Push lock

Abstract

Disclosed in the present invention is a push lock, comprising a housing, an operating panel, a C-shaped pin and a push spring. One end of the operating panel is indirectly connected to the housing by means of the push spring. The operating panel is provided with a guide groove on the front side and a heart-shaped groove on the rear side. The middle of the C-shaped pin is hingedly connected to the housing, and two ends of the C-shaped pin are slidably connected to the guide groove and the heart-shaped groove on the front and rear sides, respectively. During insertion of the operating panel into the housing, the guide groove can guide the tail end of the C-shaped pin to move towards the side of the operating panel provided with the heart-shaped groove in a sliding direction perpendicular to the operating panel. The overall structure is simple and stable, the machining difficulty and the assembly difficulty are low, and smooth switching between a locked state and an unlock state of a door lock can be guaranteed.

Description

Push lock TECHNICAL FIELD

[0001] The present application relates to the technical field of locks, in particular to the technical field of push locks. BACKGROUND

[0002] Household appliances usually need to lock the door cover during operation to prevent the door cover from being accidentally opened in advance and ensure safety. The push type door lock is a common door lock applied to the door cover without handle. When pressed by the user for the first time, the door cover can be closed and locked, and when pressed by the user for the second time, the door cover can be automatically unlocked. The main functional structure of the push type door lock is a lock plate with a heart-shaped groove and a lock hook that can cooperate with the heart-shaped groove. For example, a push lock structure disclosed in the invention with the publication number CN207538605U, a push type door lock locking and unlocking structure and a push type door lock with the same disclosed in the invention with the publication number CN112031554B, and a door lock device disclosed in the invention with the publication number CN209799629U. The user can switch the lock state and the unlock state of the push type door lock by pressing the lock hook to different positions of the heart-shaped groove.

[0003] At present, in order to avoid the phenomenon of the lock hook being disengaged, so that the push type door lock can be normally switched from the unlock state to the lock state or from the lock state to the unlock state, a complex structure or a compression mechanism (such as a spring or a weight) is often needed. However, during the pressing of the compression mechanism on the lock hook, if the pressing force of the compression part is too large, the sliding of the lock hook along the heart-shaped groove will be limited. This puts high requirements on the manufacturing process and assembly process of the lock plate, the lock hook and the compression mechanism. In addition, the increase of the complex structure or the compression mechanism will also cause the problem of unstable structure of the push type door lock, thereby affecting the service life of the push type door lock. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art and provide a push lock which not only has a simple and stable overall structure, but also has low processing and assembly difficulty and can ensure smooth switching between the lock state and the unlock state of the door lock.

[0005] To achieve the above-mentioned purpose, the present application provides a push lock, which comprises a shell, an operation plate, a C-shaped needle and a pressing spring. One end of the operation plate is indirectly connected with the shell through the pressing spring. The front side of the operation plate is provided with a guide groove, and the rear side is provided with a heart-shaped groove. The middle part of the C-shaped needle is hinged with the shell, and the two ends are respectively slidingly connected in the guide groove and the heart-shaped groove on the front and rear sides. The guide groove can guide the end of the C-shaped needle to move to the side of the operation plate with the heart-shaped groove along the direction perpendicular to the sliding direction of the operation plate during the insertion of the operation plate into the shell.

[0006] As preferred, the relative distance between the C-shaped needle and the operation plate in the locked state satisfies the condition that size A < size B, and the relative distance between the C-shaped needle and the shell satisfies the condition that size C < size B.

[0007] As preferred, the arc groove wall III of the heart-shaped groove intersects the projections of the inner groove wall I and the outer groove wall II of the guide groove in the direction of the rotation axis of the C-shaped needle, the straight groove wall IV of the heart-shaped groove intersects the projections of the inner groove wall I and the outer groove wall II of the guide groove in the direction of the rotation axis of the C-shaped needle, and the concave groove wall V of the heart-shaped groove does not intersect the projections of the inner groove wall I and the outer groove wall II of the guide groove in the direction of the rotation axis of the C-shaped needle.

[0008] As preferred, the intersection points of the arc groove wall III of the heart-shaped groove and the inner groove wall I and the outer groove wall II of the guide groove are located on the ab section, and the intersection points of the straight groove wall IV of the heart-shaped groove and the inner groove wall I and the outer groove wall II of the guide groove are located on the ad section.

[0009] As preferred, the heart-shaped groove is composed of a main straight groove, an arc-shaped groove and a C-shaped groove connected in head-to-tail manner, the connection between the main straight groove and the arc-shaped groove penetrates the plate edge of the end of the operation plate inserted into the shell, the main straight groove is parallel to the sliding direction of the operation plate, and the rear end of the C-shaped needle can slide to the inner recess of the C-shaped groove in the locked state and slide to the connection between the main straight groove and the arc-shaped groove in the unlocked state.

