A self-locking structure for lifting a pull rod of a lifting sliding door

Abstract

The present invention discloses a pull rod lifting self-locking structure for lifting sliding doors, comprising a lock body with a transmission mechanism, a handle, a pull rod and a fixed plate, the transmission mechanism comprising a cam and a transmission plate rotated by the handle, the transmission plate having a hook portion and a connecting portion hinged to the cam, a hook hole is provided on the pull rod, the transmission plate and the pull rod are directly connected in the hook hole by hooking with the hook portion, so that the transmission plate and the pull rod cannot rotate relative to each other, at this time, the cam is driven by the handle to reciprocate between a first position and a second position, thereby driving the pull rod to slide up and down, when the cam is in the second position, a self-locking structure is formed between the pull rod, the transmission plate and the cam, so that the transmission plate moves to the highest point and is supported and fixed by the pull rod, and the sliding door can be maintained in a lifted state without manually holding the handle.

Description

Technical Field

[0001] The invention relates to the technical field of hardware, and in particular to a pull rod lifting and self-locking structure for lifting and sliding doors. Background Art

[0002] The handle mechanism is an important component on the door for controlling the opening and closing of the lock. It mainly includes a transmission mechanism arranged in the door panel cavity, a pull rod and a handle arranged on the door panel. By rotating the handle, the transmission mechanism with the pull rod is driven to move up and down in the vertical direction relative to the fixed plate, so that the sliding door is lifted or dropped.

[0003] In the prior art, the transmission mechanism includes a rotatable cam, a pull rod connecting plate and a transmission plate. The pull rod connecting plate is vertically fixed to the pull rod by rivets. One end of the transmission plate is connected to the cam by a connecting shaft, and the other end is connected to the pull rod connecting plate by a connecting shaft. The cam is driven to rotate by a handle, and then the transmission plate and the cam are linked. The transmission plate drives the pull rod to move up and down in the vertical direction. However, in actual use of such a transmission structure, when the transmission mechanism drives the pull rod to lift, the pull rod will slide downward due to the gravity of the sliding door. Therefore, the handle can only be manually held to prevent the pull rod from being affected by the gravity of the sliding door to drive the cam to rotate in the opposite direction, so that the sliding door is kept in the lifted state and pushed, which is very inconvenient to operate. Summary of the invention

[0004] The purpose of the present invention is to provide a self-locking structure for lifting a pull rod of a lifting sliding door, so as to solve the problem in the prior art that after the pull rod is lifted, due to the influence of the weight of the sliding door, the pull rod is easily affected by the gravity of the sliding door itself and pulls the transmission mechanism in the opposite direction to make it slide down, resulting in the sliding door being unable to maintain a lifted state when the handle is released.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A pull rod lifting self-locking structure for lifting a sliding door, comprising:

[0007] The lock body is provided with a transmission mechanism, the transmission mechanism includes a cam and a transmission plate, the transmission plate is generally Z-shaped, the transmission plate includes a plate body, a hook portion arranged at the head of the plate body, and a connecting portion arranged at the tail of the plate body, the cam is hinged to the connecting portion;

[0008] A handle is provided with a rotating shaft that matches the shaft hole of the cam;

[0009] A fixing plate, fixedly connected to the lock body;

[0010] A pull rod is arranged between the fixing plate and the lock body, and a hook hole is formed on the pull rod;

[0011] Among them, the hook part is loosely matched with the hook hole, the connecting part is hinged to the cam, the handle drives the cam, the transmission plate and the pull rod to move upward or downward relative to the fixed plate in the vertical direction, and the cam reciprocates between the first position and the second position.

[0012] As a further solution of the present invention: the hook portion has a supporting plane, and the hook hole has a contact plane located on the top wall and contacting with the supporting plane.

[0013] As a further solution of the present invention: the hook portion and the connecting portion are both perpendicular to the plate body.

[0014] As a further solution of the present invention: the connecting portion and the plate body are smoothly transitioned.

[0015] As a further solution of the present invention: a hidden groove is provided on the front surface of the pull rod, the hook hole is provided on the bottom wall of the hidden groove, and the portion of the hook portion passing through the hook hole is located in the hidden groove.

