Safety switch circuit and terminal equipment

Abstract

The utility model provides a safety switch circuit and a terminal device, the safety switch circuit comprises a controller and a plurality of switch assemblies, each switch assembly is provided with a first connection terminal, and the first connection terminal is electrically connected with one pin of the controller; each switch assembly is further provided with a second connecting terminal and a third connecting terminal, the second connecting terminal is connected to one controlled device, the third connecting terminal is connected to an equivalent load, and the impedance value of the equivalent load is equal to the impedance value of the controlled device connected with the second connecting terminal of the switch assembly; the switch assembly is further provided with a movable switch piece, the fixed end of the movable switch piece is electrically connected with the first connecting terminal, and the movable end of the movable switch piece is selectively connected to the second connecting terminal or the third connecting terminal. The terminal equipment is provided with the safety switch circuit. The safety switch circuit is provided with the equivalent load, and the controller can be connected to the equivalent load when being disconnected from the controlled device.

Description

Technical Field

[0001] This utility model relates to the technical field of terminal equipment, specifically to a safety switch circuit and a terminal equipment using this safety switch circuit. Background Technology

[0002] Most existing terminal devices are equipped with microphones, cameras, and communication antennas. Since microphones and cameras can capture people's voices and images, there are security risks related to privacy leaks, while communication antennas can transmit personal privacy data. To protect personal privacy, some existing terminal devices allow users to manually turn off the microphone, camera, or communication antenna. For example, utility model patent CN222214026U discloses a terminal device with a safety switch circuit. This device can disconnect the microphone, camera, and communication antenna, thereby preventing the leakage of personal information in scenarios requiring confidentiality.

[0003] However, when controlled devices such as microphones, cameras, and communication antennas are disconnected, the controller is directly disconnected from the electrical connection of the microphones, cameras, and communication antennas. In other words, the controller's connection terminals are in a floating state instead of receiving a certain voltage, which can easily lead to damage to the controller. Utility Model Content

[0004] The primary objective of this invention is to provide a safety switch circuit that prevents damage to the controller.

[0005] The second objective of this invention is to provide a terminal device having the aforementioned safety switch circuit.

[0006] To achieve the first objective of this utility model, the safety switch circuit provided by this utility model includes a controller and multiple switch components. Each switch component has a first connection terminal, which is electrically connected to a pin of the controller. Each switch component also has a second connection terminal and a third connection terminal. The second connection terminal is connected to a controlled device, and the third connection terminal is connected to an equivalent load. The impedance value of the equivalent load is equal to the impedance value of the controlled device connected to the second connection terminal of the switch component. The switch component is also provided with a movable switch element. The fixed end of the movable switch element is electrically connected to the first connection terminal, and the movable end of the movable switch element is selectively connected to the second connection terminal or the third connection terminal.

[0007] As can be seen from the above scheme, each switching component has a third connection terminal, which is connected to an equivalent load. Therefore, when the movable end of the movable switch is disconnected from the controlled device, the movable end will connect to the third connection terminal, that is, to the equivalent load. In this way, the controller pin is not in a floating state, but is connected to a resistor. While the controller pin still has a voltage output, the current will flow through the equivalent load, preventing the controller pin from being in a floating state for a long time and effectively avoiding the problem of controller damage.

[0008] A preferred embodiment is that multiple switching components are divided into two or more groups, with each group of switching components corresponding to one type of controlled device. Preferably, the multiple types of controlled devices include at least two of the following: camera, speaker, microphone, and communication antenna.

[0009] Therefore, it can be seen that classifying and managing various types of controlled devices through multiple sets of switching components can make the on / off control of various types of controlled devices more flexible.

[0010] A preferred embodiment is that the first end of the equivalent load is connected to the third connection terminal, and the second end of the equivalent load is grounded.

[0011] Therefore, it can be seen that the circuit connection of the equivalent load is very simple, which can reduce the production cost of the safety switch circuit.

[0012] A further option is to use a single-pole double-throw switch as the movable switching element.

