Integrated magnetic axis key structure

Abstract

The utility model relates to the technical field of switches, and discloses an integrated magnetic shaft key structure, which comprises a base, a shell, a shaft core and a PCB (Printed Circuit Board), the base is connected with the PCB, a positioning hole is formed in the base, the shell and the base are connected to form a containing cavity, the shaft core penetrates through the shell to be arranged in the containing cavity, a reset elastic piece used for abutting against the shaft core to enable the shaft core to be partially clamped in the shell is arranged in the containing cavity, a magnetic piece is arranged on the shaft core, and a magnetic sensing unit is connected to the PCB. And the magnetic sensing unit penetrates through the positioning hole and is clamped in the accommodating cavity, so that the magnetic sensing unit is also arranged in the base through the positioning effect of the positioning hole on the magnetic sensing unit, and displacement fluctuation caused by separate assembly of the magnetic sensing unit and the magnetic piece during induction is reduced. In other words, the magnetic sensing unit is limited by the positioning hole, so that the position of the magnetic sensing unit is fixed, displacement fluctuation generated between the magnetic part and the magnetic sensing unit is effectively reduced, and signal transmission is more accurate.

Description

Technical Field

[0001] The utility model belongs to the field of switches, and in particular relates to an integrated magnetic axis key structure. Background Art

[0002] The key structure has the advantages of high stability, long service life, high safety, etc. Since the existing key structure with mechanical axis as the main body has the phenomenon of wear and reduced sensitivity after use, a key structure with magnetic axis as the main body is developed.

[0003] In the current key structure with magnetic shaft as the main body on the market, the magnet is driven to approach or move away from the magnetic sensor by moving the shaft core to switch the signal. The magnet is installed on the shaft core, and the magnetic sensor is installed on the PCB board. In this way, when the key structure is assembled, because the magnet and the magnetic sensor are assembled separately on different structures, there will be a certain deviation in the relative position of the PCB board and the shaft core, resulting in large fluctuations in the distance and position between the magnet and the magnetic sensor. Because the requirements for the installation position of the magnet and the pressing stroke of the shaft core are relatively strict during induction, the corresponding position offset between the magnet and the magnetic sensor will cause signal transmission errors, making the signal transmission inaccurate. Utility Model Content

[0004] In order to overcome the problem that the corresponding position offset between the magnet and the magnetic sensor described in the above background technology may cause signal transmission error and make the signal transmission inaccurate, the present application provides an integrated magnetic axis button structure.

[0005] In order to solve the above technical problems, the technical solution adopted in this application is:

[0006] An integrated magnetic axis key structure comprises: a base, a shell, an axis core and a PCB board;

[0007] The base is connected to the PCB board, and a positioning hole is provided in the base. The shell and the base are connected to form an accommodating cavity. The shaft core passes through the shell and is arranged in the accommodating cavity. A reset elastic member for abutting against the shaft core so that the shaft core part is stuck in the shell is arranged in the accommodating cavity. A magnetic member is arranged on the shaft core. A magnetic sensor unit is connected to the PCB board, and the magnetic sensor unit passes through the positioning hole and is stuck in the accommodating cavity, so as to reduce the displacement fluctuation generated by the magnetic sensor unit and the magnetic member when induction occurs by positioning the magnetic sensor unit through the positioning hole.

[0008] In one embodiment, the magnetic member is configured as a magnet.

[0009] In one embodiment, the magnetic member is mounted on the shaft core;

[0010] The magnetic sensing unit comprises a pin, a circuit board and a magnetic sensor which are electrically connected in sequence, one end of the pin is mounted on the PCB, the other end of the pin passes through the positioning hole and is connected to the circuit board, the circuit board is arranged in the accommodating cavity, and the magnetic sensor is mounted on the circuit board;

[0011] Wherein, the magnetic sensor is configured as a Hall sensor.

[0012] In one embodiment, the magnetic member is mounted on the shaft core;

[0013] The magnetic sensing unit comprises a pin, a circuit board and a magnetic sensor which are electrically connected in sequence, one end of the pin is mounted on the PCB, the other end of the pin passes through the positioning hole and is connected to the circuit board, the circuit board is arranged in the accommodating cavity, and the magnetic sensor is mounted on the circuit board;

[0014] Wherein, the magnetic sensor is configured as an AMR sensor, a GMR sensor or a TMR sensor.

