 222, base; 223, fork; 224, elastic groove; 225, telescopic groove; 226, hook block; 23, safety piece; 231, elastic arm; 232, card block; 233, connecting seat; 24, mounting seat; 241, movable groove; 242, top block; 243, unlocking groove; 244, hook slot; 25, elastic piece; 30, second lock box; 31, second handle slot; 40, unlocking mechanism; 41, lock cylinder; 42, gear; 43, rack. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may also be an element centered thereon. When the number of an element is referred to as having "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] See also Figures 1 to 6, which is a push-pull lock 100 of a preferred embodiment of the present invention, includes a first lock box 10 and a lock mechanism 20 installed on the first lock box 10. The lock mechanism 20 includes a lever 21, a shift fork 22 and a safety member 23. The first lock box 10 is provided with a slide groove 11 in the length direction that slides with the lever 21. One end of the lever 21 is connected to a mounting seat 24. One end of the shift fork 22 is movably connected to the mounting seat 24, and the other end extends out of the first lock box 10. A movable groove 241 is provided on the mounting seat 24, and a slider 22 is provided on the shift fork 22 that slides with the movable groove 241. 1. The safety member 23 includes an elastic arm 231 and a clamping block 232. One end of the elastic arm 231 is connected to the shift fork 22, and the other end is connected to the clamping block 232. The inner wall of the slide 11 is provided with a clamping slot 12 corresponding to the clamping block 232. The mounting base 24 is provided with a top block 242 and an unlocking slot 243 on the side near the clamping block 232. The top block 242 is used to prevent the clamping block 232 from being disengaged from the clamping slot 12, and the unlocking slot 243 is used to receive the clamping block 232. An elastic member 25 is also provided between the slider 221 and the movable slot 241. The elastic member 25 is used to push the unlocking slot 243 away from the clamping member. The push-pull lock 100 of the present application has the characteristics of simple and practical structure and high reliability.

[0036] It should be noted that the width of the movable groove 241 is greater than the thickness of the slider 221, and when the side wall of the movable groove 241 close to the unlocking groove 243 contacts the slider 221, the unlocking groove 243 must be moved to the side of the clamping block 232 away from the clamping groove 12, so as to ensure that pushing the lever 21 can drive the clamping block 232 to disengage from the clamping groove 12, and when the clamping block 232 is in the clamping groove 12, due to the pressure of the inner wall of the slide groove 11, the clamping block 232 is received in the unlocking groove 243, and at this time the lever 21, the shift fork 22 and the safety member 23 can slide arbitrarily.

[0037] In this embodiment, the elastic member 25 is a compression spring, and the two ends of the compression spring respectively abut the slider 221 and the side wall of the movable groove 241 close to the unlocking groove 243. In other embodiments, the elastic member 25 can also use elastic components that can achieve the same function, such as tension springs, elastic columns supported by silicone rubber materials, etc.

[0038] like Figure 3As shown, the shift fork 22 includes a fork 223 extending out of the first lock box 10 and a base 222 built into the slide groove 11. The fork 223 is connected to one side of the base 222, and the slider 221 is connected to the base 222. The base 222 is provided with a connecting elastic groove 224 and a telescopic groove 225. The elastic arm 231 is disposed in the elastic groove 224, and the engaging block 232 is disposed in the telescopic groove 225. By providing the elastic groove 224 with a similar profile to the elastic arm 231, the elastic arm 231 can be more easily swung and reset, while the telescopic groove 225 can be provided to allow the engaging block 232 to move more freely, thereby preventing the base 222 from interfering with the engaging block 232.

[0039] In this embodiment, the safety member 23 further includes a connecting seat 233, which is connected to the other end of the elastic arm 231 and is engaged with the base 222. The provision of the connecting seat 233 allows the safety member 23 to be better connected to the base 222. That is, in this embodiment, the safety member 23 and the shift fork 22 are separate structures. In other embodiments, the safety member 23 and the shift fork 22 may also be an integrated structure.

[0040] like Figure 2 As shown, the first lock box 10 is provided with a clearance groove 13 corresponding to the fork 223, and the clearance groove 13 is connected to the slide groove 11. The provision of the clearance groove 13 can prevent the first lock box 10 from interfering with the movement of the fork 223 on the one hand, and on the other hand, limit the sliding range of the fork 223 to avoid overtravel and damage.

[0041] Preferably, the slider 221 is disposed at one end of the base 222. A hook block 226 is further disposed at the end of the base 222 away from the slider 221. The mounting base 24 is provided with a hook groove 244 corresponding to the hook block 226. The hook groove 244 cooperates with the hook block 226 to increase the reliability of the connection between the base 222 and the mounting base 24, making the force applied to the connection between the two more balanced.

