High-stability touch switch

Abstract

The invention provides a high-stability light touch switch which comprises a shell, a button and two contact piece sets are arranged on the shell, each contact piece set comprises a movable contact piece and a static contact piece, and the high-stability light touch switch is characterized in that an action block is arranged in the shell and is arranged between the button and the movable contact piece, the number of the contact piece sets is two, and the number of the static contact pieces is two. The two contact sheet groups are symmetrically arranged, the two movable contact sheets are opposite to each other and obliquely extend to the end part to be abutted against and matched with the lower part of the action block, the movable contact sheets are arranged in an elastic swinging manner, the action block can vertically slide under the driving of the button or the movable contact sheets, and the upper end of the action block is provided with a flat-column-shaped convex part. A contact part which is gradually reduced in a frustum shape is arranged below the button, an elastic piece is arranged between the protruding part and the contact part, and the two ends of the elastic piece extend in an arc shape to form abutting limiting with the shell. Aiming at the defects in the prior art, the invention provides the high-stability light touch switch which is small in size and high in stability.

Description

Technical Field

[0001] The present invention relates to the field of switches, and in particular to a highly stable tactile switch. Background Art

[0002] A tactile switch is an electronic switch. A tactile switch usually includes a button, a shrapnel, a moving contact piece, and a static contact piece. When the button is gently pressed by a finger, the shrapnel deforms, driving the moving contact piece to generate a deformation displacement and then contact with the static contact piece, thereby conducting the circuit and realizing the transmission of signals or the connection of electrical equipment. When the finger releases the button, the shrapnel returns to its original state, and the moving contact piece also resets, disconnecting the circuit. Tactile switches are commonly used in the field of automotive electronics. In this field, electronic devices often face complex and harsh working environments, and the stability of the product needs to be ensured. Moreover, with the rapid development of automotive technology and the increase in in-vehicle functions, the space for each functional component is limited. Therefore, there are very high requirements for the volume of the tactile switch. In order to ensure the volume of the tactile switch, it is easy to affect the stability and reliability of the product, and the overall adaptability of the product is weak. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a highly stable tactile switch with stronger adaptability and stability on the basis of ensuring a small volume.

[0004] To achieve the above object, the present invention provides a highly stable tactile switch, which includes a housing. A button and a contact piece group are arranged on the housing. The contact piece group includes a moving contact piece and a static contact piece. An action block is arranged in the housing. The action block is arranged between the button and the moving contact piece. There are two contact piece groups, and the two contact piece groups are symmetrically arranged. The two moving contact pieces face each other and extend obliquely to the end to abut and cooperate with the lower part of the action block. The moving contact piece is elastically swingably arranged, and the action block can slide vertically under the drive of the button or the moving contact piece. A raised part in the shape of a flat column is arranged at the upper end of the action block. A contact part in the shape of a gradually decreasing frustum is arranged below the button. A shrapnel is arranged between the raised part and the contact part. The two ends of the shrapnel extend in an arc shape to abut and limit with the housing.

[0005] The advantages of adopting the above technical solution are as follows: A button, a contact piece group and an action block are arranged in the housing. The action block is arranged between the button and the moving contact piece. When the button is pressed, the moving contact piece will be elastically swung by the movement of the action block. Finally, a spring piece is arranged between the convex part and the contact part. Such a setting can use different materials for the button and the action block respectively. For example, the button is made of elastic materials such as silicone, while the action block can be made of plastic. Utilizing the elasticity and wear resistance of silicone, it can withstand frequent pressing operations without being easily damaged, ensuring the service life and operation stability of the button. The plastic action block has certain rigidity and strength, and can maintain a stable shape and structure during the switching action, not being easily deformed, thus ensuring the cooperation accuracy and stability with the moving contact piece. When the product is relatively small and compact, it has better flexibility and stronger adaptability. And the spring piece located in the middle can, on the one hand, provide feedback for the user's pressing, and on the other hand, also provide a reset effect for the button. On this basis, the contact piece group is set to two and the two contact piece groups are symmetrical. On the one hand, the setting of the two contact piece groups can still form a connection normally even if one of them has an accident or a fault during operation, strengthening the stability of the product. On the other hand, this symmetrical structure makes the switch more evenly stressed during the working process. When the button is pressed, the force can be evenly transmitted to the two moving contact pieces, avoiding problems such as local wear or poor contact caused by uneven stress, thereby improving the stability and reliability of the switch. Finally, a frustum is arranged below the button and a convex part is arranged on the action block respectively, which can ensure the efficient conduction of force from the button to the action block, reduce the dispersion and loss of force, and enhance the user experience.

