A Rotating and Telescopic Conductive Switch for PCB

Abstract

The invention discloses a rotary telescopic conduction switch for a PCB, comprising a housing, a PCB, a conductive metal sheet and a rotating shaft, wherein the PCB is fixedly arranged at the bottom of the inner cavity of the housing, and at least two conductive springs are arranged on the upper surface of the PCB; the rotating shaft is rotatably arranged in the housing, and its upper end passes through the top surface of the housing; a rotating terminal is fixedly sleeved on the rotating shaft, and a plurality of limiting grooves are provided on the upper end surface of the rotating terminal, and a plurality of limiting posts matching the limiting grooves are provided on the top of the inner cavity of the housing; a rotating shaft spring is connected between the rotating shaft and the PCB; the conductive metal sheet and the rotating shaft are linked in the vertical direction, so that when the rotating shaft moves downward until the limiting post is separated from the limiting groove, the conductive metal sheet abuts against the conductive spring. The PCB conduction switch of the invention is relatively stable and safe, and is efficient and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of PCB conduction of electrical appliances, and in particular to a rotary telescopic conduction switch of a PCB. Background Art

[0002] PCB (Printed Circuit Board), also known as printed circuit board in Chinese, is an important electronic component in electrical appliances. In some commercial appliances such as commercial gas stoves, PCB is required for circuit control, temperature sensor control, etc. However, there is currently no relatively stable, safe, effective and convenient conduction method for PCB. Therefore, it is urgent to invent a conduction switch device for PCB of commercial appliances. Summary of the invention

[0003] The purpose of the present invention is to provide a rotary telescopic conduction switch for a PCB, aiming to achieve a relatively stable, safe, effective and convenient PCB conduction method.

[0004] The above technical problem of the present invention is mainly solved by the following technical solution: a PCB rotary telescopic conduction switch, comprising a housing, a PCB, a conductive metal sheet and a rotating shaft, the PCB is fixedly arranged at the bottom of the inner cavity of the housing, and at least two conductive springs are arranged on the upper surface of the PCB;

[0005] The rotating shaft is rotatably arranged in the shell, and its upper end passes through the top surface of the shell; a rotating terminal is fixedly sleeved on the rotating shaft, and a plurality of limiting grooves are opened on the upper end surface of the rotating terminal, and a plurality of limiting columns matching the limiting grooves are arranged on the top of the inner cavity of the shell; a rotating shaft spring is connected between the rotating shaft and the PCB;

[0006] The conductive metal sheet is linked with the rotating shaft in the vertical direction, so that when the rotating shaft moves downward until the limiting column is separated from the limiting groove, the conductive metal sheet abuts against the conductive spring.

[0007] A further configuration is that an elastic damping sheet is provided in the housing, and the elastic damping sheet elastically contacts the side surface of the rotating terminal.

[0008] A further configuration is that a protrusion is provided in the middle of the elastic damping sheet, and a groove matching the protrusion is provided on the side of the rotating terminal, and when the limiting groove corresponds to the limiting column, the protrusion is located in the groove.

[0009] Further, the rotary terminal is stepped, a through hole is formed in the conductive metal sheet with a size matching that of the smaller outer diameter section of the rotary terminal, the smaller outer diameter section of the rotary terminal is inserted into the through hole, and the stepped surface of the rotary terminal contacts the conductive metal sheet.

[0010] Further, two guiding columns are vertically arranged in the inner cavity of the housing, the conductive metal sheet can move up and down along the guiding columns, a conductive metal sheet damping spring is sleeved on the guiding columns, and two ends of the conductive metal sheet damping spring respectively abut against the lower surface of the conductive metal sheet and the bottom surface of the inner cavity of the housing.

[0011] Further, an external circuit interface is provided on the back of the PCB.

[0012] Further, the housing includes a shell body and a rear cover, the shell body is a trough body with an open bottom, and the rear cover covers the bottom of the shell body.

[0013] Further, the rear cover is provided with an opening for the external circuit interface to pass through.

[0014] Further, a knob is fixedly arranged at the top of the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: A rotary telescopic conduction switch for a PCB provided by the present invention can drive the conductive metal sheet to contact the conductive spring by pressing down the rotating shaft, thereby conducting the PCB. At this time, the limiting column disengages from the limiting groove, and the rotating shaft can maintain the conducting state after rotating a certain angle; after the rotating shaft rotates 360°, the limiting column corresponds to the limiting groove again, and under the elastic force of the rotating shaft spring, the limiting column is inserted into the limiting groove, and the conductive metal sheet leaves the conductive spring, disconnecting the electrical signal of the PCB. The PCB conduction switch provided by the present invention is relatively stable, safe, and has efficient and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded structural schematic diagram of the present invention.

