CN220963113U - Light guide structure of button and button structure - Google Patents

Abstract

The application provides a light guide structure of a key and a key structure, which are applied to the technical field of electrical equipment. By arranging the light guide ring, the light guide ring at least comprises a light guide part, the light guide part is provided with an obliquely arranged incident surface and a horizontally arranged emergent surface, and the incident surface is provided with a light scattering structure; the light shield is provided with a reflecting surface, the reflecting surface is concave, the light shield comprises a first reflecting surface connected with the incident surface and a second reflecting surface extending along the inclined downward direction from one end of the first reflecting surface far away from the incident surface, and the light shield is used for guiding light emitted by the LED lamp triggered by the key switch, so that the light guide ring of the key can be uniformly transmitted in a small space of compact equipment.

Description

Light guide structure of button and button structure

Technical Field

The application relates to the technical field of electrical equipment, in particular to a light guide structure of a key and a key structure.

Background

On the electrical equipment, many keys can add light effect. On one hand, the product is more attractive, and on the other hand, whether the equipment responds or not can be judged in an auxiliary mode through the on-off state of the lamplight. The structure of this part is usually composed of a key switch, a light guide ring, an LED lamp, a key body and a PCB board. The key switch is arranged in the diaphragm, the key body moves relative to the diaphragm, and a certain movable gap exists between the two parts. After the key body is pressed, the key switch is triggered, the LED lamp is lightened, and the light is transmitted to an external visible range through the light guide ring. The LED lamp is a point light source, the middle is brightest, and the outward brightness is gradually weakened. In order to make the light of the light guide ring more uniform, more than 4 LED lamps are generally adopted. The LED lamps have three arrangement modes: the first is arranged outside the projection ring outer ring of the guide aperture projected on the PCB; the second type is arranged in the projection ring of the guide aperture projected on the PCB; the third is that the light guide ring is arranged in the projection ring of the PCB. In the first mode, the arrangement outside the outer ring requires a larger PCB area, which is not beneficial to the application in a small space of more compact equipment; in the second mode, the light of the LED lamp can leak from a connecting gap between the key body and the light guide ring through arrangement inside the inner ring, so that local bright spots are formed, and the brightness uniformity of the ring is affected. In the third mode, the light directly passes through the light guide ring from the LED lamp to reach the visual surface of the appearance without refraction, the light and shade difference is most prominent, the punctiform light is clearly visible, and the requirement of uniform light effect required by the light guide ring is not met. Therefore, it is difficult to achieve uniform light transmission of the aperture in a small space of a compact device.

In view of the above, there is a need in the art for improvements.

Disclosure of utility model

The application aims to provide a light guide structure of a key and a key structure, which can realize the beneficial effect that the light guide ring of the key transmits light uniformly in a small space of compact equipment.

In a first aspect, the present application provides a light guiding structure of a key, which has the following technical scheme:

A light guide structure of button for carry out the leaded light to the light that is sent by the LED lamp that key switch triggered, include:

The light guide ring at least comprises a light guide part, wherein the light guide part is provided with an obliquely arranged incident surface and a horizontally arranged emergent surface, and the incident surface is provided with a light scattering structure;

The light shield is provided with a reflecting surface, the reflecting surface is concave and comprises a first reflecting surface connected with the incident surface and a second reflecting surface extending along an inclined downward direction from one end of the first reflecting surface away from the incident surface.

According to the light guide structure of the key, the light guide part is arranged in the light guide ring, so that light rays emitted by the LED lamp are guided to be emitted from the light guide part, and the inclined incident surface and the horizontal emergent surface are arranged in the light guide part, so that the light rays emitted by the LED lamp in a radial shape are refracted through the inclined incident surface and emitted to the horizontal emergent surface, the light rays are more uniform, and the light scattering structure of the incident surface can further scatter the light rays, so that the light rays are more uniform in emitting. The light shield is provided with the reflecting surface for reflecting the light of LED lamp emission on the light shield, guide the light to the incident surface in through leaded light portion and finally by the exit face effluvium, the reflecting surface is concave, including the first reflecting surface of being connected with the incident surface and the second reflecting surface that extends along the decurrent direction of slope from the one end that the incident surface was kept away from to first reflecting surface, first reflecting surface is used for reflecting the light that the LED lamp upwards shoots out, the second reflecting surface is used for reflecting the light that the LED lamp shoots out to the key switch, first reflecting surface and second reflecting surface are whole to be blocked up in the clearance between light guide ring and the key switch, reflect the light of LED to the incident surface and then the exit face of refraction, avoid the light of LED lamp to spill from the space of being connected between key switch and the light guide ring, form local bright spot, thereby influence the homogeneity of light, realize the even printing opacity of the light guide ring of key in the little space.