[0006] The present invention can be further set as: The lower end of the action block is provided with abutting convex ribs corresponding to the two moving contact pieces respectively, and the abutting convex ribs are arranged in an arc shape.

[0007] Through further setting, the arrangement of the abutting convex ribs concentrates the force received by the action block at the part in contact with the moving contact piece, and then better transmits the force to the moving contact piece. Due to the good cooperation between the abutting convex ribs and the moving contact piece, the force can be accurately conducted along the designed path during the transmission process, reducing the loss and scattering of the force, and improving the conduction efficiency and reliability of the switch.

[0008] The present invention can be further set as: The end of the moving contact piece extends laterally to form a strip-shaped contact surface, and the contact surface is in abutting cooperation with the abutting convex ribs.

[0009] Through further setting, the strip-shaped contact surface formed by the lateral extension of the end of the contact piece has a significantly increased contact area with the abutting rib compared to ordinary point or small-area contacts. This enables the force to be more evenly distributed on the moving contact piece, avoiding local stress concentration, thereby achieving stable and efficient conduction of force from the abutting rib to the moving contact piece. The larger contact area can also make the connection between the moving contact piece and the action block more stable.

[0010] The present invention can be further set as follows: the moving contact piece includes a swinging portion located in the middle thereof, and a groove portion corresponding to its length direction is provided on the swinging portion.

[0011] Through further setting, the swinging portion provided in the middle of the moving contact piece and the groove portion corresponding to its length direction provided on the swinging portion can effectively increase the elastic deformation ability of the moving contact piece. The presence of the groove portion enables the swinging portion to bend and deform more flexibly when subjected to an external force.

[0012] The present invention can be further set as follows: the housing includes a base, an installation block is provided in the base, an assembly groove is provided on the installation block, the assembly groove penetrates the upper and lower ends of the installation block, and the assembly groove is provided in alignment with the contact piece group. A guiding sliding fit is formed between the installation block and the inner wall of the assembly groove.

[0013] Through further setting, there is an assembly groove on the installation block provided in the base, and the assembly groove is provided in alignment with the contact piece group. This provides precise positioning for the installation of the contact piece group. During the installation process, only by aligning the contact piece group and placing it into the assembly groove can the relative positions of the contact piece group and other components be ensured to be accurate without error, reducing the adjustment and calibration steps during the installation process and improving the installation efficiency. And a guiding sliding fit is formed between the installation block and the inner wall of the assembly groove, which provides a clear guiding for the installation of the action block. The action block can smoothly slide along the inner wall of the assembly groove to the designated position, strengthening the stability of the product.

[0014] The present invention can be further set as follows: an installation groove for accommodating the installation block is provided on the base, a stepped surface and an extension groove are provided in the installation groove, the stepped surface is provided at the upper and lower sides of the installation groove, both ends of the elastic piece are limited to the housing by abutting against the stepped surface, the extension groove is provided at the lateral sides of the installation groove, and both ends of the installation block extend into the extension groove.

[0015] Through further setting, by providing an installation groove in the base, setting the installation groove to have a stepped surface and an extension groove, arranging the extension groove at the lateral sides of the installation groove, and extending both ends of the installation block into the extension groove to form circumferential limitation between the installation block and the base, strengthening the stability, and then making both ends of the elastic piece abut against the stepped surface to form limitation with the housing.

[0016] The present invention can be further configured as follows: guiding ribs are provided on the side wall of the action block, the guiding ribs are arranged in an arc-shaped convex shape, and the guiding ribs are in abutting fit with the inner wall of the assembly groove.