[0013] An alternative solution is that the movable switch includes a rotating shaft, and a first conductive coating area, a second conductive coating area and a third conductive coating area are provided on the outer surface of the rotating shaft. The first conductive coating area can abut against the first connecting terminal, the second conductive coating area can abut against the second connecting terminal, and the third conductive coating area can abut against the third connecting terminal. The first conductive coating area is connected to the second conductive coating area, and the third conductive coating area is connected to the third conductive coating area.

[0014] Therefore, by rotating the rotating shaft to different positions, the first connecting terminal can be connected to the second connecting terminal, or the first connecting terminal can be connected to the third connecting terminal, making the switching operation of the switch assembly very simple. This design justifies reducing the size of the safety switch circuit.

[0015] A further approach is to arrange the second conductive coating region, the first conductive coating region, and the third conductive coating region sequentially along the axial direction of the rotation axis.

[0016] Since the second conductive coating region and the third conductive coating region are located on both sides of the first conductive coating region, it is beneficial to the electrical connection between the first conductive coating region and the second conductive coating region and the third conductive coating region.

[0017] A further embodiment is that the central angle of the second conductive coating region corresponding to the axis of rotation is less than 180°; and the central angle of the third conductive coating region corresponding to the axis of rotation is less than 180°.

[0018] Therefore, it can be seen that the second conductive coating area and the third conductive coating area do not exceed a semicircle in the circumferential direction of the rotating shaft, which can prevent the first connecting terminal from being electrically connected to the second connecting terminal and the third connecting terminal at the same time.

[0019] A further improvement is that the first, second, and third connecting terminals are all metal spring contacts.

[0020] To achieve the second objective of this utility model, the terminal device provided by this utility model includes a housing, a display screen is provided on the housing, and multiple controlled devices are also provided; a safety switch circuit as described above is also provided, and the safety switch circuit is electrically connected to the multiple controlled devices. Attached Figure Description

[0021] Figure 1 This is the electrical schematic diagram of the first embodiment of the safety switch circuit of this utility model.

[0022] Figure 2 This is a structural diagram of the second embodiment of the safety switch circuit of this utility model.

[0023] Figure 3 This is an exploded view of the second embodiment of the safety switch circuit of this utility model.

[0024] Figure 4 This is a structural diagram of the second embodiment of the safety switch circuit of this utility model, which hides the rotating shaft.

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0026] The terminal device of this utility model can be a smartphone, tablet computer, etc. The terminal device has a housing, a display screen on the housing, and multiple controllable devices, including a microphone, speaker, camera, communication antenna, etc. The camera may include a front-facing camera and a rear-facing camera. In addition, the terminal device also includes a safety switch circuit.

[0027] First embodiment:

[0028] See Figure 1The safety switch circuit of this embodiment includes a controller and multiple switch components. Each switch component has three connection terminals: a first connection terminal, a second connection terminal, and a third connection terminal. For example, the first switch component has a movable switch element 21. The fixed end of the movable switch element 21 is connected to the first connection terminal 22, and the movable end of the movable switch element 21 can be connected to either the second connection terminal 23 or the third connection terminal 24. In this embodiment, the movable switch element 21 is a single-pole double-throw switch, and the movable end moves between the second connection terminal 23 and the third connection terminal 24 under the action of an external force.

[0029] The first connection terminal 22 is connected to a pin of the controller, and the second connection terminal 23 is connected to a controlled device 11, which in this embodiment is a camera. The third connection terminal 24 is connected to an equivalent load, which in this embodiment is an equivalent resistance 26. Figure 1 As can be seen, the first end of the equivalent resistor 26 is connected to the third connection terminal 26, and the second end of the equivalent resistor 26 is grounded. Furthermore, the impedance value of the equivalent resistor 26 is equal to the impedance value of the controlled device 11.

[0030] Similar to the first switch assembly, the second switch assembly has a movable switch element 31, which is also a single-pole double-throw switch. The fixed end of the movable switch element 31 is connected to the first connection terminal, and the movable end of the movable switch element 31 can be selectively connected to the second or third connection terminal. Furthermore, the first connection terminal is connected to a pin of the controller, the second connection terminal is connected to a controlled device 12 (in this embodiment, the controlled device 12 is a microphone), and the third connection terminal is connected to the equivalent resistance 36. Figure 1 As can be seen, the first end of the equivalent resistor 36 is connected to the third connection terminal, and the second end of the equivalent resistor 36 is grounded. Furthermore, the impedance value of the equivalent resistor 36 is equal to the impedance value of the controlled device 12.

