Instrument key structure and instrument panel

Abstract

The utility model discloses an instrument button structure and an instrument panel. The instrument button structure comprises a housing, a PCB arranged in the housing, and a switch and a button arranged on the PCB. The key comprises a pressing part and a deformation part which are integrally arranged; the pressing part is arranged above the switch at an interval, and the height of the upper surface of the pressing part is equal to that of the upper surface of the shell; the deformation parts are located on the two sides of the pressing part and form deformation buffer areas. A sealing thin film is pasted on the upper surface of the shell, the part, located on the keys, of the sealing thin film protrudes out of the shell, and the sealing thin film and the upper surfaces of the keys are arranged in a spaced mode. The beneficial effects of the utility model are that the sealed space is formed between the sealing film and the housing, and the keys are sealed through the sealing film, so that tiny particles such as dust are effectively prevented from entering the space between the keys and the housing, the cleaning difficulty is reduced, and the normal use of the keys is ensured; meanwhile, the waterproof effect is achieved, and the service life of the PCB is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery manufacturing, and particularly relates to an instrument key structure and an instrument panel. Background Art

[0002] At present, the instrument keys of construction machinery usually consist of an instrument housing, a circuit board fixed in the instrument housing, a switch fixed on the circuit board, and a key fixed in the instrument housing and located above the switch.

[0003] The existing instrument key structures can refer to the patent CN202332650U, "Instrument Key Structure of Construction Machinery" or CN205194583U, "A Silicone Key Structure". Since the keys in the above existing patents are embedded in the card slots on the housing and there is a certain gap between the keys and the housing, during use, tiny particles such as dust and impurities will remain in this gap, increasing the cleaning difficulty and affecting the normal use of the keys.

[0004] In addition, the existing patent CN204029645U, "A New Silicone Bushing Key Structure" proposes a key structure that can solve the above problems. In this existing patent, the key is assembled onto the housing, and with the design of the U-shaped lip on the key, a sealed structure is formed between the key and the housing, effectively preventing the residue of tiny particles such as dust and impurities. In the existing technologies including this patent, most of the key surfaces protrude from the upper surface of the housing, and it is easy to cause misoperation or accidental touch during the cleaning process. Moreover, since the key structure in this patent is an integrated structure that is thick in the middle and thin at both sides, and in this existing patent, the bottom end of the key must be in contact with the top end of the switch to effectively trigger the switch when a force is applied to the middle area of the key; if there is a gap between the bottom end of the key and the top end of the switch, an increased force is required to effectively trigger the switch, so this patent has high requirements for structural precision and large processing difficulty.

[0005] In addition, due to the poor sealing performance between the key and the housing in the existing technologies including this patent, a bushing structure needs to be added in this patent to enhance the sealing effect of the mating surface between the key and the housing, which increases the production cost. Therefore, designing an instrument key structure and an instrument panel is an important technical problem that needs to be solved by those skilled in the art at present. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above problems existing in the prior art, and provide an instrument key structure and an instrument panel.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] Instrument key structure, including a housing, a PCB board disposed within the housing, a switch and a key disposed on the PCB board; the key includes a pressing portion and a deformation portion integrally provided; the pressing portion is spaced above the switch, and the upper surface of the pressing portion is at the same height as the upper surface of the housing; the deformation portion is located on both sides of the pressing portion and forms a deformation buffer zone; a sealing film is pasted on the upper surface of the housing, and the portion of the sealing film located at the key protrudes from the portion of the housing and is spaced from the upper surface of the key.

[0009] Preferably, the key wraps the switch; a gap is formed between the deformation portion and the side wall of the housing; and the bottom of the deformation portion is disposed between the housing and the PCB board and is in interference fit with the housing.

[0010] Preferably, the deformation buffer zone is a region where the deformation portion is bent towards the switch direction and is located in the plane of the gap between the pressing portion and the switch.

[0011] Preferably, an installation area for setting the sealing film is formed on the housing, and the periphery of the sealing film is bonded to the housing through waterproof glue.

[0012] Preferably, a pressure channel is formed between the portion of the sealing film located between two adjacent keys and the housing, and the gap between the sealing film and the key is communicated with the pressure channel.

[0013] Preferably, the key is made of silica gel; the sealing film is made of PC material.

[0014] Instrument panel, including the instrument key structure according to any one of the above, and a group of key areas disposed on the housing, with a ventilation channel provided between two adjacent key areas, and the ventilation channel is provided on the housing.

[0015] Preferably, a waterproof breathable film is provided at the top end of the ventilation channel, the upper surface of the waterproof breathable film is coplanar with the upper surface of the housing, and a pressure channel is formed between the waterproof breathable film and the sealing film.