Further, the light guide ring further comprises a key installation part, wherein the key installation part is provided with a first installation through hole extending towards the vertical direction, and the first installation through hole is used for installing the key switch.

According to the light guide structure of the key, the key installation part is arranged in the light guide ring and is provided with the first installation through hole extending in the vertical direction, and the key switch is installed in the first installation through hole, so that the occupied area of the whole key on the PCB can be reduced, and the key miniaturization design is facilitated.

Further, the light guide ring further comprises a built-in mounting plane, and the built-in mounting plane is connected with the light guide part and the key mounting part; the built-in installation plane is provided with a positioning groove, and the positioning groove is used for fixing the light shield.

According to the light guide structure of the key, the built-in mounting plane is arranged in the light guide ring and is connected with the light guide part and the key mounting part, and the positioning groove is arranged on the built-in mounting plane and is used for fixing the light shield, so that the light shield and the light guide ring can be fixed together, a gap between the key switch and the light guide ring can be better blocked by the light shield, a gap between the key body and the light guide ring is further blocked, and light rays are guided to the incident surface.

Further, the light shield is provided with a second installation through hole and a positioning vertical rib, the outer wall of the second installation through hole is connected with the second reflecting surface, and the inner wall of the second installation through hole is sleeved on the key switch; the positioning vertical ribs are used for being inserted into the positioning grooves and fixed with the diaphragm.

According to the light guide structure of the key, the second installation through hole and the positioning vertical rib are arranged on the light shield, the outer wall of the second installation through hole is connected with the second reflecting surface, the inner wall of the second installation through hole is sleeved on the connection of the key switch, so that a gap between the light guide hole and the key switch is blocked, the gap between the light guide hole and the key body is blocked, light is prevented from leaking out of the gap, the positioning vertical rib is used for being inserted into the positioning groove to be fixed with the light guide hole, the second installation through hole is prevented from falling off from the key switch, and good light shielding effect cannot be achieved.

Further, the light scattering structure is in the shape of scale pattern.

Further, the incident plane forms an included angle of 30 degrees with the horizontal plane.

In a second aspect, the present application provides a key structure, which has the following technical scheme:

The key structure is provided with the light guide structure of any one of the keys.

Further, the button structure includes PCB board, key switch and LED lamp, and the LED lamp is cyclic annular distribution setting on the PCB board, and key switch sets up in the LED lamp of cyclic annular distribution, and the light guide ring setting is outside the LED lamp of cyclic annular distribution, and the lens hood setting is in LED lamp top position, reflects the light that the LED lamp sent to the incident plane through first reflection of light face and second reflection of light face.

Further, the novel multifunctional electric power button comprises a button body, wherein the button body comprises a limiting buckle, a mounting hole and a cross rib arranged in the mounting hole;

The limiting buckle extends along the axial direction of the diaphragm and is connected with the built-in mounting plane of the diaphragm;

The mounting hole is sleeved on the control rod at the top end of the key switch, and the cross rib is contacted with the control rod

Further, a clamping groove notch corresponding to the limiting buckle is formed in the built-in mounting plane.

The beneficial effects are that: according to the light guide structure of the key, the light guide part is arranged in the light guide ring, so that light rays emitted by the LED lamp are guided to be emitted from the light guide part, and the inclined incident surface and the horizontal emergent surface are arranged in the light guide part, so that the light rays emitted by the LED lamp in a radial shape are refracted through the inclined incident surface and emitted to the horizontal emergent surface, the light rays are more uniform, and the light scattering structure of the incident surface can further scatter the light rays, so that the light rays are more uniform in emitting. The light shield is provided with the reflecting surface for reflecting the light of LED lamp emission on the light shield, guide the light to the incident surface in through leaded light portion and finally by the exit face effluvium, the reflecting surface is concave, including the first reflecting surface of being connected with the incident surface and the second reflecting surface that extends along the decurrent direction of slope from the one end that the incident surface was kept away from to first reflecting surface, first reflecting surface is used for reflecting the light that the LED lamp upwards shoots out, the second reflecting surface is used for reflecting the light that the LED lamp shoots out to the key switch, first reflecting surface and second reflecting surface are whole to be blocked up in the clearance between light guide ring and the key switch, reflect the light of LED to the incident surface and then the exit face of refraction, avoid the light of LED lamp to spill from the connection space between key switch and the light guide ring, form local bright spot, thereby influence the homogeneity of light, realize the even printing opacity of the light guide ring of key in the little space.

