Hall key

Abstract

The utility model discloses a Hall key, which comprises a key seat positioned on a PCB (Printed Circuit Board), a pressing handle capable of moving up and down in the key seat, a reset spring for resetting the pressing handle, a magnetic piece and a protective sleeve, a cavity for accommodating the magnetic piece is arranged at the upper part of the protective sleeve, a guide column extends downwards from the center of the bottom of the pressing handle, and the guide column is arranged in the cavity. And the guide pillar can be assembled and inserted into the cavity of the protective sleeve to package the magnetic piece in the cavity. By optimizing the assembling relation among the magnetic part, the guide pillar and the protective sleeve, the manufacturing process of the magnetic part is greatly simplified, the adaptation flexibility is improved, the strict requirement for high-precision tolerance in the manufacturing process of the magnetic part is effectively avoided, the key is more convenient to assemble, and the structure is more reasonable; in addition, the protective sleeve is adopted to effectively prevent the magnetic piece from directly colliding with the key seat, so that the magnetic piece is protected from being damaged, and the use safety and reliability of the key are further enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of key, concretely relates to a hall key. BACKGROUND

[0002] The hall key is widely used as a kind of non-contact switch device due to its long service life, high reliability and low power consumption.The traditional hall key design usually involves a hall element fixed on a PCB board and a movable handle, and the handle is directly fixed with a magnet.When the handle is pressed down, the magnet is close to the hall element, thereby changing the magnetic field distribution around the hall element, and further triggering the hall element to generate an electrical signal.

[0003] The design of the existing patent that the magnet is directly fixed on the handle has certain limitations, because the magnet and the handle are directly fixed, the position and direction of the magnet are often limited by the structure of the handle, and secondly, because the manufacturing tolerance of the magnet is large, the direct fixing mode of the magnet and the handle can increase the complexity and cost of manufacturing, because it is necessary to ensure the accurate positioning and firm fixation of the magnet, and it is necessary to more accurately ensure the accuracy of the magnet.In order to solve the above problems, a new hall key design is needed. SUMMARY

[0004] In view of the above problems, the utility model aims at providing a hall key with more reasonable structure.

[0005] To achieve the technical purpose, the utility model provides a kind of hall key, including the key seat on PCB board, and the handle that can be moved up and down in key seat, and the reset spring for the reset of handle, further including magnetic component and protective sleeve, the upper portion of protective sleeve is provided with the cavity for accommodating magnetic component, the bottom center of handle extends a guide column downward, the guide column can be assembled and inserted into the cavity of protective sleeve and encapsulates magnetic component in the cavity.

[0006] As preferred, the cross section of the protective sleeve is T-shaped structure, the top is provided with outwardly extending circular table, the circular table is matched with the bottom cavity of handle, and the upper end of reset spring is abutted below the circular table.

[0007] As preferred, the top of protective sleeve is provided with a circle of arc flared mouth with inner diameter greater than the inner diameter of cavity, the guide column is inserted via the arc flared mouth of the top of protective sleeve and is tightly connected with protective sleeve by interference fit.

[0008] As preferred, the key seat is provided with guide cavity matched with the outer diameter of protective sleeve, and protective sleeve can move axially in guide cavity, and the bottom center of protective sleeve extends a lug, and when handle is pressed to the lowest point, the lug at the bottom of protective sleeve can hit key seat to produce sound.

[0009] As preferred, the handle is provided with guide rails on both sides, the key seat is provided with guide frames on both sides, and the guide frames are provided with guide grooves matched with the guide rails.

[0010] As preferred, the PCB is further provided with LED lamp beads, the LED lamp beads are arranged on the side of the guide cavity, and the key seat is provided with empty grooves for accommodating the LED lamp beads.