[0016] The advantages of the technical solution of the present utility model are mainly reflected in:

[0017] A sealed space is formed between the sealing film and the housing, and the key is sealed by the sealing film, effectively preventing tiny particles such as dust from entering between the key and the housing, reducing the cleaning difficulty, ensuring the normal use of the key; at the same time, it plays a waterproof role and extends the service life of the PCB board;

[0018] Increase the air pressure balance in the enclosed space through the air pressure channel, effectively prevent a narrow sealing area from being formed by a single button, reduce the temperature and the impact on the sealing surface when pressing, ensure the sealing performance, and extend the service life of the sealing film.

[0019] The housing and the bottom of the deformation part are in interference fit to form a secondary seal, further ensuring excellent waterproof performance on the front of the button. At the same time, since the button has a deformation part, it has excellent trigger feedback performance. Brief Description of the Drawings

[0020] Figure 1 : Front view of the preferred embodiment of the present utility model;

[0021] Figure 2 : The present utility model Figure 1 Cross-sectional view in the A direction in;

[0022] Figure 3 : The present utility model Figure 2 Enlarged view of part C in;

[0023] Figure 4 : The present utility model Figure 2 Enlarged view of part D in;

[0024] Figure 5 : The present utility model Figure 2 Enlarged view of part E in;

[0025] Figure 6 : The present utility model Figure 2 Enlarged view of part F in. Detailed Description of the Preferred Embodiment

[0026] The purpose, advantages and characteristics of the present utility model will be illustrated and explained through the non-restrictive description of the preferred embodiments below. These embodiments are only typical examples of applying the technical solution of the present utility model. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present utility model.

[0027] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. And in the description of the solution, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0028] As Figures 1 to 2 shown, the present utility model discloses an instrument key structure, which includes a housing 1, a PCB board 2 disposed within the housing 1, and preferably, the housing 1 and the PCB board 2 are fixed by bolt connection. In other embodiments, the two can also be connected by known methods disclosed in the prior art such as welding, which is not limited herein. A switch 3 and a key 4 are disposed on the PCB board 2, and the key 4 wraps the switch 3.

[0029] As Figures 2 to 6 shown, a sealing film 5 is pasted on the upper surface of the housing 1. The part of the sealing film 5 located at the key 4 protrudes from the part of the housing 1 and is spaced from the upper surface of the key 4. The protruding part on the sealing film 5 can be processed by known techniques such as stamping. In this embodiment, the height is preferably designed to be 1 ± 0.5 mm. Of course, the specific height of the area of the sealing film 5 located on the key 4 can be adjusted according to the usage requirements, which is not limited herein.

[0030] Specifically, as shown in combination with Figures 1 to 2 shown, an installation area for setting the sealing film 5 is formed on the housing 1. The periphery of the sealing film 5 and the housing 1 are bonded by waterproof glue. A sealed space is formed between the sealing film 5 and the housing 1, and the key 4 is sealed through the sealing film 5, effectively preventing tiny particles such as dust from entering between the key 4 and the housing 1, reducing the cleaning difficulty, and ensuring the normal use of the key; meanwhile, it plays a waterproof role and extends the service life of the PCB board 2.

[0031] Since a sealed space is formed among the housing 1, the key 4, and the sealing film 5, the gas in this sealed space is affected by temperature and the pressing during use, resulting in pressure changes due to air pressure, which will accelerate the failure of the sealing surface, especially affecting the sealing performance between the housing 1 and the sealing film 5. Therefore, to reduce the influence of the air pressure in this sealed space, in the present utility model, preferably, an air pressure channel 105 as shown in Figure 4 and Figure 5 shown is formed between the part of the sealing film 5 located between two adjacent keys 4 and the housing 1. The gap between the sealing film 5 and the key 4 communicates with the air pressure channel 105. By means of the air pressure channel, the air pressure balance in the sealed space is increased, effectively preventing a narrow sealing area from being formed by a single key 4, reducing the influence of temperature and pressing during use on the sealing surface, ensuring the sealing performance, and extending the service life of the sealing film.

[0032] In addition, in the present utility model, it is preferably that the button 4 is made of silica gel; the sealing film 5 is made of PC material. In other embodiments, the button 4 can also be made of other known materials with elasticity or softness; the sealing film 5 can be made of known materials similar to those other than PC material, which will not be elaborated here.

[0033] As Figure 3 shown, the button 4 includes a pressing portion 41 and a deformation portion 42 which are integrally arranged; the pressing portion 41 is spaced above the switch 3, and the upper surface of the pressing portion 41 is at the same height as the upper surface of the housing 1, effectively preventing the situation of accidentally touching and triggering the switch, and at the same time ensuring the flatness of the button and the housing. Further, the gap between the pressing portion 41 and the switch 3 is preferably 0.8±0.2 mm.

[0034] A gap is formed between the deformation portion 42 and the side wall of the housing 1, and this gap can be used as the deformation space of the deformation portion 42. The bottom of the deformation portion 42 is arranged between the housing 1 and the PCB board 2 and is in interference fit with the housing 1; a secondary seal is formed through the interference fit between the housing 1 and the bottom of the deformation portion 42, further ensuring excellent waterproof performance on the front of the button. At the same time, since the button has a deformation portion, it has excellent trigger feedback performance.