[0015] In one embodiment, a clamping member for positioning and clamping the circuit board is provided on the base.

[0016] In one embodiment, the shaft core is provided with a mounting groove, and the magnetic component is mounted in the mounting groove.

[0017] In one embodiment, a chamfer is formed at the bottom end of the mounting groove.

[0018] In one embodiment, a limiting ring is arranged in the base, the shaft core is slidably arranged in the limiting ring, and the reset elastic member is sleeved on the outer side of the limiting ring.

[0019] In one embodiment, convex ribs are arranged on the inner surface of the limiting ring.

[0020] In one embodiment, one end of the rib close to the shell is provided with a chamfer.

[0021] In one embodiment, a middle plate is further included, and the middle plate is clamped with the base.

[0022] Compared with the prior art, the beneficial effect is: by applying external force to the top of the shaft core, the shaft core drives the magnetic part to press down, at this time, the shaft core compresses the reset elastic part until the magnetic part and the magnetic sensor unit are induced; the external force is removed, so that the reset elastic part drives the shaft core to move up, thereby driving the magnetic part to move up and reset. Thus, signal switching is achieved. Among them, by opening a positioning hole on the base, and one end of the magnetic sensor unit is connected to the PCB board, and the other end is arranged in the accommodating cavity through the positioning hole, the magnetic sensor unit is limited by the positioning hole, so that the position of the magnetic sensor unit is fixed, and the magnetic sensor unit is also arranged in the base, reducing the displacement fluctuation caused by the separate assembly of the magnetic sensor unit and the magnetic part when induction occurs, that is, effectively reducing the displacement fluctuation generated between the magnetic part and the magnetic sensor unit, so that the signal transmission is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the integrated magnetic axis key structure of an embodiment of the present application;

[0024] Figure 2 is a schematic cross-sectional structural diagram of an integrated magnetic axis key structure of an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the exploded structure of the integrated magnetic axis key structure of an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of an exploded structure in which a magnetic sensor unit of an embodiment of the present application is installed in a base;

[0027] Figure 5 is a schematic diagram of the exploded structure of a magnetic sensor unit according to an embodiment of the present application;

[0028] Figure 6 It is a schematic diagram of the exploded structure of the embodiment of the present application in which the magnetic part is installed in the shaft core;

[0029] Figure 7 It is a schematic diagram of the exploded structure of an embodiment of the present application in which the shaft core is installed in the base.

[0030] 10. Integrated magnetic axis button structure; 100. Base; 110. Positioning hole; 120. Limiting ring; 130. Raised rib; 140. Positioning piece; 200. Shell; 300. Shaft core; 310. Mounting groove; 400. Accommodating cavity; 500. PCB board; 600. Reset elastic piece; 700. Magnetic piece; 800. Magnetic sensor unit; 810. Pin; 820. Circuit board; 830. Magnetic sensor; 900. Middle plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] like Figures 1 to 7 As shown, in this embodiment, an integrated magnetic axis key structure 10 is provided, including: a base 100, a shell 200, an axis core 300 and a PCB board 500; the base 100 is connected to the PCB board 500, and the base 100 is provided with a positioning hole 110, the shell 200 and the base 100 are connected to form a receiving cavity 400, the axis core 300 passes through the shell 200 and is arranged in the receiving cavity 400, and a reset elastic member 600 for abutting against the axis core 300 so that the axis core 300 is partially stuck in the shell 200 is arranged in the receiving cavity 400, a magnetic member 700 is arranged on the axis core 300, a magnetic sensor unit 800 is connected to the PCB board 500, and the magnetic sensor unit 800 passes through the positioning hole 110 and is stuck in the receiving cavity 400, so that the magnetic sensor unit 800 and the magnetic member 700 are positioned by the positioning hole 110 to reduce the position fluctuation of the magnetic sensor unit 800 and the magnetic member 700 when induction occurs.

