Key conduction structure and control device

Abstract

The utility model relates to a button conduction structure and a control device, the button conduction structure comprises a soft board assembly, the soft board assembly comprises a circuit soft board, an isolation board and a conduction board which are successively superposed, the circuit board and the conduction board are respectively provided with a contact with a gap and a conduction member, and the isolation board is provided with an avoiding hole at the contact; the key board is arranged on one side of the circuit board, a plurality of keys are arranged on the key board, and the keys, the contacts and the conduction pieces are coaxially arranged; and the shell is used for accommodating the soft board assembly and the key board. Through the above arrangement, the conduction contacts and the PCB are designed into one body, the PCB is a soft board, and in order to enhance the rigidity of the soft board, the back surface of the soft board is additionally provided with a structural member for supporting, so that the pressing stroke can be effectively reduced, the wrong conduction is prevented, and the conduction sensitivity is increased. And the flexible soft plate structure design is adopted, so that rigid impact can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of keys, in particular to a key conduction structure and a control device. Background Art

[0002] Electronic devices and other terminals usually have physical function buttons for controlling functions such as power on / off, volume increase / decrease, channel increase / decrease, menu, confirmation, etc., and the selection of the above functions is achieved through the button conduction structure.

[0003] In the current case conduction structure, the conduction contacts are integrated on the silicone keypad and separated from the PCB board. To prevent misconduction, the key stroke must be designed to be relatively large, resulting in a deeper key press and insufficient sensitivity. In addition, the conduction contacts are integrated on the silicone keypad and separated from the PCB board. When pressed, the metal contacts will hit the gold-plated points on the PCB board. Long-term rigid impact actuation will damage the metal contacts on the silicone keypad and the gold-plated points on the PCB surface, thereby reducing the reliability and service life of the product. Since the conduction contacts are separated from the PCB, the PCB needs to withstand a certain impact force. The PCB needs to have strong hardness and strength, and thus cannot be designed as a soft board. This seriously restricts the diversified design of products and reduces customer satisfaction. Utility Model Content

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that because the conductive contacts and the PCB are separated structures, the PCB needs to withstand a certain impact force and the PCB needs to have strong hardness and strength, thereby providing a key conductive structure and control device.

[0005] In order to solve the above technical problems, the present invention provides a key conduction structure, comprising:

[0006] A flexible board assembly, the flexible board assembly comprising a circuit board, an isolation board, and a conductive board stacked in sequence, the circuit board and the conductive board respectively being provided with contacts and conductive members with gaps, and the isolation board being provided with avoidance holes at the contacts;

[0007] A keypad is provided on one side of the flexible circuit board, wherein the keypad is provided with a plurality of keys, and the keys, contacts and conducting members are coaxially arranged;

[0008] The shell is used to accommodate the soft board component and the key board. A support plate is arranged in the shell and is arranged on one side of the conductive plate.

[0009] In one embodiment of the present invention, the shell includes a front frame and a bracket, the front frame is arranged on one side of the key plate, the front frame is provided with multiple first through holes, multiple keys pass through the first through holes and extend outwardly, and the bracket is arranged on one side of the support plate.

[0010] In one embodiment of the present invention, the bracket, support plate and soft board assembly are pressed and fitted in sequence, and the bracket is snap-connected with the front frame.

[0011] In one embodiment of the present invention, the front frame is provided with a clamping column, the key panel, soft board and support board are respectively provided with a second through hole, the bracket is provided with a clamping hole under the second through hole, and a protrusion is provided on one side of the clamping column, and the protrusion elastically abuts against the lower side wall of the clamping hole.

[0012] In one embodiment of the present invention, first buckles are provided around the support plate, and a first slot is provided on the front frame. The first buckle is connected to the front frame through the first slot.

[0013] In one embodiment of the present invention, a second buckle is provided on the peripheral side of the bracket, and a second slot is provided on the front frame, and the second buckle is connected to the front frame through the second slot.

[0014] In one embodiment of the present invention, the conducting plate is further provided with a conductive layer, and the conducting plate is electrically connected to the support plate via the conductive layer.