[0035] As Figures 3 to 4 shown, the deformation portion 42 is located on both sides of the pressing portion 41 and forms a deformation buffer zone 421. Through the deformation buffer zone 421, the button 4 generates a small deformation force within a certain range of change, and the influence of this deformation force on the sealing film 5 and the switch 3 will also be reduced. Therefore, the requirements for the processing accuracy and assembly accuracy of the sealing film 5 and the switch 3 that cooperate with it can be reduced, and the product yield can be improved.

[0036] Further, the deformation buffer zone 421 is the bending area of the deformation portion 42 towards the switch 3 direction and is located on the plane of the gap between the pressing portion 41 and the switch 3. The position of the deformation buffer zone is selected in the middle area of the deformation portion 42, which does not affect the sealing fit between the button 4 and the housing 1, nor the assembly fit between the housing 1 and the PCB board 2.

[0037] When the button 4 is pressed to trigger the switch 3 and the button system works, deformation will occur on the button 4, and it is mainly concentrated at the deformation buffer zone 421, which can reduce the pressing force during operation, and at the same time the feedback force delivered to the switch 3 will also become smaller, thus improving the pressing feel of the button 4.

[0038] The present utility model also discloses an instrument panel, which includes the instrument button structure described in any one of the above, and a group of button areas 11 provided on the housing 1. In order to further reduce the influence of the air pressure in the sealing space between the sealing film 5 and the button 4, it is preferably provided with a ventilation channel 110 for pressure relief between two adjacent button areas 11, and the ventilation channel 110 is provided on the housing 1. Further, the top end of the ventilation channel 110 is provided with a waterproof breathable film 111, the upper surface of the waterproof breathable film 111 is coplanar with the upper surface of the housing 1, and an air pressure channel 105 is formed between the waterproof breathable film 111 and the sealing film 5. By reserving the air pressure channel 105 for balancing air pressure between the button 4 and the sealing film 5, the sealing film 5 corresponding to the air pressure channel 105 and the housing 1 are not sealed with sealant, effectively preventing the formation of a narrow sealed area in the button area, reducing the influence of the air pressure in the sealed space, and improving the service life of the button system.

[0039] There are still various implementation manners of the present utility model, and all technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present utility model.

Claims

1. An instrument key structure, comprising a housing (1), a PCB board (2) arranged in the housing (1), and a switch (3) and a key (4) arranged on the PCB board (2); characterized in that: The key (4) comprises a pressing portion (41) and a deformable portion (42) which are integrally arranged; the pressing portion (41) is arranged above the switch (3) at a distance, and the upper surface of the pressing portion (41) is at a height equivalent to the upper surface of the housing (1); the deformable portion (42) is located on both sides of the pressing portion (41) and forms a deformation buffer zone (421); a sealing film (5) is adhered to the upper surface of the housing (1); a portion of the sealing film (5) located at the key (4) protrudes from a portion of the housing (1) and is arranged at a distance from the upper surface of the key (4).

2. The instrument button structure according to claim 1, characterized in that: The button (4) wraps the switch (3); a gap is formed between the deformation portion (42) and the side wall of the housing (1); and the bottom of the deformation portion (42) is arranged between the housing (1) and the PCB board (2) and is interference-fitted with the housing (1).

3. The instrument button structure according to claim 2, characterized in that: The deformation buffer zone (421) is a region where the deformation portion (42) is bent in the direction of the switch (3), and is located in a plane where the gap between the pressing portion (41) and the switch (3) is located.

4. The instrument key structure according to claim 3, characterized in that: The housing (1) is provided with a placement area for arranging the sealing film (5), and the four sides of the sealing film (5) are bonded to the housing (1) by waterproof adhesive.

5. The instrument key structure according to claim 4, characterized in that: An air pressure channel (105) is formed between a portion of the sealing film (5) located between two adjacent keys (4) and the housing (1), and a gap between the sealing film (5) and the keys (4) is in communication with the air pressure channel (105).

6. The instrument key structure according to claim 5, characterized in that: The button (4) is made of silica gel; and the sealing film (5) is made of PC material.

7. Instrument panel, characterized by: It comprises the instrument button structure according to claim 6, and a group of button areas (11) arranged on the shell (1), a ventilation channel (110) is arranged between two adjacent button areas (11), and the ventilation channel (110) is arranged on the shell (1).

8. The instrument panel according to claim 7, characterized in that: A waterproof breathable membrane (111) is provided at the top of the breathable channel (110); the upper surface of the waterproof breathable membrane (111) is coplanar with the upper surface of the housing (1), and the air pressure channel (105) is formed between the waterproof breathable membrane (111) and the sealing film (5).

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