[0010] As preferred, the guide groove is composed of a secondary straight groove, a first inclined groove and a second inclined groove connected in sequence, the secondary straight groove is parallel to the sliding direction of the operation plate and penetrates the plate edge of the end of the operation plate inserted into the shell, the slope of the first inclined groove is greater than the slope of the second inclined groove, and the free end of the second inclined groove is opposite to the connection between the main straight groove and the C-shaped groove.

[0011] As preferred, the other end of the operation plate is provided with a claw, one end of the claw is hinged to the operation plate and the other end is provided with an inwardly folded hooking part, the hinge between the claw and the operation plate is provided with a torsion spring with a force to drive the claw to turn outward, and the shell is further provided with a claw folding plate which can drive the claw to turn inward during the insertion of the operation plate into the shell.

[0012] As preferred, a plurality of sliding grooves parallel to the sliding direction of the operation plate are arranged in the shell, and a plurality of sliding blocks are arranged on the operation plate and connected to the sliding grooves in sliding manner.

[0013] As preferred, a plurality of positioning ears are arranged on the shell wall.

[0014] As preferred, the pressing spring is arranged along the sliding direction of the operation plate and fixed to the shell and the operation plate at two ends.

[0015] As preferred, the core column is provided with a narrowed portion at the free end, the outer diameter of which is gradually reduced from the center to the end.

[0016] As preferred, the core column is provided with a narrowed portion at the free end, the outer diameter of which is gradually reduced from the center to the end.

[0017] The beneficial effects of the present application are:

[0018] 1) By respectively arranging a guide groove and a heart-shaped groove on the front and rear sides of the operation plate, and respectively sliding connecting the two ends of the C-shaped needle in the guide groove and the heart-shaped groove through the middle part being hinged to the shell, on one hand, the guide groove can provide a biasing force for the rear end of the C-shaped needle to be clamped into the locking position of the heart-shaped groove during the locking operation, on the other hand, the guide groove can also provide a biasing force for the rear end of the C-shaped needle to be separated from the locking position of the heart-shaped groove during the unlocking operation, so that the overall structure is simple and stable, the processing and assembly difficulties are low, and the smooth switching between the locking state and the unlocking state of the door lock can be ensured.

[0019] 2) By making the distance between the front end of the C-shaped needle and the operation plate smaller than the distance between the rear end of the C-shaped needle and the operation plate in the locking state, the rear end of the C-shaped needle can be effectively prevented from being separated from the locking position of the heart-shaped groove in advance, and the locking effect can be ensured.

[0020] 3) By adopting the guide groove which is composed of the vice straight groove, the first inclined groove and the second inclined groove which are sequentially communicated, and making the slope of the first inclined groove greater than the slope of the second inclined groove, the C-shaped needle can be more stably guided.

[0021] The features and advantages of the present application will be described in detail with reference to the embodiments in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a front view of the press lock in the unlocking state according to the present application;

[0023] Fig. 2 is a schematic diagram of the internal structure of the front side of the press lock in the unlocking state according to the present application;

[0024] Fig. 3 is a schematic diagram of the internal structure of the rear side of the press lock in the unlocking state according to the present application;

[0025] Fig. 4 is a sectional view of M-M in Fig. 1;

[0026] Fig. 5 is a front view of the press lock in the locking state according to the present application;

[0027] Fig. 6 is a schematic diagram of the internal structure of the front side of the press lock in the locking state according to the present application;

[0028] Fig. 7 is a schematic diagram of the internal structure of the rear side of the press lock in the locking state according to the present application;

[0029] Fig. 8 is a N-N sectional view of Fig. 5;

[0030] Fig. 9 is a position corresponding diagram of the guide slot and the heart-shaped slot when the press lock is in the locked state.

[0031] Fig. 1-1 housing, 11-11 sliding slot, 12-12 claw plate, 13-13 positioning ear, 2-2 core column, 3-3 operation plate, 31-31 guide slot, 311-311 secondary straight slot, 312-312 first inclined slot, 313-313 second inclined slot, 32-32 heart-shaped slot, 321-321 main straight slot, 322-322 arc slot, 323-323 C-shaped slot, 4-4 clamping claw, 41-41 hooking part, 5-5 C-shaped needle, 6-6 press spring. DETAILED DESCRIPTION

[0032] Referring to Figs. 1-9, the press lock of the present application comprises a housing 1, an operation plate 3, a C-shaped needle 5 and a press spring 6, one end of the operation plate 3 is indirectly connected with the housing 1 through the press spring 6, the front side of the operation plate 3 is provided with a guide slot 31 and the rear side is provided with a heart-shaped slot 32, the middle part of the C-shaped needle 5 is hingedly connected with the housing 1 and the two ends are respectively slidingly connected in the guide slot 31 and the heart-shaped slot 32, the guide slot 31 can guide the end of the C-shaped needle 5 to move to the side of the operation plate 3 with the heart-shaped slot 32 during the insertion of the operation plate 3 into the housing 1 along the direction perpendicular to the sliding direction of the operation plate 3.