[0017] Through further setting, when the arc-shaped guiding ribs contact the inner wall of the assembly groove, it is a line contact rather than a surface contact. Compared with the plane contact method, this line contact can effectively reduce the friction between the two. When installing or operating the switch, the smaller friction makes the operation smoother, reducing the possibility of component damage, difficult installation, and unsmooth operation caused by excessive friction.

[0018] The present invention can be further configured as follows: the mounting block includes a retaining edge, the retaining edge covers above the two transverse ends of the assembly groove, and the mounting block can form an abutting limit with the retaining edge.

[0019] Through further setting, the retaining edge covers above the two transverse ends of the assembly groove, providing a clear positioning for the installation of the mounting block. By forming an abutting limit with the retaining edge, misalignment or deviation during installation or use is avoided, and the simple structure also facilitates making the product smaller in size.

[0020] The present invention can be further configured as follows: the contact piece group includes a connecting piece, one end of the connecting piece is embedded in the bottom surface of the base, the moving contact piece includes a conductive part attached to one end of the connecting piece, and the mounting block can press the conductive part against the connecting piece.

[0021] Through further setting, one end of the connecting piece is embedded in the bottom surface of the base. This design makes it only necessary to accurately embed the connecting piece into the preset position on the bottom surface of the base during installation, without complex installation processes or additional fixing devices. Then, by attaching the moving contact piece above the connecting piece and pressing the conductive part against the connecting piece with the mounting block, the installation of the moving contact piece and the connecting piece can be completed conveniently and quickly, and stability and reliability can be ensured. Moreover, with the connecting piece embedded in the bottom surface of the base and the moving contact piece attached to the connecting piece, this design method makes full use of the space on the bottom surface of the base, avoiding the space waste caused by the scattered layout of components in the traditional installation method. The close cooperation between each component makes the overall structure of the contact piece group more compact and effectively reduces the volume.

[0022] The present invention can be further configured as follows: the housing includes an upper cover for forming a snap connection with the base. There are snap columns at the four-week of the upper end surface of the base. The button is made of silicone material. Below the button includes a sealing part. The sealing part can cover the base and is provided with a notch corresponding to the position of the snap column. The upper cover and the base can form a clamping of the sealing part.

[0023] Through further setting, the upper cover of the housing is connected to the base by a snap - fit method. There are snap - posts around the upper end surface of the base. During installation, just align the upper cover with the snap - posts of the base and press it down to achieve the quick connection of the two, without using complex connecting parts such as screws, greatly simplifying the installation process and improving the installation efficiency. The button is made of silicone material, forming a sealing part below it, and when the upper cover and the base are snap - fitted, it can be clamped, thus forming a good sealing effect to protect the electronic components in the base from the influence of the external environment. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention; Figure 2 It is a top view of an embodiment of the present invention; Figure 3 It is an embodiment of the present invention Figure 2 The cross - sectional view taken along A - A in; Figure 4 It is an embodiment of the present invention Figure 2 The cross - sectional view taken along B - B in; Figure 5 It is a schematic diagram of the cooperation between the button and the base in an embodiment of the present invention; Figure 6 It is a schematic diagram of the internal structure in an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the action block in an embodiment of the present invention; Figure 8 It is a schematic diagram of the cooperation between the moving contact piece and the connecting piece in an embodiment of the present invention; Figure 9 It is a schematic diagram of the structure of the mounting block in an embodiment of the present invention; Figure 10 It is a schematic diagram of the structure of the elastic piece in an embodiment of the present invention; Wherein: housing 1; base 11; snap - post 111; upper cover 12; installation groove 13; step surface 14; extension groove 15; button 2; contact part 21; sealing part 22; notch 221; contact piece group 3; moving contact piece 31; contact surface 311; swinging part 312; groove part 313; conductive part 314; static contact piece 32; connecting piece 33; action block 4; convex part 41; abutting rib 42; guiding rib 43; notch part 44; elastic piece 5; mounting block 6; assembly groove 61; retaining edge 62; limiting block 63; guiding protrusion 64; large end 641. Detailed Embodiment

[0025] An embodiment of a highly stable tactile switch of the present invention is as Figure 1-10As shown in the figure: It includes a housing 1, in which a button 2, two contact sets 3 and an action block 4 are arranged. Each contact set 3 includes a moving contact 31 and a static contact 32. The action block 4 is arranged between the button 2 and the moving contact 31. The two contact sets 3 are symmetrically arranged. The two moving contacts 31 face each other and extend obliquely to the end to abut and cooperate with the lower part of the action block 4. The moving contact 31 is elastically swingably arranged, and the action block 4 can move vertically downward driven by the button 2, and the action block 4 can be vertically reset upward driven by the reset of the moving contact 31.