Drawings

Fig. 1 is a general sectional view of a light guide structure of a key and a key structure provided by the application.

Fig. 2 is a schematic layout diagram of a key switch, a PCB board and an LED lamp provided by the application.

Fig. 3 is a perspective view of a diaphragm according to the present application.

Fig. 4 is another perspective view of the diaphragm provided by the present application.

Fig. 5 is a perspective view of a key body according to the present application.

Fig. 6 is a perspective view of a light shield according to the present application.

Fig. 7 is a front view of a light shield provided by the present application.

Fig. 8 is a light ray path diagram of the LED lamp provided by the present application.

In the figure: 1. a PCB board; 2. a key switch; 3. an LED lamp; 4. a diaphragm; 5. a key body; 6. a light shield; 7. a screw; 8. an equipment housing; 9. a spring; 101. projecting a circular ring; 401. a fixed plane; 402. a light guide section; 403. a built-in mounting plane; 404. a first mounting through hole; 405. a notch of the clamping groove; 406. an incidence surface; 407. a positioning groove; 408. An exit surface; 501. a mounting hole; 502. limiting buckle; 503. cross ribs; 601. an outer circle; 602. a second mounting through hole; 603. positioning the vertical ribs; 604. a reflecting surface; 6041. a first reflective surface; 6042. and a second reflecting surface.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

At present, a key with light arranged on an electrical device cannot enable the key to be in a small space of a compact device due to the arrangement mode of the light guide ring and the LED lamp, so that the effect of uniform light transmission of the light guide ring is achieved.

Referring to fig. 1 to 8, the light guiding structure of the key is configured to guide light emitted by the LED lamp 3 triggered by the key switch 2, and includes:

The light guide ring 4 at least comprises a light guide part 402, the light guide part 402 is provided with an incidence surface 406 which is obliquely arranged and an emergent surface 408 which is horizontally arranged, and the incidence surface 406 is provided with a light scattering structure;

The light shield 6 is provided with a reflecting surface 604, and the reflecting surface 604 is concave and comprises a first reflecting surface 6041 connected with the incident surface 406 and a second reflecting surface 6042 extending from one end of the first reflecting surface 6041 away from the incident surface 406 along an inclined downward direction.

In practical application, the key comprises a PCB (printed circuit board) 1, a key switch 2 and an LED lamp 3; the light guide structure comprises a light guide ring 4 and a light shield 6, wherein the light guide ring 4 is arranged on the PCB 1, the key switch 2 is also arranged on the PCB 1 and is nested in the light guide ring 4, a pin is arranged below the key switch and is connected with a circuit on the PCB 1, and the key switch can trigger the LED lamp 3 to be opened or closed. The key switch 2 passes through the inner square hole of the light shield 6, then the fixed plane 401 of the PCB 1 and the light guide ring 4 and the equipment shell 8 are aligned with the hole position of the screw 7, and the screw 7 is used for locking and fixing. The light shield 6 is used for shielding the gap between the key switch 2 and the light guide ring 4, and then shielding the gap between the key body and the light guide ring 4, so that the light of the LED lamp 3 is prevented from leaking out of the gap. The light guide ring 4 in the light guide structure provided by the application is nested outside the key switch 2, the light guide ring 4 comprises the light guide part 402, the light guide part 402 is made of semitransparent materials, light rays can be emitted through the semitransparent materials, and 10% of dispersing agent can be added into the light guide ring 4 in order to make the light effect more uniform and soft. Wherein, the diaphragm 4 is made of semitransparent material, and the other parts except the diaphragm 4 are made of opaque material.