[0042] like Figure 1 As shown, the first lock box 10 is provided with a first handle groove 14, and the toggle lever 21 is provided with a toggle portion 211 corresponding to the first handle groove 14. By providing the first handle groove 14 on the first lock box 10, the door leaf can be pushed and pulled, making it easier to open and close the door without the need for an additional handle, making the door and window more concise. Moreover, by placing the toggle portion 211 in the first handle groove 14, the toggle portion 211 can be prevented from being exposed, resulting in a more beautiful appearance.

[0043] In this embodiment, the toggle portion 211 is a bend respectively arranged at both ends of the first handle groove 14. In other embodiments, the toggle portion 211 can also be a protrusion, groove or through hole structure set on the toggle rod 21, as long as the toggle portion 211 can easily drive the toggle rod 21 to slide in the slide groove 11.

[0044] In this embodiment, the lever 21 and the mounting seat 24 are integrally formed. In other embodiments, the lever 21 and the mounting seat 24 may also be split structures, and the lever 21 and the mounting seat 24 may be connected by fasteners, clamping or bonding.

[0045] In one embodiment, the push-pull lock 100 of the present application may further include a second lock box 30 and an unlocking mechanism 40 for driving the lever 21 to slide back and forth along the slide groove 11. The second lock box 30 is disposed opposite the first lock box 10 and is located on the side where the shift fork 22 extends from the first lock box 10. The unlocking mechanism 40 includes a lock cylinder 41 disposed on the second lock box 30 and a transmission assembly disposed on the first lock box 10. The transmission assembly is in transmission connection with the lock cylinder 41. Rotation of the lock cylinder 41 drives the lever 21 to slide back and forth linearly through the transmission assembly. By providing the second lock box 30, the first lock box 10 can be located indoors and the second lock box 30 outdoors. When indoors, locking or unlocking can be achieved by directly pushing the lever 21 to slide. When outdoors, locking or unlocking can be achieved by rotating the lock cylinder 41, which indirectly drives the lever 21 to slide. This allows the push-pull lock 100 of the present application to be locked or unlocked both indoors and outdoors, providing a wider range of applications.

[0046] Optionally, the transmission assembly includes a gear 42 and a rack 43 that mesh with each other, the gear 42 is connected to the lock cylinder 41, and the rack 43 is connected to the lever 21. By rotating the lock cylinder 41, the gear 42 is driven to rotate, which drives the rack 43 to reciprocate linearly, and finally drives the lever 21 to slide in the slide groove 11 to achieve locking or unlocking.

[0047] Furthermore, an elongated hole corresponding to the gear 42 is provided in the middle of the rack 43, and meshing teeth engaging with the gear 42 are provided on opposite sides of the elongated hole. This can prevent the gear 42 and the rack 43 from being easily separated, and the transmission is more reliable.

[0048] Furthermore, the rack 43 and the shift rod 21 are split structures, and the rack 43 and the shift rod 21 are connected by a dovetail tenon and a dovetail groove. In other embodiments, the rack 43 and the shift rod 21 can also be connected by fasteners (screws, rivets, etc.), bonding, threaded connection, etc., and the rack 43 and the shift rod 21 can also be set as an integrally formed structure.

[0049] In other embodiments, the transmission assembly includes an eccentric wheel and a rocker arm. The eccentric wheel is coaxially arranged with the lock core 41. One end of the rocker arm is eccentrically pivoted to the eccentric wheel, and the other end is pivoted to the lever 21. By rotating the lock core 41, the eccentric wheel rotates, thereby driving the rocker arm to swing. The rocker arm then drives the lever 21 to slide in the slide groove 11 to achieve locking or unlocking.

[0050] Optionally, the unlocking mechanism 40 further includes a key or knob for driving the rotation of the lock cylinder 41. When security or privacy needs are high, the key can be used to drive the lock cylinder 41 to rotate. When security or privacy needs are not so high, the rotation-driven lock cylinder 41 can be used to rotate, which is highly flexible.

[0051] In order to facilitate opening and closing the door, a second handle groove 31 is further provided on the second lock box 30 .