[0026] A flat-columnar convex part 41 is arranged at the upper end of the action block 4. A contact part 21 which is tapered and gradually smaller is arranged below the button 2. A spring piece 5 is arranged between the convex part 41 and the contact part 21. The two ends of the spring piece 5 extend in an arc shape to abut and be limited with the inner wall of the housing 1.

[0027] At the lower end of the action block 4, abutting ribs 42 corresponding to the two moving contacts 31 are arranged. The abutting ribs 42 are arranged in an arc shape.

[0028] A strip-shaped contact surface 311 is formed by the lateral extension of the end of the moving contact 31. The contact surface 311 abuts and cooperates with the abutting rib 42.

[0029] The moving contact 31 includes a swinging part 312 at the middle thereof. A groove part 313 corresponding to its length direction is arranged on the swinging part 312.

[0030] The housing 1 includes a base 11. An installation block 6 is arranged in the base 11. An assembly groove 61 is arranged on the installation block 6. The assembly groove 61 penetrates through the upper and lower ends of the installation block 6 and is arranged opposite to the contact set 3. The installation block 6 forms a guiding and sliding fit with the inner wall of the assembly groove 61.

[0031] An installation groove 13 for accommodating the installation block 6 is arranged on the base 11. A step surface 14 and an extension groove 15 are arranged in the installation groove 13. The step surface 14 is arranged at the upper and lower sides of the installation groove 13. The two ends of the spring piece 5 in the length direction are limited with the housing 1 by abutting on the step surface 14. The extension groove 15 is arranged at the lateral sides of the installation groove 13. The two ends of the installation block 6 extend into the extension groove 15. In this embodiment, limiting blocks 63 are arranged at the two ends of the installation block 6. The two limiting blocks 63 abut and cooperate with the two sides in the width direction of the spring piece 5. This enables the base 11 to form a circumferential anti-rotation limit for the installation block 6, and the limiting blocks 63 on the installation block 6 abut the two sides of the spring piece 5 again to form anti-rotation of the spring piece 5. And during the installation process, only by putting them in sequence can the respective limiting fits be formed, which can ensure stability and is also convenient for installation.

[0032] A guiding rib 43 is provided at the side wall of the action block 4. The guiding rib 43 is arranged in an arc-shaped convex shape, and the guiding rib 43 is in abutting fit with the inner wall of the assembly groove 61.

[0033] The mounting block 6 includes a retaining edge 62. The retaining edge 62 is formed below the protruding part. The retaining edge 62 covers the upper parts of the two transverse ends of the assembly groove 61. The mounting block 6 can form an abutting limit with the retaining edge 62. A guiding protrusion 64 is arranged below the part of the mounting block 6 where the retaining edge 62 is located. The guiding protrusion 64 includes a large end 641 at the lower part. The action block 4 includes notch parts 44 at both ends. The notch parts 44 are arranged in an arc shape. The action block 4 can be in guiding sliding fit with the guiding protrusion 64 through the notch parts 44, and the action block 4 will form an abutting fit at the large end 641. Due to the arrangement of the retaining edge 62, the action block 4 needs to be inserted into the assembly groove 61 through the lower part of the mounting block 6, and then the mounting block 6 is reversed and inserted into the mounting groove 13. Such an arrangement can, on the one hand, enable the action block 4 to form a preliminary limit through the cooperation of the large end 641 after being inserted into the mounting block 6, and no additional limiting operation is required during the process of reversing the mounting block 6 and inserting it into the mounting groove 13, which is convenient for installation. On the other hand, it can guide the movement of the action block 4 through the guiding protrusion 64 to ensure stability.