[0031] The third switching assembly has a movable switch element 41, which is also a single-pole double-throw switch. The fixed end of the movable switch element 41 is connected to the first connection terminal, and the movable end of the movable switch element 41 can be selectively connected to the second or third connection terminal. Furthermore, the first connection terminal is connected to a pin of the controller, the second connection terminal is connected to a controlled device 13 (in this embodiment, the controlled device 13 is a speaker), and the third connection terminal is connected to the equivalent resistance 46. Figure 1 As can be seen, the first end of the equivalent resistor 46 is connected to the third connection terminal, and the second end of the equivalent resistor 46 is grounded. Furthermore, the impedance value of the equivalent resistor 46 is equal to the impedance value of the controlled device 13.

[0032] The fourth switching assembly has a movable switch element 51, which is also a single-pole double-throw switch. The fixed end of the movable switch element 51 is connected to the first connection terminal, and the movable end of the movable switch element 51 can be selectively connected to the second or third connection terminal. Furthermore, the first connection terminal is connected to a pin of the controller, the second connection terminal is connected to a controlled device 14 (in this embodiment, the controlled device 14 is a communication antenna), and the third connection terminal is connected to the equivalent load. Since the controlled device 14 is an antenna, the equivalent load of the fourth switching assembly is the equivalent load 56. Figure 1 As can be seen, the first end of the equivalent load 56 is connected to the third connection terminal, and the second end of the equivalent load 56 is grounded. Furthermore, the impedance value of the equivalent load 56 is equal to the impedance value of the controlled device 14.

[0033] Furthermore, in this embodiment, the second terminals of the multiple equivalent resistors 26, 36, 46 and the equivalent load 56 are all connected together, that is, connected to the same ground potential. This ensures that when the controller is disconnected from each of the controlled devices 11, 12, 13, 14, it can receive the same voltage as when it is connected to the controlled devices, thus preventing damage to the controller.

[0034] certainly, Figure 1 This example only demonstrates four switch components. In practical applications, the number of controlled devices of various types is often more than one. For instance, if a terminal device has three cameras, three switch components are needed to connect to each camera. Therefore, multiple switch components can be grouped, for example, according to the type of controlled device. The first group of switch components could include multiple switch components, all connected to the same type of controlled device, such as a camera. Similarly, when a terminal device has multiple communication antennas, multiple switch components are needed to connect to each antenna. Therefore, a group of switch components can be set up, with each component connected to a communication antenna. Of course, different switch components can be connected to different communication antennas, such as 5G antennas or Bluetooth antennas.

[0035] Second embodiment:

[0036] The safety switch circuit in this embodiment includes a controller and multiple switch components, wherein the structure of one switch component is as follows: Figures 2 to 4 As shown. The switch assembly has a housing 110, within which are disposed a plurality of connection terminals, including a first connection terminal 111, a second connection terminal 112, and a third connection terminal 113. Furthermore, the first connection terminal 111, the second connection terminal 112, and the third connection terminal 113 are all made of conductive material, such as metal springs. Figure 4As can be seen, the first connecting terminal 111 is located between the second connecting terminal 112 and the third connecting terminal 113. One end of the first connecting terminal 111 extends to the outside of the first side of the housing 110, and one end of the second connecting terminal 112 and the third connecting terminal 113 extends to the outside of the second side of the housing 110. This makes it convenient to solder wires to the parts of each connecting terminal that extend to the housing 110.

[0037] The switch assembly also includes a rotating shaft 120 with a rotating head 121 located outside the housing 110 for easy gripping by the user to rotate the shaft 120. Most of the rotating shaft 120 is located inside the housing 110, and the portion of the rotating shaft 120 within the housing 110 has three conductive coating regions: a first conductive coating region 131, a second conductive coating region 132, and a third conductive coating region 133. Figure 3 As can be seen, along the axial direction of the rotation axis 120, the first conductive coating region 131 is located between the second conductive coating region 132 and the third conductive coating region 133. Therefore, the first conductive coating region 131 corresponds to the first connecting terminal 111 and can abut against the first connecting terminal 111 to achieve an electrical connection with the first connecting terminal 111; the second conductive coating region 132 corresponds to the second connecting terminal 112 and can abut against the second connecting terminal 112 to achieve an electrical connection with the second connecting terminal 112; the third conductive coating region 133 corresponds to the third connecting terminal 113 and can abut against the third connecting terminal 113 to achieve an electrical connection with the third connecting terminal 113.