[0016] As a further solution of the present invention: a protrusion is arranged on the back of the pull rod, the hook hole passes through the protrusion, and the neck section of the plate body is bent to form an arc groove for giving way to the protrusion.

[0017] As a further solution of the present invention: a clamping groove is arranged on the neck section of the hook portion, the hook hole is sleeved on the clamping groove, and along the axial direction of the hook hole, the hook hole and the clamping groove are loosely matched.

[0018] As a further solution of the present invention: the lock body further comprises a pair of support plates fixedly connected to the fixing plate, and the cam is arranged between the pair of support plates and rotatably connected to the pair of support plates.

[0019] As a further solution of the present invention: mounting holes are provided on the two support plates, mounting rings matching the mounting holes are provided on both sides of the cam, the mounting rings are coaxially arranged with the camshaft holes, and when the cam rotates, the mounting rings rotate relative to the mounting holes in the mounting holes.

[0020] As a further solution of the present invention: a first stopper and a second stopper are provided on the inner sides of the pair of support plates; when the cam is located at the first position, the cam abuts against the first stopper; when the cam is located at the second position, the second stopper abuts against the second stopper.

[0021] Beneficial effects of the present invention: The present application provides a transmission plate with a hook portion and a connecting portion, a pull rod with a hook hole, and a cam hinged to the connecting portion of the transmission plate, so that the transmission plate and the pull rod are directly connected by being hooked in the hook hole through the hook portion, so that the transmission plate and the pull rod cannot rotate relative to each other. At this time, the cam is driven to reciprocate between the first position and the second position by the handle, so that the pull rod can be driven to move upward or downward relative to the fixed plate in the vertical direction, and when the cam is rotated to the second position, a self-locking structure is formed between the pull rod, the transmission plate and the cam, so that the pull rod moves to the highest point and is supported and fixed by the transmission plate, and the pull rod cannot slide downward by itself under the action of gravity, and the sliding door can be maintained in a lifted state without manually holding the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the transmission plate in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the pull rod in the present invention;

[0027] Figure 5 is a schematic structural diagram of the convex block in the second position in the present invention;

[0028] Figure 6 It is a schematic structural diagram of the convex block in the present invention being in the first position. DETAILED DESCRIPTION

[0029] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0030] See also Figure 1As shown, the present invention is a pull rod lifting self-locking structure for lifting sliding door, including a lock body 1 and a handle 2. A transmission mechanism 3 is arranged inside the lock body 1, and the handle 2 is connected to the transmission mechanism 3. The handle 2 can rotate up and down relatively. A pull rod 4 and a fixed plate 5 are also arranged on the outside of the lock body 1 in sequence. The fixed plate 5 is fixedly connected to the lock body 1 to keep the lock body 1 stable and form a protective shell of the sliding door lock to prevent the sliding door lock from being scratched. The fixed plate 5 is in the shape of a U-shaped groove. The pull rod 4 is arranged between the fixed plate 5 and the lock body 1 and is located in the U-shaped groove of the fixed plate 5. The transmission mechanism 3 is directly connected to the pull rod 4. By rotating the handle 2, the pull rod 4 can be moved upward or downward relative to the fixed plate 5 in a straight line direction.

[0031] See also Figure 2-3 As shown, the transmission mechanism 3 in the lock body 1 includes a cam 31 and a transmission plate 32. The transmission plate 32 is generally Z-shaped, including a plate body 321, a hook portion 322 arranged at the head of the plate body 321, and a connecting portion 323 arranged at the tail of the plate body 321. A hook hole 41 is provided on the pull rod 4. The transmission plate 32 and the pull rod 4 are hooked by hooking the hook portion 322 on the hook hole 41. The hook portion 322 and the hook hole 41 are clearance-matched, so that the transmission plate 32 does not separate from the hook hole 41 and can move synchronously with the cam 31. By directly connecting the transmission plate 32 and the pull rod 4 through the hook connection, compared with the hinged connection between the transmission plate 32 and the pull rod 4, the relative rotation between the transmission plate 32 and the pull rod 4 is effectively avoided. The cam 31 and the connecting portion 323 are both provided with corresponding openings. The opening on the cam 31 is aligned with the opening on the connecting portion 323. The connecting shaft 33 passes through the opening to hinge the transmission plate 32 and the cam 31. The connecting shaft 33 and the opening on the cam 31 are interference-fitted. The cam 31 has an axial hole 311 for the handle 2 to be inserted. The rotating shaft 21 of the handle 2 is assembled into the axial hole 311. When the handle 2 rotates, the cam 31 and the transmission plate 32 can be driven to move in conjunction. The transmission plate 32 applies force to the pull rod 4, so that the pull rod 4 moves up and down relative to the fixed plate 5 in the vertical direction.