The light guiding portion 402 is provided with an incidence plane 406 disposed obliquely and an exit plane 408 disposed horizontally, and in practical application, the incidence plane 406 is disposed proximate to the PCB board 1 and forms an included angle of 30 ° with the surface of the PCB board 1, so that the light emitted by the LED lamp 3 is refracted to the exit plane 408, and the emitted light is softer. Light rays which are not refracted and directly emitted through the light guide part 402 can cause poor display effect of the visual aperture, the light and shade difference is prominent, the punctiform light is clearly visible, and the requirement of uniform light effect required by the light guide aperture 4 is not met. In order to solve the problem, besides the inclined incident surface 406, an astigmatism structure may be disposed on the incident surface 406, specifically, a fish scale texture may be adopted, so that light rays may be scattered when passing through the astigmatism structure, and uniformity of the exit aperture is better ensured.

In the prior art, there is an arrangement in which the LED lamp 3 is disposed within the projection ring 101 of the light guide ring 4 projected on the PCB board 1, and this way, light of the LED lamp 3 leaks out from the gap between the light guide ring 4 and the key switch 2, which affects the brightness of the light guide ring. In order to solve the problem, a light shield 6 is arranged between the diaphragm 4 and the key switch 2 to shield the gap between the diaphragm 4 and the key body. In order to prevent the light shield 6 from shielding the gap and shielding part of the light emitted by the LED lamp 3 to influence the brightness of the aperture, the application arranges the reflecting surface 604 on the light shield 6, wherein the reflecting surface 604 is concave, which can better fit the gap and prevent the light from leaking out of the gap, the reflecting surface 604 comprises a first reflecting surface 6041 connected with the incident surface 406, wherein the connecting position is at one end of the incident surface 406 far away from the PCB board 1, so as to ensure that the first reflecting surface 6041 does not shield the incident surface 406 and the light is fully refracted through the incident surface 406. The first light reflecting surface 6041 extends to the one end that keeps away from the incident surface 406 to extend second light reflecting surface 6042 along the decurrent direction of slope, the decurrent second light reflecting surface 6042 of slope can make the LED lamp 3 to the better reflection of the light that the key switch 2 diverged to the incident surface 406 in, and the dog-ear position of second light reflecting surface 6042 and first light reflecting surface 6041 is smooth convex, avoids light to shoot into in the dog-ear of right angle form, influences the reflection effect of light.

Further, in some preferred embodiments, the diaphragm 4 further includes a key mounting portion, and the key mounting portion is provided with a first mounting through hole 404 extending in a vertical direction, and the first mounting through hole 404 is used for mounting the key switch 2.

In practical application, the diaphragm 4 further includes a key mounting portion, where the key mounting portion is provided with a first mounting through hole 404 extending in a vertical direction, and the first mounting through hole 404 is used for mounting the key switch 2. The key switch 2 is installed in the diaphragm 4 through the first installation through hole 404, the key switch 2 is accommodated in the diaphragm 4, the area of the PCB 1 occupied by the whole key structure is reduced, and the size of the PCB 1 is reduced. The first mounting through hole 404 may be circular, and extend along the axial direction of the diaphragm 4, and a cylinder with a diameter slightly larger than the outer diameter of the key switch 2 extends on the key mounting portion, so that the key switch 2 can be smoothly mounted in the first mounting through hole 404.

Further, in some preferred embodiments, the light guide ring 4 further includes a built-in mounting plane 403, and the built-in mounting plane 403 connects the light guide part 402 and the key mounting part; the built-in mounting plane 403 is provided with a positioning recess 407, and the positioning recess 407 is used for fixing the light shield 6.

In practical application, the light guide ring 4 further includes a built-in mounting plane 403, and the built-in mounting plane 403 connects the light guide part 402 with the key mounting part, where the light guide part 402 is disposed outside the key mounting part and may be cylindrical. After the light guide part 402 is connected with the key installation part through the built-in installation plane 403, the key switch 2 is arranged at the center of the light guide ring 4, the key installation part is arranged at the middle interval, the light guide part 402 is arranged at the outermost ring, and after the LED lamp 3 is triggered to be turned on through the key switch 2, the visual ring is finally displayed around the key switch 2, so that a user can be better prompted that the switch of an electric appliance is triggered. The positioning grooves 407 are formed in the built-in mounting plane 403, the positioning grooves 407 can be 4, are uniformly distributed along the built-in mounting plane 403 and are used for fixing the light shield 6, so that the light shield 6 can block the gap between the light guide part 402 and the key switch 2, and light leakage is avoided, and the brightness of an aperture is affected.