[0052] When the fork 22 is pushed to the designated position, the locking block 232 of the safety member 23 is engaged in the locking groove 12, and the fork 22 can be fixed in this position. At this time, the fork 22 is combined with the external lock tongue to lock the door, and under the action of the elastic member 25, the top block 242 is kept on the side of the locking block 232 away from the locking groove 12, which can prevent the locking block 232 from being separated from the locking groove 12 due to the weight of the fork 22 and the fork 22 and the fork 22 or the fork 21. A slight external force is applied to the fork 22 or the fork 21, thereby improving the locking reliability of the push-pull lock 100; when unlocking, the fork 22 is pushed to slide in the direction away from the locking groove 12. Since the movable groove 241 is in contact with the locking block 232, the locking block 232 is not engaged with the locking block 232. There is a gap between the sliders 221, and because the engaging block 232 remains engaged with the slot 12, the shift fork 22 and the safety piece 23 remain stationary. When the lever 21 slides the distance of the above gap, the position of the top block 242 is offset from the engaging block 232, and the unlocking slot 243 moves to the side of the engaging block 232 away from the slot 12. Then the lever 21 continues to slide, driving the shift fork 22 and the safety piece 23 to slide, so that the engaging block 232 is pressed into the unlocking slot 243, and the engaging block 232 is separated from the slot 12, releasing the constraint, so that the shift fork 22 is separated from the external lock tongue, and unlocking is achieved. Therefore, the unlocking of the push-pull lock 100 of the present application must be achieved by pushing the lever 21, so it has better reliability and safety.

[0053] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A push-pull lock, comprising a first lock box (10) and a locking mechanism (20) mounted on the first lock box (10), characterized in that: The locking mechanism (20) includes a shift rod (21), a shift fork (22) and a safety piece (23). The first lock box (10) is provided with a sliding groove (11) in the length direction and is slidably matched with the shift rod (21). One end of the shift rod (21) is connected to a mounting seat (24). One end of the shift fork (22) is movably connected to the mounting seat (24), and the other end extends out of the first lock box (10). The mounting seat (24) is provided with a movable groove (241). The shift fork (22) is provided with a slider (221) slidably matched with the movable groove (241). The safety piece (23) includes an elastic arm (231) and a clamping block (232). One end of the elastic arm (231) is connected to the shift fork (22), and the other end is connected to the clamping block (232). The inner wall of the slide groove (11) is provided with a clamping groove (12) corresponding to the clamping block (232). The side of the mounting seat (24) close to the clamping block (232) is provided with a top block (242) and an unlocking groove (243). The top block (242) is used to limit the clamping block (232) from detaching from the clamping groove (12). The unlocking groove (243) is used to accommodate the clamping block (232). An elastic member (25) is further provided between the slider (221) and the movable groove (241). The elastic member (25) is used to push the unlocking groove (243) away from the clamping member.

2. The push-pull lock according to claim 1, characterized in that: The shift fork (22) includes a fork (223) extending out of the first lock box (10) and a base (222) built into the slide groove (11); the fork (223) is connected to one side of the base (222); the slider (221) is connected to the base (222); a communicating elastic groove (224) and a telescopic groove (225) are provided on the base (222); the elastic arm (231) is arranged in the elastic groove (224); and the clamping block (232) is arranged in the telescopic groove (225).

3. The push-pull lock according to claim 2, characterized in that: The safety member (23) further comprises a connecting seat (233), wherein the connecting seat (233) is connected to the other end of the elastic arm (231), and the connecting seat (233) is clamped with the base (222).

4. The push-pull lock according to claim 2, characterized in that: The first lock box (10) is provided with a clearance groove (13) corresponding to the fork (223), and the clearance groove (13) is communicated with the slide groove (11).

5. The push-pull lock according to claim 2, characterized in that: The slider (221) is arranged at one end of the base (222); a hook block (226) is further arranged at one end of the base (222) away from the slider (221); and a hook groove (244) corresponding to the hook block (226) is provided on the mounting seat (24).

6. The push-pull lock according to claim 1, characterized in that: The first lock box (10) is provided with a first handle groove (14), and the shifting rod (21) is provided with a shifting portion (211) corresponding to the first handle groove (14).

7. The push-pull lock according to claim 1, characterized in that: The invention also includes a second lock box (30) and an unlocking mechanism (40) for driving the shift rod (21) to slide back and forth along the slide groove (11). The second lock box (30) is arranged opposite to the first lock box (10), and the second lock box (30) is located on the side where the shift fork (22) extends out of the first lock box (10). The unlocking mechanism (40) includes a lock core (41) arranged on the second lock box (30) and a transmission assembly arranged on the first lock box (10). The transmission assembly is connected to the lock core (41) in a transmission manner. The lock core (41) rotates through the transmission assembly to drive the shift rod (21) to slide back and forth in a straight line.

8. The push-pull lock according to claim 7, characterized in that: The transmission assembly comprises a gear (42) and a rack (43) meshing with each other, the gear (42) is connected to the lock core (41), and the rack (43) is connected to the shifting rod (21).

9. The push-pull lock according to claim 7, characterized in that: The transmission assembly comprises an eccentric wheel and a rocker arm. The eccentric wheel and the lock core (41) are coaxially arranged. One end of the rocker arm is eccentrically pivoted to the eccentric wheel, and the other end is pivoted to the shifting rod (21).

10. The push-pull lock according to claim 7, characterized in that: The unlocking mechanism (40) further comprises a key or a knob for driving the lock cylinder (41) to rotate.

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