[0032] The handle 2 can drive the cam 31 to reciprocate between the first position and the second position. When the cam 31 is in the first position (see Figure 6 ), the hinge point of the cam 31 and the transmission plate 32 is located directly below the shaft hole 311 of the cam 31, the pull rod 4 slides down to the lowest point, and the sliding door is in a falling state and cannot be pushed; when the cam 31 is in the second position (see Figure 5 ), the hinge point of the cam 31 and the transmission plate 32 is located just above the shaft hole 311 of the cam 31, and a self-locking structure is formed between the pull rod 4, the transmission plate 32 and the cam 31, so that the pull rod 4 is locked at the highest point and cannot slide down by itself, and the sliding door remains in the lifted state and can be easily pushed.

[0033] See also Figure 1 and Figure 5As shown, specifically in this embodiment, the lock body 1 further includes a pair of support plates 11 fixedly connected to the fixing plate 5, and the cam 31 is disposed between the pair of support plates 11 and rotatably connected to the pair of support plates 11. Further, mounting holes are disposed on both support plates 11, and mounting rings 312 matching the mounting holes are fixedly disposed on both sides of the cam 31. The mounting ring 312 is coaxially disposed with the shaft hole 311 of the cam 31, and the mounting ring 312 is inserted into the mounting hole. When the cam 31 rotates, the mounting ring 312 rotates relative to the mounting hole.

[0034] A first stop block 12 and a second stop block 13 are provided on the inner side of a pair of support plates 11. When the cam 31 is located at the first position, the cam 31 abuts against the first stop block 12 and is stopped to limit the further rotation of the cam 31, thereby limiting the lowering of the pull rod 4 to the lowest point; when the cam 31 is located at the second position, the second stop block 13 abuts against the second stop block 13 and is stopped to limit the further rotation of the cam 31, thereby limiting the rising of the pull rod 4 to the highest point.

[0035] See also Figure 3 As shown, the hook portion 322 and the connecting portion 323 are perpendicular to the plate body 321, which improves the stability of the transmission plate 32 when supporting the pull rod 4, and further prevents the transmission plate 32 from being pulled in the opposite direction by the pull rod 4. The connecting portion 323 and the plate body 321 have a smooth transition, which prevents the corners of the connecting portion 323 and the plate body 321 from touching the pull rod 4 when the cam 31 drives the transmission plate 32 to move, thereby reducing the distance between the cam 31 and the pull rod 4.

[0036] See also Figure 3 and Figure 4 As shown, the hook portion 322 has a supporting plane 3221, and the hook hole 41 has an abutting plane 411 located on the top wall and abutting the supporting plane 3221. When the transmission plate 32 drives the pull rod 4 to rise and fall, the supporting plane 3221 abuts against the abutting plane 411, so that the transmission plate 32 supports the pull rod 4 to rise and fall vertically, thereby reducing the friction resistance between the pull rod 4 and the fixed plate 5 during the lifting process. Specifically in the present embodiment, the hook hole 41 is rectangular, and the inner top wall of the hook hole 41 is set to the abutting plane 411; the hook portion 322 has a neck section inserted into the hook hole 41, the cross-section of the neck section of the hook portion 322 is rectangular, and the top surface of the neck section of the hook portion 322 is set to the supporting plane 3221.

[0037] See also Figure 2-4As shown, a slot 3222 is provided on the neck section of the hook portion 322, and one end of the slot 3222 extends to the hook head of the hook portion 322, and the hook hole 41 is sleeved on the slot 3222, and along the axial direction of the hook hole 41, the gap between the hook hole 41 and the slot 3222 is matched, so that the transmission plate 32 can move normally relative to the pull rod 4 when the pull rod 4 is raised or lowered, and at the same time, the movement of the pull rod 4 is limited, and the pull rod 4 is further kept in a vertical state during the lifting process, thereby avoiding the pull rod 4 from tilting and scratching with the fixed plate 5, thereby avoiding the jamming phenomenon of the rotation of the handle 2, making the operation feel more stable, and improving the user experience.