Further, in some preferred embodiments, the light shield 6 is provided with a second mounting through hole 602 and a positioning vertical rib 603, an outer wall of the second mounting through hole 602 is connected with the second light reflecting surface 6042, and an inner wall of the second mounting through hole 602 is sleeved on the key switch 2; the positioning vertical rib 603 is used for being inserted into the positioning groove 407 and fixed with the diaphragm 4.

In a specific arrangement, the light shield 6 is a light-tight plastic part, which is located between the LED lamp 3 and the inner plane of the light guide ring 4. The front view of the shade 6 is shaped like an outer circle and an inner square. The size of the outer circle 601 is slightly larger than the inner plane of the diaphragm 4, the size of the inner square hole is slightly larger than the shell shape of the key switch 2, and the unilateral gap is larger than 0.3mm, so that the smooth assembly is ensured.

The light shield 6 is provided with 4 positioning vertical ribs 603 from the side, and the end surfaces of the positioning vertical ribs 603 are contacted with the inner plane of the light guide ring 4, so that the light shield can be bonded through glue.

Viewed in cross section, the light shield 6 protrudes at a position close to the inner square hole (the corner protrusion of the first light reflecting surface 6041 and the second light reflecting surface 6042), the position close to the outer circle 601 is flat (the first light reflecting surface 6041 is flat), the circular arcs are in transition between the two, and the protruding direction is opposite to the positioning vertical ribs 603 (the direction of the second light reflecting surface 6042 is opposite to the positioning vertical ribs 603). The overall shape is similar to an inverted crater. The convex portion shields the inward light from leaking out of the gap of the key switch 2. An inclined upward and outward light guide channel is formed between the curved surface of the arc transition and the plane of the PCB 1, and the light of the LED lamp 3 irradiates on the incident surface at the bottom of the light guide ring 4 through the light guide channel, namely, the shape of the inner wall of the second installation through hole 602 is matched with the shape of the periphery of the key switch 2, if the shape of the periphery of the key switch 2 is rectangular, the shape of the inner wall of the second installation through hole 602 is also rectangular, and the outer wall of the second installation through hole 602 is tightly attached to completely block the gap between the light guide ring 4 and the key switch 2. The positioning vertical ribs 603 are used for being inserted into the positioning grooves 407 to be fixed with the diaphragm 4, and the positioning vertical ribs 603 can be fixed by glue after being inserted into the positioning grooves 407 in order to ensure the stability of fixation. In actual mounting structure, lead aperture 4 setting on PCB board 1, key switch 2 setting is in the inside of lead aperture 4, and key switch 2 passes through the circuit connection on pin and the PCB board 1, and light shield 6 is the cover of falling volcano form and establishes on key switch 2, and second installation through-hole 602 hugs closely key switch 2, and location erects muscle 603 and inserts downwards and fix in positioning groove 407, realizes sheltering from the effect in clearance between lead aperture 4 and the key switch 2.

Further, in some preferred embodiments, the light diffusing structure is in the shape of a ichthyosis.

In practical application, in order to further diffuse the light emitted by the LED lamp 3, so that the light emitted by the visual aperture is softer and more uniform, the light scattering structure of the incident surface 406 may be set to be in a scale pattern shape, so that the light is uniformly diffused, and in some preferred embodiments, the light scattering structure may also be set to be in a frosted surface or triangle tooth shape.

Further, in some preferred embodiments, the entrance face 406 is at an angle of 30 ° to the horizontal.

In practical application, the LED lamp 3 is a point light source fixed on the PCB board 1, the irradiation angle is 120 °, the light shield 6 is disposed above the LED lamp 3, the first light reflecting surface 6041 and the second light reflecting surface 6042 in the light shield 6 reflect the LED lamp 3, and the LED lamp 3 emits light source of the key switch 2 into the incident surface 406, the incident surface 406 forms an included angle of 30 ° with the horizontal plane, that is, forms an included angle of 30 ° with the surface of the PCB board 1, which is favorable to receiving the light emitted by the LED lamp 3, and refracts the light onto the emergent surface 408, and the light is favorable to make the light softer through the refraction of the incident surface 406, and the visible aperture has uniform brightness.