[0015] In one embodiment of the present invention, the key board is provided with a positioning column, and the soft board, the support board and the bracket are respectively provided with positioning holes in sequence, and the positioning column extends through the positioning holes in sequence.

[0016] In one embodiment of the present invention, the conductive member is a continuous conductive ring, the contact is a half ring with two gaps, and the orthographic projection area of the conductive ring at least covers the gaps.

[0017] The utility model also discloses a control device, which comprises the above-mentioned key conduction structure.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] The present invention describes a key conduction structure that integrates the conduction contact with the PCB. Through the pressing action of the silicone key and the support of the remaining structural components, the key travel is reduced by stacking soft board components, enabling sensitive instantaneous conduction with minimal impact force. Signals are transmitted to the mainboard. The conduction contact is integrated with the PCB, and a soft board is used as the PCB. To enhance the rigidity of the soft board, structural support is added to the back of the soft board, effectively reducing the pressing stroke, preventing mis-conduction, and increasing its conduction sensitivity. The flexible soft board structure design effectively avoids rigid impact, improves the product's press feel, reliability, and service life, and increases customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model and in conjunction with the accompanying drawings, wherein

[0021] Figure 1 It is a three-dimensional diagram of the conductive structure of the utility model;

[0022] Figure 2 It is an exploded schematic diagram of the conductive structure of the utility model;

[0023] Figure 3 It is a cross-sectional view of the conductive structure of the utility model;

[0024] Figure 4 This is a structural diagram of the positioning column part of the utility model;

[0025] Figure 5 This is a structural diagram of the clamping column part of the utility model;

[0026] Figure 6 It is a cross-sectional view of the conductive structure portion of the utility model;

[0027] Figure 7 It is an exploded schematic diagram of the flexible board assembly of the utility model;

[0028] Figure 8 It is a structural diagram of the conducting ring and the contacts of the utility model.

[0029] Explanation of the reference numerals in the specification: 1. front frame; 11. first through hole; 12. second card slot; 13. first card slot; 14. snap-fitting column; 15. protrusion; 2. keypad; 21. key; 22. positioning column; 3. soft board assembly; 31. soft circuit board; 311. contact; 32. isolation board; 33. conductive board; 331. conductive ring; 4. support board; 41. first snap; 5. bracket; 51. second snap; 6. second through hole; 7. snap-fitting hole; 8. positioning hole. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. Example

[0031] Reference Figure 1 As shown, a key 21 conduction structure of the present invention includes:

[0032] The flexible board assembly 3 includes a circuit board 31, an isolation board 32, and a conductive board 33, which are stacked in sequence. The circuit board and the conductive board 33 are respectively provided with a contact 311 with a gap and a conductive member. The isolation board 32 has an avoidance hole at the contact 311.

[0033] A keypad 2 is provided on one side of the flexible circuit board. The keypad 2 is provided with a plurality of keys 21. The keys 21, the contacts 311 and the conductive members are coaxially arranged.

[0034] The housing is used to accommodate the soft board assembly 3 and the key board 2 . A support board 4 is provided in the housing. The support board 4 is provided on one side of the conductive board 33 .

[0035] The utility model describes a conductive structure of a key 21, in which the positions of the contact 311 and the conductive part correspond to each other to realize the conductive function. When the key 21 is pressed, the contact 311 can contact the conductive part through the avoidance hole, and the areas of the circuit soft board 31 and the conductive board 33 outside the key 21 are isolated and shielded. The circuit soft board 31, the isolation plate 32 and the conductive board 33 are connected together by bonding or other fixing methods to form an overall soft board assembly 3. A plurality of keys 21 are provided on the key plate 2. The positions of the plurality of keys 21 are coaxially arranged with the contact 311 on the circuit soft board 31 and the conductive part on the conductive board 33. The material of the key plate 2 can be silicone or other materials with a certain degree of elasticity, so that the key 21 can return to its original position after being pressed. The support plate 4 provides support for the conductive board 33 to prevent the conductive board 33 from excessive deformation when the key 21 is pressed, resulting in failure to conduct or poor conduction.