[0034] The contact piece group 3 includes connecting pieces 33. In this embodiment, there are a total of four connecting pieces 33. One end of each connecting piece 33 is embedded in the bottom surface of the base 11. The two moving contact pieces 31 respectively include conductive parts 314 attached to one end of the two connecting pieces 33. The mounting block 6 can press the conductive parts 314 against the connecting pieces 33. The static contact piece 32 is formed by extending from the other two connecting pieces 33.

[0035] The housing 1 includes an upper cover 12 for forming a snap connection with the base 11. There are snap columns 111 at the periphery of the upper end surface of the base 11. The button 2 is made of silica gel material. The lower part of the button 2 includes a sealing part 22. The sealing part 22 can cover the base and is provided with a notch 221 corresponding to the position of the snap column 111. The upper cover 12 and the base 11 can clamp the sealing part 22.

[0036] The above examples are only one of the preferred specific examples of the present invention. The common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A high-stability touch switch, comprising a housing, wherein a button and a contact piece group are arranged on the housing, wherein the contact piece group comprises a moving contact piece and a stationary contact piece, and wherein: An action block is provided in the shell, and the action block is arranged between the button and the moving contact piece. There are two contact piece groups, and the two contact piece groups are symmetrically arranged. The two moving contact pieces are opposite and extend obliquely to the ends to abut and cooperate with the bottom of the action block. The moving contact piece is elastically swinging, and the action block can slide vertically driven by the button or the moving contact piece. A flat columnar protrusion is provided on the upper end of the action block, and a contact portion with a cone-shaped gradually smaller shape is provided under the button. A spring piece is provided between the protrusion and the contact portion, and both ends of the spring piece extend in an arc shape to form an abutment limit with the shell.

2. The high stability touch switch according to claim 1, characterized in that: The lower end of the action block is provided with abutting convex ribs corresponding to the two moving contact pieces respectively, and the abutting convex ribs are arranged in an arc shape.

3. The high stability touch switch according to claim 2, characterized in that: The end of the movable contact piece extends laterally to form a long strip-shaped contact surface, and the contact surface is in abutment with the abutment convex rib.

4. The high stability touch switch according to claim 3, characterized in that: The movable contact piece includes a swinging portion located in the middle thereof, and a groove portion corresponding to the length direction thereof is provided on the swinging portion.

5. The high stability touch switch according to claim 1, 2, 3 or 4, characterized in that: The shell includes a base, a mounting block is arranged in the base, an assembly groove is arranged on the mounting block, the assembly groove runs through the upper and lower ends of the mounting block, and the assembly groove is arranged to align with the contact group, and the mounting block forms a guiding sliding fit with the inner wall of the assembly groove.

6. The high stability touch switch according to claim 5, characterized in that: The base is provided with a mounting groove for accommodating the mounting block, and the mounting groove is provided with a step surface and an extension groove. The step surface is provided at the upper and lower sides of the mounting groove, and the two ends of the spring sheet form a limit with the shell by abutting on the step surface. The extension groove is provided at the two lateral sides of the mounting groove, and the two ends of the mounting block extend into the extension groove.

7. The high stability touch switch according to claim 5, characterized in that: A guide convex rib is arranged on the side wall of the action block, and the guide convex rib is arranged in an arc-shaped convex shape, and the guide convex rib is abutted and matched with the inner wall of the assembly groove.

8. The high stability touch switch according to claim 5, characterized in that: The mounting block comprises a retaining edge, and the retaining edge covers the upper part of the two transverse ends of the assembly groove, and the mounting block can form an abutment limit with the retaining edge.

9. The high stability touch switch according to claim 5, characterized in that: The contact piece group includes a connecting piece, one end of which is embedded in the bottom surface of the base, and the movable contact piece includes a conductive part attached to one end of the connecting piece, and the mounting block can press the conductive part tightly against the connecting piece.

10. The high stability touch switch according to claim 1 or 2 or 3 or 4 or 7 or 8, characterized in that: The shell includes an upper cover for forming a snap connection with the base, and there are clamping columns around the upper end surface of the base. The button is made of silicone material, and a sealing part is included below the button. The sealing part can cover the base and is provided with a notch corresponding to the position of the clamping column. The upper cover and the base can form a clamp for the sealing part.

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