Three-stage door lock push rod

Abstract

The application discloses a three-section door lock push rod, which comprises a first push rod, a second push rod, a push rod connecting block, a machine shell and a driving mechanism, the push rod connecting block is located between the first push rod and the second push rod, the driving mechanism can drive the first push rod to move horizontally to adjust the length of the first push rod and the second push rod extending out of the machine shell on one hand and cooperate with the push rod connecting block to adjust the horizontal distance between the first push rod and the second push rod on the other hand, different forms can be formed under the locked state and the unlocked state of the door lock and cooperate with a triggering mechanism, so that the force required to overcome the spring when closing the door is effectively reduced, and the user experience is improved.

Description

[Technical Field]

[0001] This invention relates to the technical field of door lock push rods, and in particular to the technical field of three-section door lock push rods. [Background Technology]

[0002] Currently, most household appliance doors are equipped with locks to provide locking force after the door is closed. Existing locks typically include a push rod and a trigger mechanism. The push rod activates the trigger mechanism to lock and unlock the door, as illustrated in the invention patent CN215761013U, which discloses an electric push-button door lock. However, because the push rod is a single, integrated structure with no difference in shape between the locked and unlocked states, it requires considerable force to overcome the springs within the lock when closing, resulting in a strenuous and cumbersome experience and a poor user experience. This situation urgently needs improvement. [Summary of the Invention]

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a three-section door lock push rod that can form different shapes in the locked and unlocked states of the door lock and cooperate with the triggering mechanism, thereby effectively reducing the force required to overcome the spring when closing the door and improving the user experience.

[0004] To achieve the above objectives, the present invention proposes a three-section door lock push rod, including a first push rod, a second push rod, a push rod connecting block, a housing, and a drive mechanism. The push rod connecting block is located between the first push rod and the second push rod. The drive mechanism can drive the first push rod to move horizontally to adjust the length of the first and second push rods extending out of the housing on the one hand, and cooperate with the push rod connecting block on the other hand to adjust the horizontal distance between the first and second push rods.

[0005] Preferably, a slot is provided between the first push rod and the second push rod, the slot being such that the first push rod and the second push rod can only slide relative to each other in the horizontal direction.

[0006] Preferably, a second groove is provided between the push rod connecting block and the first push rod, the second groove causing the push rod connecting block and the first push rod to interlock and slide relative to each other only along the direction of the second groove; a third groove is provided between the push rod connecting block and the second push rod, the third groove causing the push rod connecting block and the second push rod to interlock and slide relative to each other only along the direction of the third groove.

[0007] Preferably, the second slot and the third slot are not parallel.

[0008] Preferably, the housing is provided with a guide mechanism, and the push rod connecting block is provided with a boss or groove corresponding to the guide mechanism.

[0009] Preferably, the driving mechanism includes a motor and a transmission mechanism. The left ends of the second push rod and the first push rod are both located in the movable chamber of the housing, while the right ends of both push rods extend out of the housing along the housing outlet. The motor indirectly drives the first push rod to move horizontally through the transmission mechanism. The right end of the first push rod is provided with a pusher.

[0010] Preferably, the pusher retracts and does not protrude beyond the right end of the second pusher when the first pusher moves to the left to its full position, and the pusher can protrude beyond the right end of the second pusher after moving a certain distance to the right.

[0011] The beneficial effects of this invention are:

[0012] 1) By using push rod No. 1, push rod No. 2 and push rod connecting block together, the drive mechanism can be used to drive push rod No. 1 to move horizontally. This allows for adjustment of the length of the right end of push rod No. 1 and push rod No. 2 extending out of the housing, as well as the length of the right end of push rod No. 2 extending out of push rod No. 2. Ultimately, the three-section door lock push rod forms different shapes in the locked and unlocked states of the door lock and cooperates with the trigger mechanism, effectively reducing the force required to overcome the spring when closing the door and improving the user experience.

[0013] 2) By using a worm gear, turbine, and gear together to form a transmission mechanism that works with the motor, and by making the first push rod and the second push rod horizontally slidable to the housing, the overall structure is simple, occupies less space, and can stably transmit the output power of the motor to the first push rod, while ensuring the smooth horizontal sliding of the first and second push rods.