In a second aspect, the present application provides a key structure, which has the following technical scheme:

The key structure is provided with the light guide structure of any one of the keys.

The key structure provided by the application is provided with the light guide structure of any key, the light guide structure is sleeved outside the key structure, the gap between the light guide ring 4 and the key switch 2 is shielded by the cooperation of the light guide ring 4 and the light shield 6, the light source is prevented from leaking, the light emitted by the LED lamp 3 is refracted to the emergent surface 408 after being scattered from the incident surface 406 with the light scattering structure by the guidance of the light guide part 402 in the light guide ring 4, the luminous effect of the visual aperture is more uniform, and the key realizes the uniform light transmission effect of the light guide ring 4 in a small space of compact equipment.

Further, in some preferred embodiments, the key structure includes a PCB board 1, a key switch 2 and an LED lamp 3, where the LED lamp 3 is annularly distributed on the PCB board 1, the key switch 2 is disposed in the annularly distributed LED lamp 3, the key switch 2 is electrically connected to a circuit on the PCB board 1 through a pin, and can control the opening and closing of the LED lamp 3, the light guide ring 4 is disposed outside the annularly distributed LED lamp 3, the light shield 6 is disposed above the LED lamp 3, and light emitted by the LED lamp 3 is reflected to the incident surface 406 through the first reflective surface 6041 and the second reflective surface 6042.

In practical application, in order to conveniently squeeze the operating lever of the key switch 2, the LED lamp 3 is triggered to be turned on or turned off, specifically, the key switch 2 can be attached to the PCB board 1 and positioned at the center of the projection ring 101 of the diaphragm 4. After the key switch 2 triggers the LED lamp 3 to light, the light emitted by the LED lamp 3 exits in the range of 120 ° of illumination angle, the light shield 6 disposed above the LED lamp 3 totally reflects the light emitted by the LED lamp 3 in the direction of the key switch 2 towards the upper direction and towards the key switch 2 into the incident surface 406 by using the first reflective surface 6041 and the second reflective surface 6042, and the light finally reaching the exit surface 408 can present a uniform and soft aperture through scattering of the light scattering structure on the incident surface 406 and refraction of the incident surface 406.

Further, in some preferred embodiments, the key further comprises a key body 5, wherein the key body 5 comprises a limit buckle 502, a mounting hole 501 and a cross rib 503 arranged in the mounting hole 501;

The limiting buckle 502 extends along the axial direction of the diaphragm 4 and is connected with the built-in mounting plane 403 of the diaphragm 4;

The mounting hole 501 is sleeved on the top end of the key switch 2, and the cross rib 503 is contacted with the top end of the key switch 2.

In practical application, the key structure further comprises a key body 5, wherein the key body 5 is inserted from the upper part of the diaphragm 4 and fixed above the key switch 2, and is used for extruding the key switch 2 to trigger and open the LED lamp 3 arranged on the PCB 1. The key body 5 has a circular appearance, the back of the appearance is provided with 4 limit buckles 502, and the limit buckles 502 are arranged at the edges of the circular surface, and are respectively spaced by 90 degrees and are symmetrical. The center of the back of the appearance surface is provided with a mounting hole 501, and the mounting hole 501 plays a role in movable guiding. The mounting hole 501 has a raised cross rib 503 therein. The limiting buckle 502 extends along the axial direction of the diaphragm 4, is connected with the built-in mounting plane 403 of the diaphragm 4, fixes the key body 5 on the diaphragm 4, and the periphery of the key body 5 does not exceed the range of the periphery of the diaphragm 4, so as to realize miniaturization of the key structure. In order to enable the key body 5 to be inserted into and fixed to the diaphragm 4 from the upper portion of the diaphragm 4, the circular appearance surface of the key body 5 is matched with the cross section of the first mounting through hole 404 of the diaphragm 4, so that the key body 5 can be just embedded into the diaphragm 4. After the key is assembled in the diaphragm 4, the key is buckled through 4 limit buckles 502. After the engagement, the mounting hole 501 of the key body 5 is engaged with the first mounting through hole 404 of the diaphragm 4, and the key body 5 is limited and can only move along the axial direction of the diaphragm 4.