[0011] The utility model discloses the beneficial effect is: through optimizing the assembly relation between magnetic piece, guide post and protective sleeve, greatly simplify the manufacturing process of magnetic piece, promote the flexibility of adaptation, and effectively avoid the strict requirement of high-precision tolerance in the manufacturing process of magnetic piece, make the key assembly more convenient, and the structure is more reasonable, in addition, the adoption of protective sleeve effectively prevents the impact of magnetic piece and key seat, protects the magnetic piece from damage, and further enhances the security and reliability of key use. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural diagram of the utility model;

[0013] Figure 2 It is the explosion drawing of the utility model;

[0014] Figure 3 It is the plan view of the utility model;

[0015] Figure 4 It is the structural diagram of the handle in the utility model;

[0016] Figure 5 It is the structural diagram of the protective sleeve and magnetic piece in the utility model;

[0017] Figure 6 It is the bottom structure diagram of the protective sleeve in the utility model;

[0018] Figure 7 It is the structural diagram of the key seat in the utility model;

[0019] Figure 8 It is the sectional view of the handle and protective sleeve in the utility model.

[0020] In the drawing: 1, PCB; 2, key seat; 21, guide cavity; 22, empty groove; 23, guide frame; 24, guide groove; 3, handle; 31, guide column; 32, guide rail; 4, return spring; 5, LED lamp bead; 6, magnetic piece; 7, protective sleeve; 71, cavity; 72, circular table; 73, arc flared; 74, lug. DETAILED DESCRIPTION

[0021] The utility model will be made further detailed description in combination with the drawings and specific embodiment. In order to clearly and completely describe technical scheme, therefore selects the following embodiment to explain, the following embodiment is a part of embodiment of the utility model, based on the application, other embodiments obtained under the premise of not making creative labor, all belong to the range of the utility model protection.

[0022] In the following examples, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of clearly describing the embodiment, and not indicate or imply that the device or element must have a particular orientation, therefore can not be understood as a limitation on the present application. At the same time, "first", "second" in the embodiment is only used for distinguishing description purposes, and not represent the relative importance of the indication or implication.

[0023] As shown in Figures 1-8 The utility model discloses a kind of hall key, including the key seat 2 on PCB board, and the press handle 3 that can move up and down in key seat 2, and reset spring 4 for the reset of press handle 3, further including magnetic piece 6 and protective sleeve 7, the upper portion of protective sleeve 7 is equipped with the cavity 71 for accommodating magnetic piece 6, the bottom center of press handle 3 extends a cylindrical guide column 31 downward, guide column 31 can be assembled and inserted into the cavity 71 of protective sleeve 7, with magnetic piece 6 is encapsulated in cavity 71, so that guide column 31, magnetic piece 6, protective sleeve 7 form a linkage assembly that can move with press handle 3;Specifically, the top of protective sleeve 7 is equipped with a circle arc flared mouth 73, the inner diameter of which is greater than the inner diameter of cavity 71, guide column 31 is inserted via the arc flared mouth 73 of the top of protective sleeve 7, and is tightly connected with protective sleeve 7 by interference fit.

[0024] Key seat 2 is equipped with guide cavity 21 matched with the outer diameter of protective sleeve 7, so that protective sleeve 7 reduces shaking when moving axially along guide cavity 21, thereby changing the magnetic flux of magnetic piece 6 received by hall element 5, and causing hall element 5 to generate corresponding electromagnetic signal.

[0025] Compared with the method of directly slotting on guide column 31 to install magnetic piece 6, the design of introducing protective sleeve 7 greatly simplifies the manufacturing process of magnetic piece 6, improves the flexibility of adaptation, and effectively avoids the strict requirement of high-precision tolerance in the manufacturing process of magnetic piece 6.

[0026] As shown in Figure 5As shown, the cross section of the protective sleeve 7 in the present key is T-shaped structure, the top of which is provided with a circular truncated cone 72 extending outward, the circular truncated cone 72 matches with the bottom cavity 71 of the handle 3, the reset spring 4 abuts below the circular truncated cone 72, the circular truncated cone 72 makes the assembly between the protective sleeve 7 and the handle 3 more compact, and at the same time provides a support area for the reset spring 4 to prevent deflection.