[0014] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. [Attached Image Description]

[0015] Figure 1 This is a schematic diagram of the operation of the three-section door lock push rod of the present invention when it is retracted;

[0016] Figure 2 yes Figure 1 An enlarged view of point A;

[0017] Figure 3 This is a schematic diagram of the operation of the three-section door lock push rod of the present invention when it is released;

[0018] Figure 4 yes Figure 3 An enlarged view of point B;

[0019] Figure 5 yes Figure 3 An enlarged view of point C;

[0020] Figure 6This is a cross-sectional view of the first push rod, the second push rod, and the push rod connecting block during assembly of the three-section door lock push rod.

[0021] In the diagram: 1-Push rod No. 1, 11-Protrusion No. 1, 111-Sloping surface of block No. 1, 12-First sloping surface of rod No. 1, 13-Rod teeth, 2-Push rod No. 2, 21-Protrusion No. 2, 211-Sloping surface of block No. 2, 22-Sloping surface of rod No. 2, 3-Push rod connecting block, 4-Housing, 41-Cavity of the machine body, 42-Transmission chamber, 43-Moving chamber, 5-Motor, 6-Transmission mechanism, 61-Worm, 62-Turbine, 63-Gear, 7-Pusher, 8-Slot No. 1, 9-Slot No. 2, 10-Slot No. 3.

Detailed Implementation Methods

[0022] See Figures 1 to 6 The present invention relates to a three-section door lock push rod, comprising a first push rod 1, a second push rod 2, a push rod connecting block 3, a housing 4, and a drive mechanism. The push rod connecting block 3 is located between the first push rod 1 and the second push rod 2. The drive mechanism can drive the first push rod 1 to move horizontally to adjust the length of the first push rod 1 and the second push rod 2 extending beyond the housing 4, and to cooperate with the push rod connecting block 3 to adjust the horizontal distance between the first push rod 1 and the second push rod 2.

[0023] A slot 8 is provided between the first push rod 1 and the second push rod 2, which allows the first push rod 1 and the second push rod 2 to interlock and slide relative to each other only in the horizontal direction.

[0024] A second groove 9 is provided between the push rod connecting block 3 and the first push rod 1. The second groove 9 allows the push rod connecting block 3 and the first push rod 1 to interlock and slide relative to each other only along the direction of the second groove 9. A third groove 10 is provided between the push rod connecting block 3 and the second push rod 2. The third groove 10 allows the push rod connecting block 3 and the second push rod 2 to interlock and slide relative to each other only along the direction of the third groove 10.

[0025] The second slot 9 and the third slot 10 are not parallel. With this design, since there is an angle between the second slot 9 and the third slot 10, when the push rod connecting block 3 is displaced in a direction perpendicular to the movement direction of the first push rod 1 and the second push rod 2, the horizontal distance between the first push rod 1 and the second push rod 2 can be changed simultaneously.

[0026] The driving mechanism includes a motor 5 and a transmission mechanism 6. The left ends of the second push rod 2 and the first push rod 1 are both located in the movable chamber 43 of the housing 4, while the right ends of both extend out of the housing 4 along the housing outlet. The motor 5 indirectly drives the first push rod 1 to move horizontally through the transmission mechanism 6. The right end of the first push rod 1 is provided with a pusher 7.

[0027] The pusher 7 retracts and does not protrude from the right end of the second pusher 2 when the first pusher 1 moves to the left to its end. After moving a certain distance to the right, the pusher 7 can protrude from the right end of the second pusher 2.

[0028] A guide mechanism is provided on the housing 4, and a boss or groove corresponding to the guide mechanism is provided on the push rod connecting block 3. This design causes the push rod connecting block 3 to undergo vertical displacement when it moves horizontally to a certain position, thereby changing the horizontal distance between the first push rod 1 and the second push rod 2, so that the pusher 7 protrudes or retracts relative to the right end of the second push rod 2.

[0029] The left end of the first push rod 1 is provided with an upward protruding first protrusion 11, and the right side of the first protrusion 11 is provided with a first block inclined surface 111. The push rod connecting block 3 is triangular, and the left side is a third rod inclined surface that matches and fits the slope of the first block inclined surface 111, while the right end is supported by the left end of the second push rod 2. The right end of the second push rod 2 is provided with a downward protruding second protrusion 21.

[0030] The second protrusion 21 has a second block inclined surface 211 on its left side, and the first push rod 1 has a first rod body inclined surface 12 on its right end that matches and fits the slope of the second block inclined surface 211.