[0017] Figure 2 is a sectional structural schematic diagram of the present invention.

[0018] Figure 3 is a three-dimensional structural schematic diagram of the rotating shaft in the present invention.

[0019] Figure 4 is a structural schematic diagram of another view angle of the rotating shaft in the present invention.

[0020] Figure 5 is a sectional structural schematic diagram of the rotating shaft in the present invention.

[0021] Figure 6 This is a schematic structural diagram of the elastic damping sheet in the present invention.

[0022] In the figure: 1. Outer shell, 11. Shell body, 12. Rear cover, 13. Rear cover groove, 14. Limit post, 15. Guide post; 2. PCB, 21. Conductive spring, 22. External circuit interface; 3. Rotating shaft, 31. Rotating terminal, 32. Limit groove, 33. Rotating shaft spring, 34. Groove; 4. Conductive metal sheet, 41. Guide hole, 42. Conductive metal sheet damping spring; 5. Elastic damping sheet, 51. Protrusion. Detailed implementation mode

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further specifically described below through embodiments in conjunction with the accompanying drawings.

[0024] Embodiment: A rotary telescopic conduction switch for a PCB, as Figure 1-6 shown, includes an outer shell 1, a PCB 2, a conductive metal sheet 4 and a rotating shaft 3.

[0025] The outer shell 1 is composed of a shell body 11 and a rear cover 12. The shell body 11 is in the shape of a trough with an open bottom. After the rear cover 12 covers the bottom of the shell body 11, a square cavity is formed. The PCB 2 is arranged at the bottom of the inner cavity of the outer shell 1. A plurality of conductive springs 21 are arranged on its upper surface. The conductive springs 21 are electrically connected to each other to conduct the electrical signal of the PCB. An external circuit interface 22 is provided on the back of the PCB. Correspondingly, an opening for the external circuit interface 22 to pass through is provided on the rear cover 12 to facilitate external connection of external wires.

[0026] In this embodiment, the rotating shaft 3 passes through the outer shell 1, and its upper end passes through the top surface of the outer shell 1. A knob (not shown in the figure) is fixedly provided at its top; a rear cover groove 13 extending downward is provided on the rear cover 12. The bottom end of the rotating shaft 3 can be inserted into the rear cover groove 13 after passing through the PCB. The rotating shaft 3 can rotate along its axial direction on the one hand and can move up and down telescopically on the other hand. A rotating terminal 31 is fixedly sleeved on the part of the rotating shaft 3 located inside the outer shell 1. The rotating terminal 31 is in a stepped shape, composed of a cylindrical section with a smaller outer diameter and a top step. A plurality of limit grooves 32 are provided on its upper end surface. Limit posts 14 matching the limit grooves 32 are provided at the top of the inner cavity of the outer shell 1. In this embodiment, the distribution and cross-sectional shape of the limit posts 14 are both designed irregularly, as long as the heights are the same. Such a setting makes the rotating shaft 3 rotate 360° back to the original position before the limit posts 14 can be inserted into the limit grooves 32 again.

[0027] In this embodiment, two guiding columns 15 are vertically arranged in the inner cavity of the outer shell 1. Guiding holes 41 matching the guiding columns 15 are formed in the conduction metal sheet 4, so that the conduction metal sheet 4 can move up and down along the guiding columns 15. Additionally, a conduction metal sheet damping spring 42 is sleeved on the guiding column 15, and its two ends respectively abut against the lower surface of the conduction metal sheet 4 and the bottom surface of the inner cavity of the outer shell 1, so that the conduction metal sheet 4 is subjected to the elastic force of the conduction metal sheet damping spring 42 when moving downward. A through hole is further formed in the middle part of the conduction metal sheet 4, and the size of the through hole matches the size of the smaller cylindrical section of the outer diameter of the rotating terminal 31. The smaller cylindrical section of the outer diameter of the rotating terminal 31 is inserted into the through hole. Under the action of the elastic force of the conduction metal sheet damping spring 42, the conduction metal sheet 4 abuts against the step surface of the rotating terminal 31.