[0027] The handle 3 in the present key is provided with guide rails 32 on both sides, the key seat 2 is provided with guide frames 23 on both sides, and the guide frames 23 are provided with guide grooves 24 matching with the guide rails 32. The guide rails 32 of the handle 3 and the guide grooves 24 of the guide frames 23 on both sides of the key seat 2 are in sliding fit, which ensures the vertical movement accuracy.

[0028] In order to provide dazzling light, the PCB board 1 is further provided with LED lamp beads 5, the LED lamp beads 5 are arranged on the side of the guide cavity 21, and the key seat 2 is provided with an empty slot 22 for accommodating the LED lamp beads.

[0029] The present key is used in combination with a Hall element, when the handle 3 is pressed, the guide column 31 drives the protective sleeve 7 to move downward, the magnetic member 6 approaches the Hall element, the magnetic flux increases to trigger the voltage signal. After the handle 3 is released, the reset spring 4 pushes the circular truncated cone 72 to move upward, the protective sleeve 7 drives the handle 3 to reset, the magnetic flux decreases to make the Hall signal zero.

[0030] In addition, as shown in the drawings, Figure 6 The protective sleeve 7 extends a protrusion 74 at the bottom center position towards the guide cavity 21, the protective sleeve 7 is preferably made of plastic material, so that when the handle 3 is pressed to the lowest point, the protrusion 74 at the bottom of the protective sleeve 7 hits the key seat 2 to produce a crisp sound, providing a better physical confirmation feeling, and due to the protection of the protective sleeve 7, the magnetic member 6 will not directly hit the bottom of the key seat 2, and will not cause the magnetic member 6 to break, making the key more safe and reliable to use.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any slight modification, equivalent replacement and improvement made according to the technical essence of the present application to the above embodiment shall be included in the protection scope of the technical scheme of the present application.

Claims

1. A Hall key, comprising a key seat (2) on a PCB (1), a key handle (3) capable of moving up and down in the key seat (2), and a reset spring (4) for resetting the key handle (3), characterized in that: It also comprises a magnetic piece (6) and a protective sleeve (7), the upper part of the protective sleeve (7) is provided with a cavity (71) for accommodating the magnetic piece (6), the bottom center of the press handle (3) extends downwardly with a guide column (31), the guide column (31) can be assembled and inserted into the cavity (71) of the protective sleeve (7) to encapsulate the magnetic piece (6) in the cavity.

2. The Hall key according to claim 1, characterized in that: The cross section of the protective sleeve (7) is T-shaped structure, the top of which is provided with an outwardly extending circular truncated cone (72), the circular truncated cone (72) is matched with the bottom cavity (71) of the press handle (3), and the upper end of the reset spring (4) is abutted below the circular truncated cone (72).

3. The Hall key according to claim 2, characterized in that: The top of the protective sleeve (7) is provided with an arc-shaped flared opening (73) with an inner diameter larger than that of the cavity (71), the guide column (31) is inserted through the arc-shaped flared opening (73) at the top of the protective sleeve (7) and is tightly connected with the protective sleeve (7) by interference fit.

4. The Hall key according to claim 2, characterized in that: The key seat (2) is provided with a guide cavity (21) matched with the outer diameter of the protective sleeve (7), the protective sleeve (7) can axially move in the guide cavity (21), the protective sleeve (7) extends a protrusion (74) toward the bottom center position of the guide cavity (21), when the press handle (3) is pressed to the lowest point, the protrusion (74) at the bottom of the protective sleeve (7) can hit the key seat to produce sound.

5. The Hall key according to claim 4, characterized in that: The press handle (3) is provided with guide rails (32) on both sides, the key seat (2) is provided with guide frames (23) on both sides, the guide frames (23) are provided with guide grooves (24) matched with the guide rails (32).

6. The Hall key according to claim 5, characterized in that: The PCB board (1) is also provided with LED lamp beads (5), the LED lamp beads (5) are arranged on the side of the guide cavity (21), and the key seat (2) is provided with an avoidance slot (22) for accommodating the LED lamp beads (5).

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