A door lock device that makes it easier to close the door

Abstract

The present invention provides a door lock device with labor-saving door closing, which includes an upper housing, a lower housing and a locking body. An installation cavity is formed inside the housing composed of the upper housing and the lower housing, and a locking body is arranged in the installation cavity. A lock hole for the door hook to insert is formed on the upper housing. The device further includes a driving plate and a spring. A driving plate is arranged on one side of the locking body, and a spring is arranged on the side of the driving plate facing away from the locking body. The spring applies a force to the driving plate towards the locking body for abutting. The locking body has an equidistant upper arc surface and a variable pitch lower arc surface. When the driving plate contacts different positions of the equidistant upper arc surface, the distance between the driving plate and the locking body axis of the locking body remains unchanged. When the driving plate contacts the variable pitch lower arc surface, under the action of the spring, an auxiliary door closing force is applied to the locking body. This door lock device not only has a small door closing force and is convenient to operate, but also can reset when closing the door after accidental triggering and does not require maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, and particularly to a door lock device with labor-saving closing.

Background Art

[0002] Currently, the door covers of household appliances are generally equipped with door lock devices. After the door is closed, the locking force provided by the door lock device keeps the door cover closed. When opening the door, the user can force it open with effort. However, the current door lock devices on the market have the following problems:

[0003] 1. The closing force is relatively large, resulting in a poor user experience when closing the door.

[0004] 2. After the door lock is accidentally triggered (especially when children play with other tools), the door cannot be closed again when closing the door, and it needs to be repaired by after-sales service to solve.

Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art, and propose a door lock device with labor-saving closing, which not only has a small closing force and is easy to operate, but also can be reset when closing the door after accidental triggering without maintenance.

[0006] To achieve the above purpose, the present invention proposes a door lock device with labor-saving closing, including an upper housing, a lower housing and a locking body. An installation cavity is provided inside the housing formed by the upper housing and the lower housing, and a locking body is arranged in the installation cavity. A lock hole for the door hook to insert is provided on the upper housing. It also includes a driving plate and a spring. A driving plate is provided on one side of the locking body, and a spring is arranged on the side of the driving plate facing away from the locking body. The spring applies a force to the driving plate towards the locking body to abut. The locking body has an equidistant upper arc surface and a variable-pitch lower arc surface. When the driving plate contacts different positions of the equidistant upper arc surface, the distance between the driving plate and the locking body axis of the locking body remains unchanged. When the driving plate contacts the variable-pitch lower arc surface, under the action of the spring, an auxiliary closing force is applied to the locking body.

[0007] Preferably, a sliding groove for the locking body to translate is also provided inside the housing. The locking body is movably installed in the sliding groove through a locking body axis. On the side of the locking hook of the locking body facing the lock hole, there is a reset driving surface. When the door hook abuts against the reset driving surface, a force for compressing the driving spring is applied to the locking body, so that the locking body is separated from abutting against the end wall of the sliding groove.

[0008] Preferably, the sliding groove is arranged along the moving direction of the driving plate.

[0009] Preferably, one end of the driving plate facing the locking body is provided with a driving plate retaining wall. When the driving plate contacts different positions of the equidistant upper arc surface, the driving plate retaining wall abuts against the equidistant upper arc surface. On the side of the driving plate retaining wall facing the lock hole, there is a driving plate ramp. When the driving plate ramp abuts against the variable pitch lower arc surface, an auxiliary door-closing force is applied to the locking body.

[0010] Preferably, a lock hook extends from the side of the locking body where the equidistant upper arc surface is provided, and a crank extends from one end of the locking body where the variable pitch lower arc surface is provided. When the door hook abuts against the crank of the locking body, a force is applied to drive the locking body to rotate and lock the door.

[0011] Preferably, it further includes a switch operation board and a switch assembly. The switch operation board is swingably installed in the housing and includes a trigger support plate and a driving support plate. The driving support plate is linked with the driving plate. The switch operation board swings under the action of the driving plate and controls the switch assembly to close or open through the trigger support plate.

[0012] Preferably, an operation board driving groove is formed on the side of the driving plate facing the switch operation board. The end of the driving support plate is provided with a push rod, and the push rod is inserted into the operation board driving groove. Under the action of the driving plate, the switch operation board is controlled to swing.

[0013] Advantages of the present invention:

[0014] 1. By providing an equidistant upper arc surface on the locking body, when the door hook is inserted, only the friction force of the upper arc surface needs to be overcome, and the door-closing force is relatively small. Moreover, when the variable pitch lower arc surface of the locking body contacts the ramp of the driving plate, under the action of the spring, the resultant force between the two pushes the locking body to rotate, assisting in closing the door. The door-closing force is small, and the user experience is better.

[0015] 2. When the locking body of the door lock is accidentally triggered and locked by other tools, when the user closes the door, the locking body moves along the sliding groove until the door hook is completely inserted into the locking body, realizing the reset when closing the door again, without after-sales maintenance.

[0016] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Description of the Drawings

[0017] Figure 1 is an exploded view of a door lock device with labor-saving door closing of the present invention;

[0018] Figure 2 is a top view schematic diagram of a door lock device with labor-saving door closing of the present invention;

[0019] Figure 3 is a cross-sectional view of the cooperation relationship between the driving plate and the locking body in the door-opening state of the present invention;

[0020] Figure 4 It is a cross-sectional view of the cooperation relationship between the sliding groove and the locking body in the open door state of the present invention;

[0021] Figure 5 It is a cross-sectional view of the closing action of the present invention;

[0022] Figure 6 It is a cross-sectional view of the cooperation relationship between the driving plate and the locking body when the locking body is in the closed door position;

[0023] Figure 7 It is a schematic diagram of the cooperation relationship between the switch operation board and the switch assembly when the locking body is in the closed door position;

[0024] Figure 8 It is a cross-sectional view of the opening action of the present invention;

[0025] Figure 9 It is a cross-sectional view of the action of inserting the door hook during the closing of the door in the abnormal state of the present invention;

[0026] Figure 10 It is a cross-sectional view after the door hook is inserted during the closing of the door in the abnormal state of the present invention;

[0027] Figure 11 It is a schematic structural diagram of the locking body of a door lock device with labor-saving closing of the present invention;

[0028] Figure 12 It is a schematic structural diagram of the driving plate of a door lock device with labor-saving closing of the present invention;

[0029] Figure 13 It is a schematic structural diagram of the switch operation board of a door lock device with labor-saving closing of the present invention.

Specific Embodiments

[0030] Referring to Figures 1 to 5 , a door lock device with labor-saving closing of the present invention includes an upper housing 1, a lower housing 2 and a locking body 3. An installation cavity is provided inside the housing formed by the upper housing 1 and the lower housing 2. The locking body 3 is arranged in the installation cavity. A lock hole 10 for inserting a door hook 100 is provided on the upper housing 1. It further includes a driving plate 4 and a spring 5. A driving plate 4 is arranged on one side of the locking body 3. A spring 5 is arranged on the side of the driving plate 4 facing away from the locking body 3. The spring 5 exerts a force on the driving plate 4 towards the locking body 3 for abutting. The locking body 3 has an equidistant upper arc surface 31 and a variable-pitch lower arc surface 32. When the driving plate 4 contacts different positions of the equidistant upper arc surface 31, the distance between the driving plate 4 and the locking body axis 33 of the locking body 3 remains unchanged. When the driving plate 4 contacts the variable-pitch lower arc surface 32, under the action of the spring 5, an auxiliary closing force is exerted on the locking body 3.

[0031] Furthermore, referring toFigure 4 and Figure 11 A sliding groove 11 for the locking body 3 to translate is further provided in the housing. The locking body 3 is movably installed in the sliding groove 11 through a locking body shaft 33. On one side of the locking hook 34 of the locking body 3 facing the locking hole 10, there is a reset driving surface 341. When the door hook 100 abuts against the reset driving surface 341, a force for compressing the driving spring 5 is applied to the locking body 3, causing the locking body 3 to disengage from abutting against the end wall of the sliding groove 11. In this embodiment, the sliding groove 11 is arranged along the moving direction of the driving plate 4.

[0032] Further, referring to Figure 5 and Figure 12 One end of the driving plate 4 facing the locking body 3 is provided with a driving plate retaining wall 41. When the driving plate 4 contacts different positions of the equally spaced upper arc surface 31, the driving plate retaining wall 41 abuts against the equally spaced upper arc surface 31. On one side of the driving plate retaining wall 41 facing the locking hole 10, there is a driving plate ramp 42. When the driving plate ramp 42 abuts against the variable pitch lower arc surface 32, an auxiliary closing force is applied to the locking body 3.

[0033] Further, referring to Figure 3 and Figure 11 A locking hook 34 extends from one side of the locking body 3 where the equally spaced upper arc surface 31 is provided, and a crank 35 extends from one end of the locking body 3 where the variable pitch lower arc surface 32 is provided. When the door hook 100 abuts against the crank 35 of the locking body 3, a force for driving it to rotate and lock the door is applied to the locking body 3.

[0034] Further, referring to Figures 1 to 7 It further includes a switch operation board 6 and a switch assembly 7. The switch operation board 6 is swingably installed in the housing and includes a trigger support plate 61 and a driving support plate 62. The driving support plate 62 is linked with the driving plate 4. The switch operation board 6 swings under the action of the driving plate 4 and controls the switch assembly 7 to be closed or opened through the trigger support plate 61. In this embodiment, an operation board driving groove 43 is formed on one side of the driving plate 4 facing the switch operation board 6. One end of the driving support plate 62 is provided with a push rod 621. The push rod 621 is inserted into the operation board driving groove 43, and under the action of the driving plate 4, it controls the switch operation board 6 to swing.

[0035] The working process of the present invention includes the following parts:

[0036] 1. Referring to Figure 3 and Figure 4, Door open state: Under the action of the spring 5, the drive plate retaining wall 41 of the drive plate 4 abuts against the equidistant upper arc surface 31 of the locking body 3. Since the equidistant upper arc surface 31 is equidistant, the locking body 3 can maintain its open position unchanged. Moreover, the locking body shaft 33 of the locking body 3 abuts against the wall of the sliding groove 11 of the upper housing 1.

[0037] 2. Refer to Figure 5 , Door closed state: After the door hook 100 is inserted, the locking body 3 is driven to rotate. Since the equidistant upper arc surface 31 is an equidistant arc surface, when the door hook 100 is inserted, only the frictional force of the equidistant upper arc surface 31 needs to be overcome, and the closing force is relatively small. When the equidistant upper arc surface 31 of the locking body 3 leaves the drive plate retaining wall 41 of the drive plate 4, the variable pitch lower arc surface 32 of the locking body 3 contacts the drive plate ramp 42. Under the action of the spring 5, the resultant force between the two drives the locking body 3 to rotate to assist in closing the door. After closing the door, the closing force is very large and can keep the door cover of the household appliance closed.

[0038] 3. Refer to Figure 6 and Figure 7 , After closing the door, the drive plate 4 releases the acting force on the switch operation board 6, and the switch assembly 7 resets and closes to conduct.

[0039] 4. Refer to Figure 8 , When opening the door, the locking body 3 rotates. The variable pitch lower arc surface 32 of the locking body 3 acts on the drive plate ramp 42 and causes the drive plate 4 to compress the spring 5 and retreat until the equidistant upper arc surface 31 of the locking body 3 contacts the drive plate retaining wall 41. When the door hook 100 is completely pulled out, the locking body 3 remains in the open position.

[0040] 5. Refer to Figure 9 and Figure 10 , Abnormal state closing action: When the locking body 3 of the door lock is accidentally triggered and locked by other tools, when the user closes the door, the locking body 3 moves along the sliding groove 11 and acts on the drive plate 4 to make it retreat until the door hook 100 is completely inserted into the locking body 3, and the locking body 3 moves along the sliding groove 11 to reset.

[0041] The above embodiments are illustrative of the present invention, not limiting of the present invention. Any simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A door lock device with labor-saving door closing, comprising an upper housing (1), a lower housing (2) and a locking body (3). An installation cavity is formed inside the housing composed of the upper housing (1) and the lower housing (2), and the locking body (3) is arranged in the installation cavity. A lock hole (10) through which a door hook (100) can be inserted is formed in the upper housing (1). It is characterized in that: It further includes a drive plate (4) and a spring (5). One side of the locking body (3) is provided with a drive plate (4), and a spring (5) is arranged on the side of the drive plate (4) facing away from the locking body (3). The spring (5) exerts a force on the drive plate (4) towards the locking body (3) for abutment. The locking body (3) has an equidistant upper arc surface (31) and a variable-pitch lower arc surface (32). When the drive plate (4) contacts different positions of the equidistant upper arc surface (31), the distance between the drive plate (4) and the locking body axis (33) of the locking body (3) remains unchanged. When the drive plate (4) contacts the variable-pitch lower arc surface (32), under the action of the spring (5), a force for assisting in closing the door is exerted on the locking body (3). A sliding groove (11) for the locking body (3) to translate is further provided in the housing. The locking body (3) is movably installed in the sliding groove (11) through a locking body axis (33). On the side of the locking hook (34) of the locking body (3) facing the lock hole (10), there is a reset drive surface (341). When the door hook (100) abuts against the reset drive surface (341), a force for compressing the drive spring (5) is exerted on the locking body (3), causing the locking body (3) to disengage from abutting against the end wall of the sliding groove (11). One end of the drive plate (4) facing the locking body (3) is provided with a drive plate stop wall (41). When the drive plate (4) contacts different positions of the equidistant upper arc surface (31), the drive plate stop wall (41) abuts against the equidistant upper arc surface (31). On the side of the drive plate stop wall (41) facing the lock hole (10), there is a drive plate ramp (42). When the drive plate ramp (42) abuts against the variable-pitch lower arc surface (32), a force for assisting in closing the door is exerted on the locking body (3).

2. The door lock device with labor-saving door closing according to claim 1, characterized in that: The sliding groove (11) is arranged along the moving direction of the drive plate (4).

3. A door lock device with labor-saving door closing as claimed in claim 1, characterized in that: On one side of the locking body (3) where the equidistant upper arc surface (31) is provided, a locking hook (34) extends. At one end of the locking body (3) where the variable-pitch lower arc surface (32) is provided, a crank (35) extends. When the door hook (100) abuts against the crank (35) of the locking body (3), a force for driving it to rotate and lock the door is exerted on the locking body (3).

4. A door lock device with labor-saving door closing according to any one of claims 1 to 3, characterized in that: It further includes a switch operation board (6) and a switch assembly (7). The switch operation board (6) is swingably installed in the housing and includes a trigger support plate (61) and a drive support plate (62). The drive support plate (62) is linked with the drive plate (4). The switch operation board (6) swings under the action of the drive plate (4) and controls the switch assembly (7) to close or open through the trigger support plate (61).

5. The door lock device with labor-saving door closing according to claim 4, characterized in that: On the side of the drive plate (4) facing the switch operation board (6), an operation board drive groove (43) is formed. At the end of the drive support plate (62), there is a push rod (621). The push rod (621) is inserted into the operation board drive groove (43). Under the action of the drive plate (4), the switch operation board (6) is controlled to swing.

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