[0038] Furthermore, the first conductive coating region 131 is connected to the second conductive coating region 132, meaning that the first conductive coating region 131 and the second conductive coating region 132 can conduct current. Also, the first conductive coating region 131 is connected to the third conductive coating region 133, meaning that the first conductive coating region 131 and the third conductive coating region 133 can conduct current.

[0039] Since the first connecting terminal 111 cannot be simultaneously connected to both the second connecting terminal 112 and the third connecting terminal 113, the central angle of the second conductive coating region 132 relative to the axis of the rotating shaft 120 needs to be less than 180°, and the central angle of the third conductive coating region 133 relative to the axis of the rotating shaft 120 also needs to be less than 180°. Preferably, the first conductive coating region 131 can completely cover the rotating shaft 120 circumferentially, thereby ensuring that the first conductive coating region 131 can be electrically connected to the first connecting terminal 111 regardless of the angle to which the rotating shaft 120 rotates.

[0040] The safety switch circuit provided by this utility model is equipped with an equivalent load. When the controller is not connected to the controlled device, the controller pins can be connected to the equivalent load, avoiding the problem of the controller pins being in a floating state, thereby preventing damage to the controller.

[0041] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1.A safety switch circuit, comprising: a controller and a plurality of switch components, each of the switch components having a first connection terminal electrically connected to a pin of the controller; characterized in that: each of the switch components further has a second connection terminal and a third connection terminal, the second connection terminal being connected to a controlled device, and the third connection terminal being connected to an equivalent load having an impedance value equal to that of the controlled device connected to the second connection terminal; the switch component further has a movable switch element, a fixed end of the movable switch element being electrically connected to the first connection terminal, and a movable end of the movable switch element being selectively connected to the second connection terminal or the third connection terminal. 2.The safety switch circuit according to claim 1, characterized in that: the plurality of switch components are divided into two or more groups, and the switch components in the same group correspond to a type of controlled device. 3.The safety switch circuit according to claim 2, characterized in that: the plurality of types of controlled device include at least two of the following: a camera, a speaker, a microphone, and a communication antenna. 4.The safety switch circuit according to any one of claims 1 to 3, characterized in that: a first end of the equivalent load is connected to the third connection terminal, and a second end of the equivalent load is grounded. 5.The safety switch circuit according to any one of claims 1 to 3, characterized in that: the movable switch element is a single-pole double-throw switch. 6.The safety switch circuit according to any one of claims 1 to 3, characterized in that: the movable switch element includes a rotating shaft, an outer surface of the rotating shaft being provided with a first conductive coating region, a second conductive coating region, and a third conductive coating region, the first conductive coating region being capable of abutting against the first connection terminal, the second conductive coating region being capable of abutting against the second connection terminal, the third conductive coating region being capable of abutting against the third connection terminal, and the first conductive coating region being in communication with the second conductive coating region, and the first conductive coating region being in communication with the third conductive coating region. 7.The safety switch circuit according to claim 6, characterized in that: the second conductive coating region, the first conductive coating region, and the third conductive coating region are arranged in sequence along an axial direction of the rotating shaft. 8.The safety switch circuit according to claim 6, characterized in that: a central angle of the second conductive coating region corresponding to an axis of the rotating shaft is less than 180°; a central angle of the third conductive coating region corresponding to the axis of the rotating shaft is less than 180°. 9.The safety switch circuit according to claim 8, characterized in that: the first connection terminal, the second connection terminal, and the third connection terminal are all metal springs. 10.A terminal device, comprising a housing provided with a display screen, and a plurality of controlled devices. characterized in that The terminal device is provided with the safety switch circuit as claimed in any one of claims 1 to 9, and the safety switch circuit is electrically connected with the plurality of controlled devices.

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