[0038] A hidden groove 42 is provided on the front side of the pull rod 4, and a hook hole 41 is provided on the bottom wall of the hidden groove 42. After the hook portion 322 cooperates with the hook hole 41, the neck section of the hook portion 322 passes through the hook hole 41, and the hook head of the hook portion 322 is located in the hidden groove 42, thereby preventing the hook head section of the hook portion 322 from extending out of the hidden groove 42 to interfere with the front side of the pull rod 4 from fitting onto the fixed plate 5.

[0039] See also Figure 3 and Figure 6 As shown, a protrusion 43 is provided on the back of the pull rod 4, and the hook hole 41 passes through the protrusion 43. The length of the hook hole 41 along the axial direction increases the contact area between the hook hole 41 and the hook part 322, slows down the rate of mutual wear between the hook hole 41 and the hook part 322, and increases the service life. The neck section of the plate body 321 is bent to form a clearance arc groove 3211 for the protrusion 43 to give way, so as to avoid the transmission plate 32 and the pull rod 4 from being too close to each other and scratching the protrusion 43 during the movement of the transmission plate 32.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A self-locking structure for lifting a pull rod of a lifting sliding door, characterized in that: include: The lock body is provided with a transmission mechanism, the transmission mechanism includes a cam and a transmission plate, the transmission plate is Z-shaped, the transmission plate includes a plate body, a hook portion arranged at the head of the plate body, and a connecting portion arranged at the tail of the plate body, and the cam is hinged to the connecting portion; A handle is provided with a rotating shaft that matches the shaft hole of the cam; A fixing plate, fixedly connected to the lock body; A pull rod is arranged between the fixing plate and the lock body, and a hook hole is formed on the pull rod; Among them, the hook portion and the hook hole are gap-matched, the connecting portion is hinged to the cam, and the handle drives the cam, the transmission plate and the pull rod to work in conjunction, so that the cam reciprocates between the first position and the second position and thereby drives the pull rod to slide up and down. When the cam is in the second position, the transmission plate moves to the highest point and is supported and fixed by the pull rod. The hinge point between the cam and the transmission plate is located directly above the camshaft hole, and a self-locking structure is formed between the pull rod, the transmission plate and the cam.

2. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: The hook portion has a supporting plane, and the hook hole has a contact plane located on the top wall and contacting with the supporting plane.

3. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: The hook portion and the connecting portion are both perpendicular to the plate body.

4. The pull rod lifting self-locking structure of a lifting sliding door according to claim 1, characterized in that: The connecting portion and the plate body are smoothly transitioned.

5. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: A hidden groove is provided on the front surface of the pull rod, the hook hole is provided on the bottom wall of the hidden groove, and the portion of the hook portion passing through the hook hole is located in the hidden groove.

6. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: A protrusion is arranged on the back of the pull rod, the hook hole passes through the protrusion, and the neck section of the plate body is bent to form an arc groove for the protrusion to give way.

7. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: A clamping groove is arranged on the neck section of the hook part, the hook hole is sleeved on the clamping groove, and along the axial direction of the hook hole, the hook hole and the clamping groove are clearance-matched.

8. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 1 is characterized in that: The lock body further comprises a pair of support plates fixedly connected to the fixing plate, and the cam is arranged between the pair of support plates and rotatably connected to the pair of support plates.

9. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 8, characterized in that: Mounting holes are arranged on the two support plates, mounting rings matching the mounting holes are arranged on both sides of the cam, the mounting rings are arranged coaxially with the camshaft holes, and when the cam rotates, the mounting rings rotate relative to the mounting holes in the mounting holes.

10. The pull rod lifting self-locking structure of the lifting and sliding door according to claim 8, characterized in that: A first stopper and a second stopper are disposed on inner sides of the pair of support plates. When the cam is located at the first position, the cam abuts against the first stopper; when the cam is located at the second position, the second stopper abuts against the second stopper.

Images