[0035] Specifically, refer to Figure 1 , Figure 2 and Figure 4The base 100 and the shell 200 are buckled and connected to each other, and the base 100 and the shell 200 are buckled to form a receiving chamber 400. A jack is provided on the PCB board 500 (Printed Circuit Board), and the bottom end of the base 100 is inserted into the jack, wherein two jacks are provided. The top end of the shaft core 300 protrudes from the shell 200, and a pressing hole is provided on the top surface of the shell 200. The bottom end of the shaft core 300 passes through the pressing hole and is provided in the receiving chamber 400. The reset elastic member 600 is provided as a spring, and the bottom end of the reset elastic member 600 abuts against the side wall of the receiving chamber 400, and the top end of the reset elastic member 600 abuts against the shaft core 300, so that the top end of the shaft core 300 under normal conditions can protrude from the pressing hole. The magnetic component 700 is installed on the shaft core 300, a positioning hole 110 is opened at the bottom end of the base 100, the bottom end of the magnetic sensor unit 800 is installed on the PCB board 500, and the top end of the magnetic sensor unit 800 passes through the positioning hole 110 and is arranged in the accommodating cavity 400, so that the magnetic sensor unit 800 is arranged in the accommodating cavity 400.

[0036] It is worth noting that by applying external force to the top of the shaft core 300, the shaft core 300 drives the magnetic member 700 to press down. At this time, the shaft core 300 compresses the reset elastic member 600 until the magnetic member 700 and the magnetic sensor unit 800 are inductively sensed. When the external force is removed, the reset elastic member 600 drives the shaft core 300 to move upward, thereby driving the magnetic member 700 to move upward and reset. Thus, signal switching is achieved. Among them, by opening a positioning hole 110 on the base 100, and one end of the magnetic sensor unit 800 is connected to the PCB board 500, and the other end passes through the positioning hole 110 and is arranged in the accommodating cavity 400, so that the magnetic sensor unit 800 is limited by the positioning hole 110, so that the position of the magnetic sensor unit 800 is fixed, and the magnetic sensor unit 800 is also arranged in the base 100, reducing the displacement fluctuation caused by the separate assembly of the magnetic sensor unit 800 and the magnetic component 700 when induction occurs, that is, effectively reducing the displacement fluctuation generated between the magnetic component 700 and the magnetic sensor unit 800, ensuring that the positions and distances of the two are fixed when induction occurs, so that the signal transmission is more accurate.

[0037] In order to facilitate the use of the integrated magnetic axis key structure 10 , in one embodiment, the magnetic member 700 is configured as a magnet.

[0038] Specifically, the size, material, shape and magnetization direction of the magnetic member 700 are set according to actual production conditions. For example, the magnetic member 700 is set as a magnet. It is understandable that the magnetic member 700 can also be set as other components known to those skilled in the art that can generate magnetism and can sense with the magnetic sensor unit 800 to switch signals.

[0039] In order to facilitate the production of the integrated magnetic axis key structure 10, as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the magnetic member 700 is mounted on the shaft core 300; the magnetic sensing unit 800 includes a pin 810, a circuit board 820 and a magnetic sensor 830 which are electrically connected in sequence, one end of the pin 810 is mounted on the PCB board 500, and the other end of the pin 810 passes through the positioning hole 110 and is connected to the circuit board 820, the circuit board 820 is arranged in the accommodating cavity 400, and the magnetic sensor 830 is mounted on the circuit board 820; wherein the magnetic sensor 830 is set to be a Hall sensor, an AMR sensor, a GMR sensor or a TMR sensor.

[0040] Specifically, the magnetic member 700 is mounted on the shaft core 300, and its specific mounting position is set according to the actual production situation. The bottom end of the pin 810 is welded on the PCB board 500, and the top end of the pin 810 is connected to the circuit board 820. For example, the top end of the pin 810 is embedded and welded with the circuit board 820; for another example, the bottom end of the pin 810 is plugged and connected to the PCB board 500. The number of positioning holes 110 is set corresponding to the number of pins 810, for example, the pins 810 and the positioning holes 110 are set to 3. The shape of the positioning hole 110 is set corresponding to the shape of the pin 810, and the connection between the pin 810 and the positioning hole 110 is provided with a chamfer, and the shape of the positioning hole 110 is set in coordination with it. A magnetic sensor 830 is connected to the circuit board 820, and the magnetic sensor 830 is welded on the circuit board 820, and transmits signals with the PCB board 500 through the pin 810. After pressing the shaft core 300, the magnet and the magnetic sensor 830 are induced, and the magnetic sensor 830 transmits an electrical signal to the circuit board 820, and the circuit board 820 transmits the electrical signal to the PCB board 500 through the pin 810. In this way, the integrated magnetic shaft key structure 10 is convenient to use.