[0036] When the key 21 on the keypad 2 is pressed, the key 21 moves toward the circuit board 31. Since the key 21, the contact 311 on the circuit board 31, and the conductive member on the conductive plate 33 are coaxially arranged, the pressure of the key 21 is transmitted to the contact 311 through the circuit board 31. Under the action of pressure, the contact 311 passes through the avoidance hole on the isolation plate 32 and contacts the conductive member on the conductive plate 33, thereby cooperating to achieve conduction of the contact 311 on the circuit board 31. When the key 21 is released, the keypad 2 will return to its original position due to its own elasticity, the contact 311 will separate from the conductive member, and the circuit will be disconnected.

[0037] The shell includes a front frame 1 and a bracket 5. The front frame 1 is arranged on one side of the keypad 2. The front frame 1 is provided with a plurality of first through holes 11. The plurality of keys 21 pass through the first through holes 11 and extend protrusions 15 outwardly, so that the keys 21 can extend from the front frame 1, making it convenient for users to press the keys. At the same time, the through hole wall of the front frame 1 limits and guides the movement of the keys 21, so that the keys 21 can transmit pressure to the keypad 2 along a predetermined direction. The bracket 5 is arranged on one side of the support plate 4. The bracket 5 is arranged on one side of the support plate 4. A metal material with higher strength is selected to support the soft board. The bracket 5 is installed inside the shell by any one or more of screws, snaps or other fixing methods to provide support for the soft board and prevent it from deformation or damage when under pressure.

[0038] The bracket 5, support plate 4 and soft board assembly 3 are pressed and fitted in sequence, and the bracket 5 and the front frame 1 are snap-fitted, which is not only easy to operate but also can provide sufficient connection strength to ensure that the bracket 5 is not easily separated from the front frame 1 during use.

[0039] The front frame is provided with a clamping column 14, and the key panel 2, soft board and support plate 4 are respectively provided with a second through hole 6. The bracket 5 is provided with a clamping hole 7 under the second through hole. A protrusion 15 is provided on one side of the clamping column 14, and the protrusion 15 elastically abuts against the lower side wall of the clamping hole 7. The clamping column 14 of the front frame passes through the second through hole 6 on the key panel 2, soft board and support plate 4 in sequence, and passes through the clamping hole of the bracket 5, so that the protrusion 15 on the clamping column 14 elastically abuts against the lower side wall of the clamping hole 7, thereby realizing the connection between the front frame and the bracket 5, and maintaining a certain pre-pressure, and fixing the key panel 2, soft board and support plate 4 up and down by the clamping column 14. The clamping column 14 is supported by an elastic material to form an elastic force arm. The protrusion 15 is arc-shaped, such as a semicircle or an ellipse, and passes through the through hole so that it can be guided in its own shape.

[0040] The support plate 4 is provided with a first clip 41 around it, and the front frame is provided with a first clip 13. The first clip 41 is clipped to the front frame through the first clip 13. The support plate 4 is placed at a corresponding position between the front frame and the bracket 5, so that the first clips 41 around the support plate 4 correspond to the first clip 13 on the front frame, and the first clip 41 is pressed into the first clip 13 to achieve a clip connection.

[0041] The bracket 5 is provided with a second clip 51 on the periphery, and the front frame is provided with a second clip slot 12. The second clip 51 is clipped to the front frame through the second clip slot 12. The bracket 5 is placed on the corresponding position of the front frame so that the first clips 41 around the bracket 5 correspond to the first clip slot 13 on the front frame. The first clip 41 is pressed into the first clip slot 13 to achieve a clip connection.

[0042] The conducting plate 33 is also provided with a conductive layer, and the conducting plate 33 is electrically connected to the support plate 4 through the conductive layer. After assembly, the conductive layer on the conducting plate 33 is in direct contact with the support plate 4. Current is transferred from the conducting plate 33 to the support plate 4 through the conductive layer, achieving grounding.