[0033] In the locked state, the relative distance between the C-shaped needle 5 and the operation plate 3 satisfies the size A < size B, and the relative distance between the C-shaped needle 5 and the housing 1 satisfies the size C < size B.

[0034] The arc slot wall III of the heart-shaped slot 32 intersects with the inner slot wall I and the outer slot wall II of the guide slot 31 in the projection direction of the C-shaped needle 5, the straight slot wall IV of the heart-shaped slot 32 intersects with the inner slot wall I and the outer slot wall II of the guide slot 31 in the projection direction of the C-shaped needle 5, and the recess slot wall V of the heart-shaped slot 32 does not intersect with the inner slot wall I and the outer slot wall II of the guide slot 31 in the projection direction of the C-shaped needle 5. That is, the inner slot wall of the guide slot 31 is segment I in Fig. 9; the outer slot wall of the guide slot 31 is segment II in Fig. 9; the arc slot wall of the heart-shaped slot 32 is segment III in Fig. 9; the straight slot wall of the heart-shaped slot 32 is segment IV in Fig. 9; and the recess slot wall of the heart-shaped slot 32 is segment V in Fig. 9.

[0035] The intersection points of the arc slot wall III of the heart-shaped slot 32 and the inner slot wall I and the outer slot wall II of the guide slot 31 are all located on the ab segment, and the intersection points of the straight slot wall IV of the heart-shaped slot 32 and the inner slot wall I and the outer slot wall II of the guide slot 31 are all located on the ad segment.

[0036] The heart-shaped groove 32 is composed of a head-to-tail main straight groove 321 (i.e. the ad section of Fig. 3), an arc-shaped groove 322 (i.e. the ab section of Fig. 3) and a C-shaped groove 323 (i.e. the bcd section of Fig. 3). The connection between the main straight groove 321 and the arc-shaped groove 322 penetrates the edge of the plate inserted into one end of the shell 1. The main straight groove 321 is parallel to the sliding direction of the operation plate 3. The rear end of the C-shaped needle 5 can slide into the inner recess of the C-shaped groove 323 in the locked state and slide into the connection between the main straight groove 321 and the arc-shaped groove 322 in the unlocked state.

[0037] The guide groove 31 is composed of a secondary straight groove 311, a first inclined groove 312 and a second inclined groove 313 connected in sequence. The secondary straight groove 311 is parallel to the sliding direction of the operation plate 3 and its free end penetrates the edge of the plate inserted into one end of the shell 1. The slope of the first inclined groove 312 is greater than that of the second inclined groove 313. The free end of the second inclined groove 313 is opposite to the connection between the main straight groove 321 and the C-shaped groove 323.

[0038] The other end of the operation plate 3 is provided with a pawl 4. One end of the pawl 4 is hinged to the operation plate 3 and the other end is provided with a hooking part 41 folded inward. A torsion spring with a force to turn the pawl 4 outward is arranged at the hinge between the pawl 4 and the operation plate 3. A pawl closing plate 12 is further arranged on the shell 1. The pawl closing plate 12 can turn the pawl 4 inward during the insertion of the operation plate 3 into the shell 1.

[0039] A plurality of sliding grooves 11 parallel to the sliding direction of the operation plate 3 are arranged in the shell 1. A plurality of sliding blocks are respectively arranged on the operation plate 3 and connected with the sliding grooves 11 in a sliding manner.

[0040] A plurality of positioning ears 13 are further arranged on the shell wall.

[0041] The pressing spring 6 is arranged along the sliding direction of the operation plate 3 and its two ends are respectively fixed to the shell 1 and the operation plate 3.

[0042] A core column 2 is further included. One end of the core column 2 is fixed to the shell 1 and the other end is inserted into the central passage of the pressing spring 6.

[0043] The free end of the core column 2 is provided with a narrowing part with a gradually decreasing outer diameter from the center to the end.