[0041] It is understandable that the magnetic sensor 830 may be selected but not limited to a Hall sensor, and may also be set to an AMR (Anisotropic Magnetoresistance) sensor, a GMR (Giant Magnetoresistance) sensor, or a TMR (Tunneling Magnetoresistance) sensor. Furthermore, the magnetic sensor 830 is only used as an example, and the magnetic sensor 830 may also be other components that can generate induction corresponding to the magnetic element 700 to switch signals, and can be connected to the PCB board 500 and the positioning hole 110.

[0042] In order to facilitate the installation of the magnetic member 700, as Figure 2 and Figure 6As shown, in one embodiment, the shaft core 300 is provided with a mounting groove 310 , and the magnetic member 700 is installed in the mounting groove 310 .

[0043] Specifically, the shape of the mounting groove 310 matches the shape of the magnetic member 700 , the magnet is interference fit in the mounting groove 310 , and the bottom end of the magnet is located in the mounting groove 310 .

[0044] In order to facilitate the installation of the magnetic member 700 in the installation groove 310, as shown in FIG. Figure 2 and Figure 6 As shown, in one embodiment, the bottom end of the mounting groove 310 is chamfered.

[0045] Specifically, by chamfering the bottom end of the mounting groove 310 , it is easy for the magnet to slide into the mounting groove 310 , thereby facilitating the assembly of the magnet.

[0046] In order to facilitate the installation of the resetting elastic member 600, as Figure 2 , Figure 3 Figure 4 and Figure 7 As shown, in one embodiment, a limit ring 120 is disposed in the base 100 , the shaft core 300 is slidably disposed in the limit ring 120 , and the reset elastic member 600 is sleeved on the outer side of the limit ring 120 .

[0047] Specifically, the limiting ring 120 is hollow, the shaft core 300 is slidably connected to the inner surface of the limiting ring 120 to limit the sliding direction of the shaft core 300, the bottom end of the reset elastic member 600 is sleeved on the outer surface of the limiting ring 120, and the top end of the reset elastic member 600 is sleeved on the bottom end of the shaft core 300. In this way, the reset elastic member 600 can be fixedly installed to prevent the reset elastic member 600 from being out of position during use, which effectively increases the practicality of the integrated magnetic axis key structure 10.

[0048] In order to facilitate the movement of the shaft core 300 to be smoother, Figure 7 As shown, in one embodiment, a rib 130 is provided on the inner surface of the limiting ring 120 .

[0049] Specifically, a convex rib 130 is added to the sliding connection between the base 100 and the shaft core 300. The sliding connection between the shaft core 300 and the convex rib 130 can effectively reduce the contact area between the shaft core 300 and the inner surface of the limiting ring 120, thereby effectively reducing friction and making the movement of the shaft core 300 smoother. The number of convex ribs 130 is set according to the actual production situation. For example, the number of convex ribs 130 is set to 2. For another example, the number of convex ribs 130 is set to 3. For another example, the number of convex ribs 130 is set to 4.

[0050] In order to facilitate the assembly of the shaft core 300, as Figure 7As shown, in one embodiment, one end of the rib 130 close to the housing 200 is provided with a chamfer.

[0051] Specifically, chamfering is performed on the top of the rib 130 to facilitate the sliding of the shaft core 300 .

[0052] In order to facilitate the fixed installation of the base 100, as Figure 2 and Figure 3 As shown, in one embodiment, the integrated magnetic axis button structure 10 further includes a middle plate 900 , and the middle plate 900 is snap-connected with the base 100 .

[0053] Specifically, by connecting the inner surface of the middle plate 900 with the outer surface of the base 100 , the base 100 can be limited and fixed by the middle plate 900 , thus effectively increasing the practicality of the integrated magnetic axis button structure 10 .

[0054] Example 2

[0055] This embodiment is similar to Embodiment 1, except that, in this embodiment, the magnetic member 700 is fixed in the mounting groove 310 by riveting.

[0056] In another embodiment, the magnetic member 700 is fixed in the mounting groove 310 by glue.

[0057] Example 3

[0058] This embodiment is a further preferred embodiment of embodiment 1. Figure 7 As shown, in this embodiment, an upper guide portion is provided on the shaft core 300, and a lower guide portion corresponding to the upper guide portion is provided on the base 100, and the upper guide portion and the lower guide portion cooperate to guide the directional telescopic movement of the shaft core 300. For example, the upper guide portion includes a hybrid guide structure of a guide rail and a guide groove, and the lower guide portion is a hybrid guide structure corresponding to and matching the upper guide portion.