In practical application, in order to enable the key body 5 to automatically reset after being pressed, a spring 9 is sleeved on the operating rod of the key switch 2, one end of the spring 9 is connected with the key body 5, the inner diameter of the spring 9 is slightly larger than the diagonal dimension of the operating rod, and the outer diameter of the spring 9 is slightly smaller than the inner diameter of the mounting hole 501 of the key body 5.

When the user presses the key body 5, the key body 5 moves along the axial direction of the diaphragm 4 under the limiting and guiding actions of the diaphragm 4, and presses the operating lever of the key switch 2 below. The free travel of the key switch 2 is usually 1.5mm to 3mm, and after the set travel is reached, the control lever of the key switch 2 is locked, the key switch 2 is triggered, and the LED is turned on. The key is reset under the action of the elasticity of the spring 9.

Further, in some preferred embodiments, a slot notch 405 corresponding to the limit catch 502 is formed on the inner mounting plane 403.

In practical application, in order to fix the key body 5 on the diaphragm 4, a notch 405 corresponding to the limit buckle 502 may be disposed on the diaphragm 4, and after the limit buckle 502 is inserted into the notch 405, the limit buckle 502 moves along the axial direction of the diaphragm 4 under the limit action of the notch 405, so as to trigger the key switch 2.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A light guiding structure of button for carry out the leaded light to the light that LED lamp (3) that is triggered by key switch (2) sent, its characterized in that includes:

The light guide ring (4) at least comprises a light guide part (402), wherein the light guide part (402) is provided with an incidence surface (406) which is obliquely arranged and an emergent surface (408) which is horizontally arranged, and the incidence surface (406) is provided with a light scattering structure;

The light shield (6) is provided with a reflecting surface (604), the reflecting surface (604) is concave and comprises a first reflecting surface (6041) connected with the incidence surface (406) and a second reflecting surface (6042) extending from one end of the first reflecting surface (6041) away from the incidence surface (406) along an inclined downward direction.

2. The light guide structure of a key according to claim 1, wherein the light guide ring (4) further comprises a key mounting portion provided with a first mounting through hole (404) extending in a vertical direction, the first mounting through hole (404) being for mounting the key switch (2).

3. A key light guiding structure according to claim 2, wherein the light guiding ring (4) further comprises a built-in mounting plane (403), the built-in mounting plane (403) connecting the light guiding part (402) and the key mounting part; and a positioning groove (407) is formed in the built-in mounting plane (403), and the positioning groove (407) is used for fixing the light shield (6).

4. A light guide structure of a key according to claim 3, wherein the light shield (6) is provided with a second installation through hole (602) and a positioning vertical rib (603), the outer wall of the second installation through hole (602) is connected with the second reflecting surface (6042), and the inner wall of the second installation through hole (602) is sleeved on the key switch (2); the positioning vertical ribs (603) are used for being inserted into the positioning grooves (407) and fixed with the diaphragm (4).

5. The key light guide structure of claim 1, wherein the light scattering structure is in the shape of a fish scale pattern.

6. The light guiding structure of a key according to claim 1, wherein the incident surface (406) forms an angle of 30 ° with the horizontal surface.

7. A key structure, characterized in that the key structure is provided with a light guiding structure of a key according to any one of claims 1-6.

8. The key structure according to claim 7, characterized in that the key structure comprises a PCB board (1), a key switch (2) and an LED lamp (3), the LED lamp (3) is annularly distributed on the PCB board (1), the key switch (2) is disposed in the LED lamp (3) annularly distributed, a light guide ring (4) is disposed outside the LED lamp (3) annularly distributed, a light shield (6) is disposed above the LED lamp (3), and light emitted by the LED lamp (3) is reflected to an incident surface (406) through a first reflective surface (6041) and a second reflective surface (6042).

9. The key structure according to claim 8, further comprising a key body (5), wherein the key body (5) comprises a limit buckle (502), a mounting hole (501) and a cross rib (503) arranged in the mounting hole (501);

The limiting buckle (502) extends along the axial direction of the diaphragm (4) and is connected with the built-in mounting plane (403) of the diaphragm (4);

The mounting hole (501) is sleeved on the control rod at the top end of the key switch (2), and the cross rib (503) is in contact with the control rod.

10. The key structure according to claim 9, wherein the built-in mounting plane (403) is provided with a slot notch (405) corresponding to the limit buckle (502).