CN210808102U

CN210808102U - Circuit board insulation structure and endoscope camera

Info

Publication number: CN210808102U
Application number: CN201921434002.6U
Authority: CN
Inventors: 郭毅军; 刘中华
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-19
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a circuit board insulation system and endoscope camera, circuit board insulation system include casing, supporting seat, switch circuit board and insulating boot. The supporting seat is arranged in the shell. The switch circuit board is arranged in the shell and is arranged on the supporting seat. The insulating cover covers the switch circuit board. The circuit board insulation structure is characterized in that an insulation cover arranged outside the switch circuit board is additionally arranged between the switch circuit board and the inner side wall of the shell, the insulation cover can increase the creepage distance from the shell to the switch circuit board, the interval between the switch circuit board and the shell can be reduced to a certain degree, and the product volume and size are reduced while the safety is ensured.

Description

Circuit board insulation structure and endoscope camera

Technical Field

The utility model relates to an endoscope technical field especially relates to a circuit board insulation system and endoscope camera.

Background

The endoscope camera, as the application end needs withstand voltage 4000V, and the radiation and noise immunity need to meet the standard requirements. The endoscope camera comprises a shell and a switch circuit board arranged in the shell. The switch circuit board needs to be subjected to shielding grounding treatment. In the process of carrying out withstand voltage 4000V test on the shell, in order to avoid damaging a product by electric arcs generated when the distance between the shell and the switch circuit board is too small, a safe creepage distance of more than 4mm is generally required to be ensured between the inner wall of the shell and the switch circuit board, so that the volume size of the product is overlarge.

Disclosure of Invention

Accordingly, there is a need to overcome the drawbacks of the prior art and to provide a circuit board insulation structure and an endoscope camera head, which can ensure safety and reduce the size of the product.

The technical scheme is as follows: a circuit board insulation structure comprising: a housing; the supporting seat is arranged in the shell; the switch circuit board is arranged in the shell and is arranged on the supporting seat; and the insulating cover is covered on the switch circuit board.

According to the circuit board insulation structure, the insulation cover arranged outside the switch circuit board is additionally arranged between the switch circuit board and the inner side wall of the shell, and the insulation cover can realize that the creepage distance between the switch circuit board and the inner side wall of the shell is more than 4mm, so that the safe creepage distance when the voltage-withstanding test of 4000V is carried out on the shell can be achieved, the voltage breakdown phenomenon generated in the voltage-withstanding test can be avoided, and the product safety is improved. Because the creepage distance between the shell and the switch circuit board is increased by the insulating cover, the interval between the switch circuit board and the shell is reduced to a certain extent on the premise of ensuring the safety, and then the volume size of the product is reduced while the safety is ensured.

In one embodiment, the circuit board insulation structure further includes a connector, and the connector connects the insulation cover, the switch circuit board, and the support base.

In one embodiment, the number of the connecting pieces is more than two; the connecting piece is an insulating connecting piece.

In one embodiment, the inner surface of the insulating cover is matched with the surface of the switch circuit board, which faces away from the supporting seat; a gap is formed between the outer side wall of the insulating cover and the inner side wall of the shell; the shell is a metal shell.

In one embodiment, the circuit board insulation structure further comprises a key and a microswitch; the shell is provided with a through hole; the key is movably arranged in the through hole and is matched with the microswitch; the insulating cover is an elastic insulating cover; the micro switch is arranged on the switch circuit board.

In one embodiment, the key includes a pressing column and a skirt, the pressing column is movably disposed in the through hole, the skirt is connected to one end of the pressing column located outside the housing, the skirt is disposed around the pressing column in the circumferential direction, the skirt is in close contact with the outer side wall of the housing, a portion of the skirt in contact with the outer side wall of the housing is disposed around the periphery of the through hole, and the key is an elastic body.

In one embodiment, the outer side wall of the housing is formed with a groove disposed around the circumference of the through hole, the end of the skirt is fitted into the groove, and the end of the skirt is in close contact with the inner wall of the groove.

In one embodiment, the circuit board insulation structure further includes a pressing member, the pressing member is mounted on the housing, and the pressing member is configured to enable an end portion of the skirt to be in close contact with an outer sidewall of the housing.

In one embodiment, the pressing piece is a pressing plate, the skirt comprises an annular plate and an annular flange, one end of the annular plate is connected with the pressing column, the outer side wall of the other end of the annular plate is connected with the inner side wall of the annular flange, and the annular flange is tightly abutted with the outer side wall of the shell; the clamp plate is provided with an opening sleeved outside the skirt edge, the outer side wall of the annular plate is abutted to the side wall forming the opening, and the clamp plate is abutted to the annular flange.

In one embodiment, the outer side wall of the housing is formed with a groove provided around the circumference of the through hole, the annular flange is fitted into the groove, and the annular flange is in close contact with the inner wall of the groove.

In one embodiment, the pressing plate is fixedly arranged on the outer side wall of the shell through a mounting piece.

In one embodiment, a concave part matched with the pressure plate is arranged on the shell, and the pressure plate is arranged in the concave part; the pressing plate is fixedly arranged on the shell through more than two mounting pieces.

In one embodiment, the pressing column and the skirt are of an integrated structure, and the key is a silicon body.

The endoscope camera comprises the circuit board insulation structure, a lens and a cable, wherein the lens is arranged on the shell, one end of the cable is electrically connected with the switch circuit board, and the other end of the cable is electrically connected with an external host.

According to the endoscope camera, the insulating cover arranged outside the switch circuit board is additionally arranged between the switch circuit board and the inner side wall of the shell, and the insulating cover can realize that the creepage distance between the switch circuit board and the inner side wall of the shell is more than 4mm, so that the safe creepage distance when the 4000V voltage-withstanding test is carried out on the shell can be reached, the voltage breakdown phenomenon generated in the voltage-withstanding test can be avoided, and the product safety is improved. Because the creepage distance between the shell and the switch circuit board is increased by the insulating cover, the interval between the switch circuit board and the shell is reduced to a certain extent on the premise of ensuring the safety, and then the volume size of the product is reduced while the safety is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a circuit board insulation structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an endoscope camera according to an embodiment of the present invention;

fig. 3 is a schematic partial structural view of an endoscope camera according to an embodiment of the present invention.

Reference numerals:

10. a housing; 11. a through hole; 12. a groove; 13. a recess; 20. a supporting seat; 30. a switch circuit board; 31. a terminal; 40. an insulating cover; 50. a connecting member; 60. pressing a key; 61. pressing the column; 62. a skirt edge; 621. an annular plate; 622. an annular flange; 70. a compression member; 71. an opening; 72. a mounting member; 80. a microswitch; 90. a lens; 100. a cable.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

In one embodiment, referring to fig. 1 and 2, a circuit board insulation structure includes a housing 10, a supporting base 20, a switch circuit board 30 and an insulation cover 40. The support seat 20 is disposed in the housing 10. The support 20 is a plastic support 20 for insulation. The switch circuit board 30 is disposed in the housing 10, and the switch circuit board 30 is mounted on the support base 20. The insulating cover 40 covers the switch circuit board 30.

According to the circuit board insulation structure, the insulation cover 40 covering the switch circuit board 30 is additionally arranged between the switch circuit board 30 and the inner side wall of the shell 10, the creepage distance between the switch circuit board 30 and the inner side wall of the shell 10 can be more than 4mm through the insulation cover 40, so that the safe creepage distance of the shell 10 during a withstand voltage test of 4000V can be achieved, the galvanic breakdown phenomenon generated during the withstand voltage test can be avoided, and the product safety is improved. