CN219773889U - Latching devices and latching systems - Google Patents

Abstract

The utility model discloses a latch device, comprising: a housing; a moving member at least partially disposed in the housing and longitudinally movable relative to the housing between a locked position and an unlocked position, the moving member being at least partially located outside the housing when in the locked position; a cam member connected to the moving member and rotatable to drive the moving member to move; and a motor component comprising: a motor connected to the cam member and driving the cam member to rotate; the first switch is electrically connected to the motor, and when the moving part is located at the locking position, the first switch is triggered by the cam part to switch on the unlocking circuit, and when the moving part is located at the unlocking position, the first switch is triggered by the cam part to switch on the locking circuit, and the unlocking circuit and the locking circuit can be selectively powered to enable the motor to be driven. The utility model also discloses a latch system.

Description

Latching devices and latching systems

Technical field

The present application relates to a latching device and a latching system including the latching device.

Background technique

A latching device is a common device that has a variable structure or movable part to switch between a locked and unlocked state to lock or release a first item to a second item. In some applications, the latching device is driven by a drive device such as a motor. In such a case, a switching device or a detection device is required to determine the status of the latch device to avoid excessive movement of components of the latch device and to allow the user to know the status of the latch device.

Therefore, it would be desirable to provide a latching device that can be automatically controlled. Furthermore, it is desirable that the latch containing the switching device or detection device has a structure that is as simple and modular as possible.

Utility model content

A latch device according to the present application, used for locking a first object to a second object or releasing it from the second object, characterized in that the latch device includes: a housing; a moving part, at least partially disposed in the housing and capable of longitudinal movement relative to the housing between a locked position and an unlocked position, and when the moving member is in the locked position, it is at least partially located outside the housing ; Cam component, connected to the moving component, and capable of rotating to drive the moving component to move; and a motor component, including: a motor, connected to the cam component and driving the cam component to rotate; a first switch, electrically connected to the motor, when the moving part is in the locking position, the first switch is triggered by the cam part to turn on the unlocking circuit, and when the moving part is in the unlocking position, the first switch The switch is triggered by the cam component to turn on the locking circuit, and both the unlocking circuit and the locking circuit can be selectively powered to drive the motor.

In one embodiment, the unlocking circuit can be energized such that the moving component moves from the locked position to the unlocking position; the locking circuit can be energized such that the moving component moves from the unlocking position. to the locked position.

In one embodiment, the locking circuit is always energized; the unlocking circuit can be energized for a period of time such that the moving component moves from the locking position to the unlocking position and then back from the unlocking position to the unlocking position. the locked position.

In one embodiment, the cam component rotates around a transverse drive axis and includes: a first cam portion disposed on a side of the cam component away from the motor component and capable of driving the moving component; and The second cam part is provided on the side of the cam component close to the motor component and can contact the first switch.

In one embodiment, the first cam portion and the second cam portion are transversely extending protrusions, and the first cam portion and the second cam portion are offset along the rotation direction of the cam component. An angle.

In one embodiment, the first switch includes: a first contact disposed on a side of the first switch facing the moving component; and a first reed disposed between the first contact and between the second cam parts and extending generally transversely; the first reed contacts the first contact point when pressed by the second cam part, so that the first switch turns on the lock The circuit contacts another contact point when it is not pressed by the second cam portion, so that the first switch turns on the unlocking circuit.

In one embodiment, the moving component includes: a first end that can extend out of the housing when the moving component is in the locking position; a second end that is longitudinally connected to the third end. One end is opposite and located in the housing; and a cam groove, close to the second end, is recessed in the moving part along a transverse direction, and the cam part is inserted into the cam groove and can abut against the cam groove. The inner wall of the cam groove is used to drive the moving part.

In one embodiment, the cam groove runs transversely through the moving component and includes an arcuate front wall away from the second end and a linear rear wall close to the second end.

In one embodiment, the latch device further includes a second switch that is triggered by the moving component to send a locking status signal when the moving component is in the locking position.

In one embodiment, the moving part includes a switch engagement portion disposed near a longitudinal center of the moving part and as a transverse recess on a side wall of the moving part, when the moving part is located When the moving part is in the unlocking position, the side wall of the moving part corresponds to the second switch and is in contact with the second switch. When the moving part is in the unlocking position, the switch engaging part corresponds to the second switch. second switch and avoid the second switch.

In one embodiment, the second switch includes: a second contact disposed on a side of the second switch facing the moving component; and a second reed disposed between the second contact and the moving part. Between the moving parts and extending generally longitudinally, the second reed is disengaged from the second contact when not pressed, so that the second switch sends the locking state signal, and when the second reed is pressed by the When the side wall of the moving part is pressed, it contacts the second contact point, so that the second switch does not send out the locking state signal.

In one embodiment, the latch device further includes an elastic component disposed in the housing and biasing the moving component toward the locking position.

A latch system according to the present application, characterized in that the latch system includes: at least one first object; a second object, the first object can move to engage or disengage from the second object; and according to the present application The claimed latch device is provided on each of said first items.

Description of the drawings

Figures 1A to 1F are respectively a front view, a rear view, a left view, a right view, and a top view of the latch device according to the present application; Figures 1G and 1H are respectively three-dimensional views of the latch device from different angles;

Figure 2 is an exploded perspective view of the latch device;

Figures 3A and 3B are respectively perspective views of the first housing of the latch device from different angles;

Figures 4A and 4B are respectively perspective views of the second housing of the latch device from different angles;

Figures 5A and 5B are respectively perspective views of the moving parts of the latch device from different angles;

Figures 6A and 6B are respectively perspective views of the motor module of the latch device from different angles;

Figures 7A and 7B are respectively perspective views of the cam component of the latch device from different angles;

8A is a front view of a latch device system according to the present application with the first housing removed and with the latch device in a locked position;

Figure 8B is a partial enlarged view of the box in Figure 8A;

Figure 9 is a cross-sectional view taken along line A-A in Figure 8A;

Figure 10 is a cross-sectional view taken along line B-B in Figure 8A;

11A is a front view of a latching system according to the present application, with the first housing removed and with the latching device in an unlocked position;

Figure 11B is a partial enlarged view of the box in Figure 11A;

Figure 12 is a cross-sectional view taken along line C-C in Figure 11A;

Figure 13 is a cross-sectional view taken along line D-D in Figure 11A;

Figure 14 is a perspective view of a latch system according to the present application;

Figure 15 is a perspective view of two latching devices in the latching system according to the present application;

Figure 16A is a perspective view of a latching system according to the present application with the first component in an open position and the latching device in a released position;

Figure 16B is a partial enlarged view of the box in Figure 16A;

Figure 17A is a perspective view of a latching system according to the present application with the first component in an open position and the latching device in a locked position;

Figure 17B is a partial enlarged view of the box in Figure 17A;

Figure 18 shows a schematic circuit diagram according to the first control mode of the present application;

Figure 19 shows a schematic circuit diagram of the second control mode according to the present application.

List of reference signs:

1 latching system

100 latching device

110 housing

111 first shell

112 Moving parts slot

112a opening

113 motor slot

114 Installation Department

115 Second housing

120 moving parts

121 first end

122 Second end

123 Cam groove

123a front wall

123b rear wall

124 switch joint

125 side wall

130 Motor parts

131 motor

131a drive shaft

132 first switch

132a first contact

132b first reed

133 Second switch

133a Second contact

133b second reed

134 wire harness

140 Cam Parts

141 First cam part

142 Second cam part

150 elastic parts

160 unlocking circuit

170 lock circuit

200 first object

210 Hinged parts

300 Second Object

310 slot

400 external power supply

Detailed ways

Although the invention is illustrated and described herein with reference to specific embodiments, the invention should not be limited to the details shown. Rather, various modifications may be made in these details within the scope of equivalencies of the claims and without departing from the invention.

The descriptions of directions such as "front", "back", "up" and "down" involved in this article are only for convenience of understanding. The present invention is not limited to these directions, but can be adjusted according to actual conditions.

Referring to FIGS. 1A-2 , a latch device 100 according to the present application is generally described. The latch device 100 includes a housing 110, a moving component 120, a cam component 140, a motor component 130, and an elastic component 150.

The housing 110 at least partially houses other components of the latch device 100 and is used to mount the latch device 100 . The housing 110 may be composed of a first housing 111 and a second housing 115 to facilitate assembly of the latch device 100 . The moving part 120 is disposed in the housing 110 and can move longitudinally relative to the housing 110 between a locking position (Figs. 8A to 10) and an unlocking position (Figs. 11A to 14). When the moving part 120 is in the locking position When moving, it is at least partially located outside the housing 110. The moving manner of the moving component 120 will be described in detail later. The cam member 140 is connected to the moving member 120 and is rotatable to drive movement of the moving member 120 . The motor component 130 is used to drive the cam component 140 to rotate. The elastic component 150 is provided in the housing 110 for biasing the moving component 120 toward the locking position.

The specific structure of the first housing 111 is described with reference to FIGS. 3A and 3B.

The first housing 111 is in the shape of a box with one side open, and is provided with a moving component slot 112 and a motor slot 113 to accommodate the moving component 120 and the motor 131 respectively (see Figure 2). The moving part slot 112 extends longitudinally, and the motor slot 113 extends transversely. An opening 112a is provided on the side wall of the first housing 111, and one end of the moving component slot 112 leads to the outside of the housing 110 through the opening 112a. A plurality of mounting portions 114 such as screw holes are also provided on the outer periphery of the first housing 111 so that the housing 110 can be installed into an actual application environment, such as into the first object 200 (see Figures 8A and 8B). According to actual conditions, the shape of the outer periphery of the housing 110 and the arrangement of the mounting portion 114 can be changed accordingly.

Referring to Figures 4A and 4B, a second housing 115 is shown. The second housing 115 may be substantially symmetrical to the first housing 111 so as to be relatively engaged with the first housing 111 to form a complete housing 110 . Therefore, detailed description of the second housing 115 is omitted.

The specific structure of the moving part 120 is described with reference to FIGS. 5A and 5B.

The moving member 120 is generally rod-shaped and extends longitudinally, and includes a first end 121 , a second end 122 , a cam groove 123 , a switch engaging portion 124 , and a side wall 125 .

The first end 121 and the second end 122 are longitudinally opposite. When the moving part 120 is in the locking position, the first end 121 can extend out of the housing 110 to engage with the second object 300, while the second end 122 is located in the housing 110, and the elastic member abuts the second end 122 to push the moving part 120 is biased toward the locked position (see Figures 10 and 13).

The cam groove 123 is recessed laterally in the moving part 120 near the second end 122 . In this embodiment, the cam groove 123 is a through hole that passes through the moving component 120 laterally. However, in other embodiments, the cam groove 123 can also be a blind hole facing the cam component 140 .

In this embodiment, the cam groove 123 includes an arc-shaped front wall 123a away from the second end 122 and a linear rear wall 123b close to the second end 122 . The first cam portion 141 of the cam component 140 (see FIGS. 7A and 7B ) can rotate to the position of the rear wall 123b according to the driving of the motor component 130 and abut against the rear wall 123b to drive the moving component 120 to the unlocking position, or it can leave. rear wall 123b to allow the moving part 120 to move to the locking position.

The switch engagement portion 124 is provided near the longitudinal center of the moving member 120 and is provided as a transverse recess on the side wall 125 of the moving member 120 . The switch engagement portion 124 is used to press or release the second reed 133b of the second switch 133, which will be described in detail below.

The specific structure of the motor component 130 is described with reference to FIGS. 6A and 6B. The motor component 130 includes a motor 131, a first switch 132, a second switch 133, and a wire harness 134.

The motor 131 is generally disposed in a transverse direction and has a transversely extending drive shaft 131a. A drive shaft 131a is provided at one lateral end of the motor 131 (ie, the end facing the moving part 120), and a wire harness 134 is provided at the other lateral end (ie, the end away from the moving part 120). Drive shaft 131a extends from one end of motor 131 and may have a shaft key for rotational fixation to cam member 140. The wire bundle 134 extends to the outside of the latch device 100 and is connected, for example, to an external power source 400 and a control device (not shown) that cooperate with the latch device 100 to provide power, receive control signals, send locking signals, etc. The energy supply device and the control device can adopt technologies known in the art, and can be configured according to actual applications, and are not limited in this application.

The first switch 132 and the second switch 133 are located at the transverse end of the motor component 130 where the drive shaft 131a is provided, and are respectively located on both longitudinal sides of the drive shaft 131a, that is, respectively located on the cam component 140 connected to the drive shaft 131a. of both longitudinal sides. The first switch 132 and the second switch 133 are respectively electrically connected to the motor 131 or the wire bundle 134 through several wires in order to control the motor 131 or transmit signals.

The circuit connection method of the first switch 132 will be described with reference to FIGS. 18 and 19 . The first switch 132 is configured to connect different circuits according to the rotation of the cam member 140 . That is to say, when the moving part 120 is in the locking position shown in FIG. 9 , the cam part 140 causes the first switch 132 to connect the first circuit (for ease of understanding, it may also be called the unlocking circuit 160 ), for example, the cam part 140 The second cam portion 142 moves away from the first switch 132 so that it turns on the unlock circuit 160 . When the moving part 120 is in the unlocking position shown in FIG. 12 , the cam part 140 causes the first switch 132 to connect the second circuit (for ease of understanding, it may also be called the locking circuit 170 ), for example, the second cam part 142 abuts against the second circuit 170 . A switch 132 so that it turns on the lock circuit 170. When the unlocking circuit 160 or the locking circuit 170 is turned on, the motor 131 can rotate to drive the moving part 120 .

Therefore, according to the latch device 100 of the present application, when the moving part 120 is in the locking position, the first switch 132 turns on the unlocking circuit 160, and when the moving part 120 is in the locking position, the first switch 132 turns on the locking circuit 170. In this way, by selectively powering the unlocking circuit 160 and/or the locking circuit 170 with the external power supply 400, the unlocking and locking of the moving part 120 can be controlled. More on this below.

A specific structure of the first switch 132 is given below, and it should be understood that the present application is not limited to this structure.

In one embodiment, the first switch 132 is generally rectangular and includes a first contact 132a (see FIG. 9) and a first reed 132b. The first contact 132a is disposed on the side of the first switch 132 facing the moving part 120, and the first reed 132b is disposed between the first contact 132a and the drive shaft 131a, that is, between the first contact 132a and the cam. between the components 140, and the first spring 132b extends generally transversely. When the second cam portion 142 of the cam member 140 abuts the first reed 132b, the first reed 132b contacts the first contact 132a, so that the first switch 132 turns on the locking circuit. When the second cam portion 142 of the cam member 140 leaves the first reed 132, the first reed 132b leaves the first contact 132a and contacts another contact (not shown), so that the first switch 132 turns on the unlocking circuit. .

In this embodiment, the first reed 132b is configured with one end connected to the body of the first switch 132 and the other end being a free end. However, in other embodiments, the first reed 132b can also be configured in other appropriate forms, such as an arc-shaped form with both ends connected to the body of the first switch 132, as long as it can contact the first reed when pressed. Just contact 132a.

The second switch 133 is configured to signal a locking state based on when the moving part 120 is in the locking position. A setting method of the second switch 133 is given below, and it should be understood that the second switch 133 is not limited thereto.

In one embodiment, the second switch 133 is substantially rectangular and includes a second contact 133a and a second reed 133b. The second contact 133a is provided on the side of the second switch 133 facing the moving part 120. The second spring 133b is provided between the second contact 133a and the moving part 120 (see FIGS. 8B and 11B ), and extends substantially longitudinally.

The second reed 133b may be arranged similarly to the first reed 132b.

The specific structure of the cam member 140 will be described with reference to FIGS. 7A and 7B.

The cam member 140 rotates around a transverse rotation axis and includes a first cam portion 141 and a second cam portion 142 . The first cam portion 141 and the second cam portion 142 are provided on laterally opposite sides of the cam member 140 . More specifically, the first cam portion 141 is provided on a side of the cam component 140 away from the motor component 130 . The second cam portion 142 is provided on a side of the cam component 140 close to the motor component 130 . The first cam part 141 and the second cam part 142 are both laterally extending protrusions, and the first cam part 141 and the second cam part 142 are offset by an angle along the rotation direction of the cam component 140 . In this way, when the first cam part 141 drives the moving part 120 to move to the unlocking position, the second cam part 142 just abuts the first reed 132b of the first switch 132, so that the first switch 132 switches the circuit. It should be understood that according to the form of the first switch 132, the second cam portion 142 can also be provided in a corresponding appropriate form, as long as the first switch 132 can switch the circuit.

In this application, the latch device 100 can be selectively controlled according to one of two control modes.

The first control mode of the latch device 100 is described with reference to FIGS. 8A to 13 and 18 .

The first control method is a two-point control method, that is, an unlock-lock control method. In this control mode, the motor 131 drives the moving part 120 from the locking position to the unlocking position according to the power supply from the external power supply 400 , and drives the moving part 120 from the unlocking position to the locking position according to another power supply from the external power supply 400 . The external power supply 400 is configured to selectively power one of the unlock circuit 160 or the lock circuit 170 .

The housing 110 of the latching device 100 is mounted in the first object 200 . When the moving part 120 of the latch device 100 is in the locked position shown in FIGS. 8A to 10 , the first end 121 of the moving part 120 extends from the first object 200 through the housing 110 so as to be inserted into the second object 300 into the slot 310 (Fig. 10), thereby locking the first object 200 to the second object 300.

At this time, the switch engagement portion 124 of the moving part 120 corresponds to the position of the second reed 133b of the second switch 133, so that the second switch 133 emits a locked state signal.

When the user needs to unlock the latch device 100, he or she controls the external power supply 400 to supply power to the unlocking circuit 160. Since the moving part 120 is in the locking position, the cam part 140 causes the first switch 132 to turn on the unlocking circuit 160, so the motor 131 drives the cam part 140. As the cam member 140 rotates, the first cam portion 141 causes the moving member 120 to move to the unlocking position. At this time, the state of the latch device 100 is as shown in FIGS. 11A to 13 .

When the moving part 120 is in the unlocking position, the second cam portion 142 causes the first switch 132 to no longer turn on the unlocking circuit 160 but to turn on the locking circuit 170 . Since the locking circuit 170 is not powered at this time, the motor 131 stops driving the cam component 140, and the cam component 140 no longer drives the moving component 120, so that the moving component 120 stops in the unlocking position.

In the unlocking position, the moving part 120 is retracted into the housing 110, and the first end 121 of the moving part 120 is no longer inserted into the slot 310 of the second object 300 (Fig. 13), thereby removing the first object 200 from the second object 300. Two items are unlocked for 300.

At this time, the side wall of the moving part 120 abuts the reed 133b of the second switch 133, so that the second switch does not send out a locking state signal.

On the contrary, when the moving part 120 of the latch device 100 is in the unlocking position shown in FIGS. 11A to 13 and the user needs to lock the latch device 100, it controls the external power supply 400 to supply power to the locking circuit 170. Since the moving part 120 is in the unlocked position, the cam part 140 causes the first switch 132 to turn on the locking circuit 170, so the motor 131 drives the cam part 140. As the cam part 140 rotates, the first cam part 141 releases the moving part 120 so that the moving part 120 moves to the locking position shown in FIGS. 8A to 10 under the action of the elastic part 150 .

When the moving part 120 is in the locking position, the second cam portion 142 causes the first switch 132 to no longer turn on the locking circuit 170 but to turn on the unlocking circuit 160 . Since the unlocking circuit 160 is not powered at this time, the motor 131 stops driving the cam component 140, and the cam component 140 no longer drives the moving component 120, so that the moving component 120 stops in the locking position. As the moving part 120 returns to the locking position, the second switch 133 signals the locking state again.

The second control mode according to the present application is described with reference to FIGS. 8A to 13 and 19 . The second control method is a single-point control method, that is, an automatic locking control method. In this control mode, the motor 131 drives the moving part 120 to the unlocking position according to the power supply from the external power supply 400, and then automatically drives the moving part 120 to the locking position. Different from the first control method, the external power supply 400 always supplies power to the locking circuit 170 and selectively supplies power to the unlocking circuit 160 . In the second control mode, the operation of the second switch 133 is the same as that in the first control mode, and therefore will not be described again.

When the moving part 120 of the latch device 100 is in the locking position shown in FIGS. 8A to 10 and the user needs to unlock the latch device 100 , it controls the external power supply 400 to supply power to the unlock circuit 160 for a period of time (for example, less than the rotation of the cam part 140 one week required). Since the moving part 120 is in the locking position, the cam part 140 causes the first switch 132 to turn on the unlocking circuit 160, so the motor 131 drives the cam part 140. As the cam member 140 rotates, the first cam portion 141 causes the moving member 120 to move to the unlocking position shown in FIGS. 11A to 12 .

When the moving part 120 is in the unlocking position, the second cam portion 142 causes the first switch 132 to no longer turn on the unlocking circuit 160 but to turn on the locking circuit 170 . Since the locking circuit 170 is always powered, the motor 131 continues to drive the cam part 140, so the first cam part 141 releases the moving part 120, so that the moving part 120 moves to the locking position shown in FIGS. 8A to 10 under the action of the elastic part 150. Location.

When the moving part 120 returns to the locking position, the first switch 132 no longer turns on the locking circuit 170 but turns on the unlocking circuit 160. Moreover, since the external power supply 400 has stopped supplying power to the unlocking circuit 160, the motor 131 stops driving the cam component 140, and the cam component 140 also stops driving the moving component 120, so that the moving component 120 stops in the locking position.

In addition, it should be understood that this application describes that the second switch 133 sends a locking state signal when it is turned off (that is, when the second reed 133a is separated from the second contact 133b). However, the second switch 133 can also be set to be turned on (that is, when the second reed 133a is separated from the second contact 133b). That is, when the second reed 133a contacts the second contact 133b), a locking state signal is sent.

The latch system 1 according to the present application is described with reference to Figures 14 to 17B.

The latching system 1 includes a second object 300 and at least one first object 200 . The first object 200 can move to engage or disengage the second object 300 . In this embodiment, each first object 200 is rotatably connected to an object (not shown) such as a box through a respective hinge part 210, so the first object 200 can rotate around the hinge part 210 of the grid, thereby engaging or Detach from the second object 300. In other embodiments, the first object 200 can be installed and moved through other suitable forms such as slide rails, which is not limited in this application.

In this embodiment, two first objects 200 are provided, for example, two doors of a car refrigerator respectively. The second object 300 is, for example, a part of the frame of the vehicle refrigerator. The two first objects 200 are symmetrically arranged and joined to both sides of the second object 300 respectively. In other embodiments, the numbers of the first object 200 and the second object 300 can be changed.

Each first object 200 is provided with a latch device 100, and the first end 121 of the moving part 120 of each latch device 100 can extend from the corresponding first object 200, as shown in Figures 16B and 17B , in order to lock the first object 200 to the second object 300 as described above.

To sum up, this application proposes an automatically controlled latch device, in which a first switch is provided to control the movement of the moving part between the locking position and the unlocking position. The latch device of the present application can switch between two control modes according to the power supply from the external power supply. Moreover, the latch device of the present application can provide a locking status indication to facilitate the user to understand the locking status of the latch device. The latch device of the present application also has a structure that is as simple and modular as possible.

While preferred embodiments have been shown and described herein, it is to be understood that these embodiments are given by way of example only. Many modifications, changes and substitutions will occur to those skilled in the art without departing from the spirit of the invention. It is therefore intended that the appended claims cover all such modifications as fall within the spirit and scope of the invention.

Claims (13)

1. A latch device for locking a first object (200) to a second object (300) or releasing it from the second object (300), characterized in that the latch device includes: Shell(110); The moving part (120) is at least partially disposed in the housing (110) and can move longitudinally relative to the housing (110) between a locked position and an unlocked position. When the moving part (120) ) is at least partially located outside the housing (110) when in the locked position; a cam member (140) connected to the moving member (120) and capable of rotating to drive the moving member (120) to move; and Motor components (130), including: A motor (131), connected to the cam component (140) and driving the cam component (140) to rotate; A first switch (132) is electrically connected to the motor (131). When the moving part (120) is in the locking position, the first switch (132) is triggered by the cam part (140). The unlocking circuit (160) is turned on. When the moving component (120) is in the unlocking position, the first switch (132) is triggered by the cam component (140) to turn on the locking circuit (170), so Both the unlocking circuit (160) and the locking circuit (170) can be selectively powered to drive the motor (131). 2. The latch device according to claim 1, characterized in that: The unlocking circuit (160) can be energized so that the moving member (120) moves from the locked position to the unlocked position; The locking circuit (170) can be energized such that the moving member (120) moves from the unlocked position to the locked position. 3. The latch device according to claim 1, characterized in that: The locking circuit (170) is always powered; The unlocking circuit (160) can be energized for a period of time such that the moving member (120) moves from the locked position to the unlocked position and then from the unlocked position back to the locked position. 4. Latching device according to claim 1, characterized in that the cam member (140) rotates about a transverse drive axis and includes: A first cam portion (141) is provided on the side of the cam component (140) away from the motor component (130) and can drive the moving component (120); and The second cam part (142) is provided on the side of the cam component (140) close to the motor component (130) and can contact the first switch (132). 5. The latch device according to claim 4, characterized in that: The first cam part (141) and the second cam part (142) are transversely extending protrusions, and the first cam part (141) and the second cam part (142) extend along the The rotation direction of the cam member (140) is offset by an angle. 6. The latching device of claim 5, wherein the first switch (132) includes: A first contact (132a) is provided on the side of the first switch (132) facing the moving part (120); and A first spring (132b) is provided between the first contact (132a) and the second cam portion (142), and extends generally transversely; The first reed (132b) contacts the first contact (132a) when being pressed by the second cam part (142), so that the first switch (132) turns on the locking circuit (170 ), contacts another contact point when it is not pressed by the second cam part (142), so that the first switch (132) turns on the unlocking circuit (160). 7. The latching device of claim 1, wherein the moving part (120) includes: A first end (121), when the moving component (120) is in the locking position, the first end (121) can extend out of the housing (110); A second end (122), longitudinally opposite the first end (121), is located in the housing (110); and A cam groove (123), near the second end (122), is laterally recessed in the moving part (120), and the cam part (140) is inserted into the cam groove (123) and can The moving part (120) is driven against the inner wall of the cam groove (123). 8. The latching device according to claim 7, characterized in that: The cam groove (123) penetrates the moving part (120) laterally and includes an arcuate front wall (123a) away from the second end (122) and an arcuate front wall (123a) close to the second end (122). A rectilinear rear wall (123b). 9. The latch device of claim 1, characterized in that: The latching device further includes a second switch (133) that is triggered by the moving part (120) to send a locked state when the moving part (120) is in the locking position. Signal. 10. The latching device according to claim 9, characterized in that the moving part (120) comprises: The switch engagement part (124) is provided near the longitudinal center of the moving part (120) and is provided as a transverse recess on the side wall (125) of the moving part (120). When the moving part (120) ) is in the locking position, the side wall (125) of the moving part (120) corresponds to the second switch (133) and is in contact with the second switch (133). When the moving part (120) 120) When located in the unlocking position, the switch engaging portion (124) corresponds to the second switch (133) and avoids the second switch (133). 11. The latching device according to claim 10, characterized in that: The second switch (133) includes: A second contact (133a) is provided on the side of the second switch (133) facing the moving part (120); and A second spring (133b) is disposed between the second contact (133a) and the moving part (120) and extends substantially longitudinally. When the second spring (133b) is not pressed, The second contact point (133a) is disengaged, so that the second switch (133) sends out the locking state signal and contacts the second contact point (133a) when being pressed by the side wall (125) of the moving part (120). Two contacts (133a), so that the second switch (133) does not send out the locking state signal. 12. The latch device according to claim 1, wherein the latch device further comprises: An elastic component (150) is provided in the housing (110) and biases the moving component (120) toward the locking position. 13. A latch system, characterized in that the latch system includes: At least one first object (200); a second object (300), the first object (200) being movable to engage or disengage the second object (300); and A latching device according to any one of claims 1-12, provided on each said first article (200).