[0028] In the above structure, a rotating shaft spring 33 is arranged between the rotating shaft 3 and the PCB. The rotating shaft spring 33 is sleeved on the relatively lower part of the rotating shaft 3, its upper end can abut against the lower end surface of the rotating terminal 31, and its lower end abuts against the upper surface of the PCB. When the rotating shaft 3 is integrally moved downward by pressing the knob, the rotating shaft spring 33 will contract. After the limiting column 14 completely disengages from the limiting groove 32, the rotating shaft 3 can be rotated by the knob to displace the limiting column 14 and the limiting groove 32. At the same time, under the action of the elastic force of the rotating shaft spring 33, the rotating shaft 3 will maintain at this height. At this time, the conduction metal sheet 4 contacts the conductive spring 21, thereby connecting the electrical signal of the PCB. When the rotating shaft 3 is continuously rotated by 360°, or rotated in the reverse direction to 0°, under the action of the elastic force of the rotating shaft spring 33, the limiting column 14 will be inserted into the limiting groove 32 again, and the rotating shaft 3 will move upward as a whole, thereby disconnecting the electrical signal of the PCB.

[0029] In this embodiment, in order to achieve the damping effect when the rotating shaft 3 rotates, an elastic damping sheet 5 is arranged in the housing 1. Specifically, the elastic damping sheet 5 is fixedly arranged above the PCB, and a mounting component of the elastic damping sheet 5 is arranged in the housing 1. Both ends of the elastic damping sheet 5 are fixedly clamped on the mounting component in the housing 1, and its height is not higher than the height of the conductive spring 21; a protrusion 51 is vertically arranged at the relative middle part of the elastic damping sheet 5, and a groove 34 matching the protrusion 51 is arranged on the side of the cylindrical section with a smaller outer diameter of the rotating terminal 31. When the limiting column 14 and the limiting groove 32 are plugged into or correspond to each other, the protrusion 51 is in the In the groove 34, that is, when the rotating shaft 3 moves up or down, although there is a vertical relative displacement between the rotating terminal 31 and the elastic damping plate 5, the protrusion 51 is always located in the groove 34, and when the protrusion 51 is located in the groove 34, the elastic force applied by the elastic damping plate 5 to the side of the rotating terminal 31 is relatively small or there is no elastic force, so it does not affect the up and down movement of the rotating shaft 3; when the rotating shaft 3 is pressed downward to make the limiting column 14 disengage from the limiting groove 32 and then the rotating shaft 3 is rotated, the protrusion 51 of the elastic damping plate 5 and the side of the rotating terminal 31 will elastically resist each other, thereby bringing about a damping effect during the rotation process.

[0030] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A rotary telescopic conduction switch for a PCB, characterized in that, It comprises a housing, a PCB, a conductive metal sheet and a rotating shaft, wherein the PCB is fixedly arranged at the bottom of the inner cavity of the housing, and at least two conductive springs are arranged on the upper surface of the PCB; The rotating shaft is rotatably inserted into the housing, and its upper end passes through the top surface of the housing; a rotating terminal is fixedly sleeved on the rotating shaft, a plurality of limiting grooves are opened on the upper end surface of the rotating terminal, and a plurality of limiting columns matching the limiting grooves are arranged on the top of the inner cavity of the housing; a rotating shaft spring is connected between the rotating shaft and the PCB; The conductive metal sheet is linked with the rotating shaft in the vertical direction, so that when the rotating shaft moves downward until the limiting column is separated from the limiting groove, the conductive metal sheet abuts against the conductive spring; The rotating terminal is in a step shape, the conductive metal sheet is provided with a through hole whose size matches the size of a section with a smaller outer diameter of the rotating terminal, the section with a smaller outer diameter of the rotating terminal is inserted into the through hole, and the step surface of the rotating terminal is in contact with the conductive metal sheet; the inner cavity of the shell is provided with two guide columns in the vertical direction, the conductive metal sheet can move up and down along the guide columns, and a conductive metal sheet damping spring is sleeved on the guide columns, and the two ends of the conductive metal sheet damping spring are respectively in contact with the lower surface of the conductive metal sheet and the bottom surface of the inner cavity of the shell; An elastic damping sheet is arranged in the shell, and the elastic damping sheet elastically contacts the side surface of the rotating terminal.

2. The rotary telescopic conduction switch of a PCB according to claim 1, characterized in that A protrusion is provided in the middle of the elastic damping sheet, and a groove matching the protrusion is provided on the side of the rotating terminal. When the limiting groove corresponds to the limiting column, the protrusion is located in the groove.

3. The rotary telescopic conduction switch of a PCB according to claim 1, wherein, An external circuit interface is arranged on the back of the PCB.

4. The rotary telescopic conduction switch of a PCB according to claim 3, wherein, The housing comprises a shell and a back cover, wherein the shell is a slot body with an opening at the bottom, and the back cover is covered on the bottom of the shell.

5. The rotary telescopic conduction switch of a PCB according to claim 4, wherein The rear cover is provided with an opening for the external line interface to pass through.

6. The rotary telescopic conduction switch of a PCB according to claim 1, wherein A knob is fixedly arranged on the top of the rotating shaft.

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