[0031] The second push rod 2 has a second oblique cut at the lower left corner, forming a second rod body inclined surface 22. The slope of the second rod body inclined surface 22 is matched with the slope of the first block inclined surface 111.

[0032] Within the housing 4 and below the movable chamber 43, there are sequentially connected body chambers 41 and transmission chambers 42, each housing a motor 5 and a transmission mechanism 6 respectively. The transmission mechanism 6 includes a worm gear 61, a turbine gear 62, and gears 63. The worm gear 61 is coaxially fixed to the output shaft of the motor 5. The turbine gear 62 and several gears 63 are rotatably connected to the housing 4 via rotating shafts. The gears 63 are arranged sequentially from top to bottom and mesh with each other. The turbine gear 62 meshes with both the worm gear 61 and the lowest gear 63. The bottom surface of the first push rod 1 has several horizontally arranged rod teeth 13, and the highest gear 63 meshes with the first push rod 1.

[0033] Working process of this invention:

[0034] See Figure 1 and Figure 2When the three-section door lock push rod is in the retracted state, the left ends of push rod 1 and push rod 2 are located in the deeper left side of the active chamber. The spacing between slot 2 9 and slot 3 10 is small in the direction close to push rod 1 and push rod 2, and large in the direction far from push rod 1 and push rod 2. The guide mechanism makes the push rod connecting block 3 close to push rod 1 and push rod 2, increasing the distance between push rod 1 and push rod 2, and causing the right end of pusher 7 to retract into push rod 2.

[0035] See Figure 3 , Figure 4 and Figure 5 When the three-section door lock push rod needs to be switched from the retracted state to the extended state, the motor 5 is directly started to drive the worm gear 61 to rotate. At the same time, the worm gear 61 drives the worm wheel 62 and each gear 63 to rotate, thereby causing the first push rod 1 to gradually move to the right. During this process, the push rod connecting block 3 moves to the right under the push of the first push rod and gradually moves upward under the action of the guide mechanism. This firstly shortens the distance between the first push rod 1 and the second push rod 2, and the right end of the pusher 7 gradually extends beyond the second push rod 2. Then, the second push rod 2 moves to the right together with the first push rod 1.

[0036] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A three-section door lock push rod, characterized in that: It includes a first push rod (1), a second push rod (2), a push rod connecting block (3), a housing (4), and a drive mechanism. The push rod connecting block (3) is located between the first push rod (1) and the second push rod (2). The drive mechanism can drive the first push rod (1) to move horizontally to adjust the length of the first push rod (1) and the second push rod (2) extending out of the housing (4) on the one hand, and cooperate with the push rod connecting block (3) on the other hand to adjust the horizontal distance between the first push rod (1) and the second push rod (2). A slot 1 (8) is provided between the first push rod (1) and the second push rod (2), the slot 1 (8) allows the first push rod (1) and the second push rod (2) to interlock and slide relative to each other only in the horizontal direction; a slot 2 (9) is provided between the push rod connecting block (3) and the first push rod (1), the slot 2 (9) allows the push rod connecting block (3) and the first push rod (1) to interlock and slide relative to each other only along the direction of the slot 2 (9); a slot 3 (10) is provided between the push rod connecting block (3) and the second push rod (2), the slot 3 (10) allows the push rod connecting block (3) and the second push rod (2) to interlock and slide relative to each other only along the direction of the slot 3 (10); the slot 2 (9) and the slot 3 (10) are not parallel; The housing (4) is provided with a guide mechanism, and the push rod connecting block (3) is provided with a boss or groove corresponding to the guide mechanism.

2. The three-section door lock push rod as described in claim 1, characterized in that: The driving mechanism includes a motor (5) and a transmission mechanism (6). The left ends of the second push rod (2) and the first push rod (1) are both located in the active chamber (43) of the housing (4), while the right ends of both protrude out of the housing (4) along the housing outlet. The motor (5) indirectly drives the first push rod (1) to move horizontally through the transmission mechanism (6). The right end of the first push rod (1) is provided with a pusher (7).

3. The three-section door lock push rod as described in claim 2, characterized in that: The pusher (7) retracts and does not protrude from the right end of the second pusher (2) when the first pusher (1) moves to the left to the end. The pusher (7) can protrude from the right end of the second pusher (2) after moving a certain distance to the right.

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