[0043] The keypad 2 is provided with a positioning post 22. Positioning holes 8 are defined in the flexible board, support plate 4, and bracket 5, respectively. The positioning post 22 extends through each of these holes. The positioning post 22 and the hole 8 have an interference fit, and the diameter of the positioning post 22 is slightly larger than the diameter of the hole 8, improving the stability and reliability of the assembled structure. Alternatively, the positioning post 22 and the hole 8 can have a clearance fit, meaning the diameter of the positioning post 22 is slightly smaller than the diameter of the hole 8, allowing for insertion without applying pressure during assembly.

[0044] The conductive member is a continuous conductive ring 331. The contact 311 is a semi-ring with two gaps. The orthographic projection of the conductive ring 331 covers at least the gaps. The conductive ring 331 is a complete annular structure and can be made of metal or other conductive materials. The contact 311 consists of two semi-rings with a gap between them. The semi-rings are also made of conductive material. Example

[0045] This embodiment discloses a control device, including a button 21 conduction structure as described in Example 1.

[0046] The control device disclosed in this embodiment also includes a control circuit board, which is connected to the flexible board assembly 3 in the conductive structure of the button 21. When the user presses the button 21, the contact 311 on the circuit board 31 in the flexible board assembly 3 contacts the conductive member on the conductive board 33, completing the circuit conduction. The signal is then transmitted to the control circuit board through the flexible board assembly 3. After receiving the signal, the control circuit board performs corresponding processing according to a preset program, thereby realizing the control function of the device. The control circuit board is also equipped with a power module to power the entire device. The power module is connected to the control circuit board and the relevant components of the conductive structure of the button 21 via wires.

[0047] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A key conduction structure, characterized in that: include: A flexible board assembly, the flexible board assembly comprising a circuit board, an isolation board, and a conductive board stacked in sequence, the circuit board and the conductive board respectively being provided with contacts and conductive members with gaps, and the isolation board being provided with avoidance holes at the contacts; A keypad is provided on one side of the flexible circuit board, wherein the keypad is provided with a plurality of keys, and the keys, contacts and conducting members are coaxially arranged; The shell is used to accommodate the soft board component and the key board. A support plate is arranged in the shell and is arranged on one side of the conductive plate.

2. The key conduction structure according to claim 1, characterized in that: The shell includes a front frame and a bracket. The front frame is arranged on one side of the key board. The front frame is provided with a plurality of first through holes. The plurality of keys pass through the first through holes and extend outwardly. The bracket is arranged on one side of the support plate.

3. The key conduction structure according to claim 2, characterized in that: The bracket, support plate and soft board assembly are pressed and fitted in sequence, and the bracket is clamped with the front frame.

4. The key conduction structure according to claim 2, characterized in that: The front frame is provided with a clamping column, the key panel, soft board and support board are respectively provided with a second through hole, the bracket is provided with a clamping hole under the second through hole, and a protrusion is provided on one side of the clamping column, and the protrusion elastically abuts against the lower side wall of the clamping hole.

5. The key conduction structure according to claim 2, characterized in that: The support plate is provided with first buckles around its periphery, the front frame is provided with a first clamping slot, and the first buckle is clamped to the front frame through the first clamping slot.

6. A key conduction structure according to claim 2 or 5, characterized in that: A second buckle is provided on the peripheral side of the bracket, and a second clamping slot is provided on the front frame. The second buckle is clamped to the front frame through the second clamping slot.

7. The key conduction structure according to claim 1, characterized in that: The conducting plate is further provided with a conductive layer, and the conducting plate is electrically connected to the supporting plate through the conductive layer.

8. The key conduction structure according to claim 1, characterized in that: The key board is provided with a positioning column, and the soft board, the support board and the bracket are respectively provided with positioning holes in sequence, and the positioning column extends through the positioning holes in sequence.

9. The key conduction structure according to claim 1, characterized in that: The conductive member is a continuous conductive ring, the contact is a half ring with two gaps, and the orthographic projection area of the conductive ring at least covers the gaps.

10. A control device, characterized in that: It comprises a key conduction structure as described in any one of claims 1-9.

Images