[0044] The working process of the application is as follows:

[0045] Referring to FIG. 1 to FIG. 4, at this time, the press lock is in the unlocked state. If it is needed to switch the press lock from the unlocked state to the locked state, a left locking force F (as shown in FIG. 2) is directly applied to the operation plate 3, and then released. In this way, the operation plate 3 will move horizontally left along the sliding grooves 11 under the action of the locking force F, thereby driving the front end of the C-shaped needle 5 to move along the secondary straight groove 311, the first inclined groove 312 and the second inclined groove 313 in turn, and driving the rear end of the C-shaped needle 5 to move from the connection between the main straight groove 321 and the arc-shaped groove 322 to the connection between the C-shaped groove 323 and the arc-shaped groove 322 (the trajectory is around point a→around point b in FIG. 3), and at the same time, the press spring 6 is compressed. When the locking force F is removed, the operation plate 3 will move horizontally right along the sliding grooves 11 under the action of the press spring 6, thereby driving the front end of the C-shaped needle 5 to slightly move back along the second inclined groove 313, and driving the rear end of the C-shaped needle 5 to move from the connection between the C-shaped groove 323 and the arc-shaped groove 322 to the inner recess of the C-shaped groove 323 (the trajectory is around point b→around point c in FIG. 3). In addition, the claw plate 12 will cooperate with the operation plate 3 to drive the pawl 4 to gradually turn inward until the hooking action is completed.

[0046] Referring to FIG. 2 to FIG. 8, at this time, the press lock is in the locked state. If it is needed to unlock the press lock, the operation plate 3 is pushed to the leftmost end, and then released. During this period, on the one hand, the front end of the C-shaped needle 5 will first move to the free end of the second inclined groove 313 under the action of the unlocking force F' (as shown in FIG. 7), and then return to the free end of the secondary straight groove 311 under the action of the press spring 6, and on the other hand, the rear end of the C-shaped needle 5 will first move from the inner recess of the C-shaped groove 323 to the connection between the main straight groove 321 and the C-shaped groove 323 (the trajectory is around point c→around point d in FIG. 3), and then return from the connection between the main straight groove 321 and the C-shaped groove 323 to the connection between the main straight groove 321 and the arc-shaped groove 322 (the trajectory is around point d→around point a in FIG. 3). In addition, the pawl 4 will also return to the outward turning state.

[0047] The above embodiments are illustrative of the present application, but not limiting of the present application. Any simple transformation of the present application belongs to the protection scope of the present application.

Claims

1. A press lock, characterized in that: The utility model relates to a kind of needle safety device, including shell (1), operating plate (3), C type needle (5) and press spring (6), one end of the operating plate (3) is indirectly connected with shell (1) by press spring (6), the front side of the operating plate (3) is equipped with guide slot (31) and rear side is equipped with heart type slot (32), the middle part of the C type needle (5) is hinged with shell (1) and two ends are respectively slidably connected in guide slot (31) and heart type slot (32) in front and back two sides, the guide slot (31) can guide the end of C type needle (5) during operating plate (3) is inserted into shell (1).

2. The push lock of claim 1, wherein: In locked state, the relative distance between the C type needle (5) and operating plate (3) satisfies size A < size B, and the relative distance between the C type needle (5) and shell (1) satisfies size C < size B.

3. The push lock of claim 1, wherein: The arc groove wall III of the heart type slot (32) is intersected with the projection of the inner groove wall I and outer groove wall II of guide slot (31) in the rotation axis direction of C type needle (5), the straight groove wall IV of the heart type slot (32) is intersected with the projection of the inner groove wall I and outer groove wall II of guide slot (31) in the rotation axis direction of C type needle (5), and the recess groove wall V of the heart type slot (32) is not intersected with the projection of the inner groove wall I and outer groove wall II of guide slot (31) in the rotation axis direction of C type needle (5).

4. The push lock of claim 3, wherein: The intersection points of the arc groove wall III of the heart type slot (32) and the inner groove wall I and outer groove wall II of guide slot (31) are all located on ab section, and the intersection points of the straight groove wall IV of the heart type slot (32) and the inner groove wall I and outer groove wall II of guide slot (31) are all located on ad section.

5. The push lock of claim 1, wherein: The other end of the operating plate (3) is provided with a claw (4), one end of the claw (4) is hinged with the operating plate (3) and the other end is provided with an inwardly folded hooking part (41), and the shell (1) is further provided with a claw collecting plate (12), which can drive the claw (4) to turn inward during the insertion of the operating plate (3) into the shell (1).

6. The push lock of claim 1, wherein: The shell (1) is provided with a plurality of sliding grooves (11) parallel to the sliding direction of the operating plate (3), and the operating plate (3) is provided with a plurality of sliding blocks slidably connected with the sliding grooves (11).

7. The push lock of claim 1, wherein: The shell wall is further provided with a plurality of positioning ears (13).

8. The push lock of claim 1, wherein: The press spring (6) is arranged along the sliding direction of the operating plate (3) and both ends are fixed with the shell (1) and the operating plate (3) respectively.

9. The push lock of claim 1, wherein: Further comprising a core column (2), one end of the core column (2) is fixed with the shell (1) and the other end is inserted into the central passage of the press spring (6).

10. The push lock of claim 9, wherein: The free end of the core column (2) is provided with a tapered portion with a gradually decreasing outer diameter from the center to the end.

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