[0059] In order to increase the practicality of the integrated magnetic axis button structure 10, as Figure 7 As shown, in one embodiment, the top end of the shaft core 300 is configured as a cross pressing portion.

[0060] Example 4

[0061] This embodiment is a further preferred embodiment of embodiment 1. Figure 3 and Figure 4 As shown, in this embodiment, a clamping member 140 for positioning and clamping the circuit board 820 is disposed on the base 100 .

[0062] Specifically, the locking member 140 is configured as a hook, and two hooks are configured. The shape of the hook is adapted to the shape of the circuit board 820. By providing the locking member 140, the circuit board 820 is fixed, thereby effectively avoiding the displacement of the magnetic sensor 830 due to the suspension of the circuit board 820. In this way, the positioning effect of the magnetic sensor 830 is better.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0065] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0066] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. An integrated magnetic axis key structure, characterized in that: include: A base (100), a housing (200), an axis core (300) and a PCB board (500); The base (100) is connected to the PCB board (500), and the base (100) is provided with a positioning hole (110); the shell (200) and the base (100) are connected to form a receiving cavity (400); the shaft core (300) passes through the shell (200) and is arranged in the receiving cavity (400); and a reset member for abutting against the shaft core (300) so that the shaft core (300) is partially stuck in the shell (200) is provided in the receiving cavity (400). The elastic member (600) is provided with a magnetic member (700) on the shaft core (300), a magnetic sensor unit (800) is connected to the PCB board (500), and the magnetic sensor unit (800) passes through the positioning hole (110) and is clamped in the accommodating cavity (400), so that the positioning hole (110) can be used to position the magnetic sensor unit (800), thereby reducing the displacement fluctuation generated by the magnetic sensor unit (800) and the magnetic member (700) when induction occurs.

2. The integrated magnetic axis key structure according to claim 1, characterized in that: The magnetic member (700) is configured as a magnet.

3. The integrated magnetic axis key structure according to claim 2, characterized in that: The magnetic member (700) is mounted on the shaft core (300); The magnetic sensing unit (800) comprises a pin (810), a circuit board (820) and a magnetic sensor (830) which are electrically connected in sequence, one end of the pin (810) is mounted on the PCB board (500), the other end of the pin (810) passes through the positioning hole (110) and is connected to the circuit board (820), the circuit board (820) is arranged in the accommodating cavity (400), and the magnetic sensor (830) is mounted on the circuit board (820); Wherein, the magnetic sensor (830) is configured as a Hall sensor.

4. The integrated magnetic axis key structure according to claim 2, characterized in that: The magnetic member (700) is mounted on the shaft core (300); The magnetic sensing unit (800) comprises a pin (810), a circuit board (820) and a magnetic sensor (830) which are electrically connected in sequence, one end of the pin (810) is mounted on the PCB board (500), the other end of the pin (810) passes through the positioning hole (110) and is connected to the circuit board (820), the circuit board (820) is arranged in the accommodating cavity (400), and the magnetic sensor (830) is mounted on the circuit board (820); Wherein, the magnetic sensor (830) is configured as an AMR sensor, a GMR sensor or a TMR sensor.

5. The integrated magnetic axis key structure according to claim 3, characterized in that: The base (100) is provided with a clamping member (140) for positioning and clamping the circuit board (820).

6. The integrated magnetic axis key structure according to claim 1, characterized in that: The shaft core (300) is provided with a mounting groove (310), and the magnetic component (700) is mounted in the mounting groove (310).

7. The integrated magnetic axis key structure according to claim 6, characterized in that: The bottom end of the installation groove (310) is provided with a chamfer.

8. The integrated magnetic axis key structure according to claim 1, characterized in that: A limiting ring (120) is arranged inside the base (100), the shaft core (300) is slidably arranged inside the limiting ring (120), and the resetting elastic member (600) is sleeved on the outside of the limiting ring (120).

9. The integrated magnetic axis key structure according to claim 8, characterized in that: A convex rib (130) is provided on the inner surface of the limiting ring (120).

10. The integrated magnetic axis key structure according to claim 9, characterized in that: One end of the convex rib (130) close to the housing (200) is provided with a chamfer.

11. The integrated magnetic axis key structure according to claim 1, characterized in that: It also includes a middle plate (900), and the middle plate (900) is clamped with the base (100).

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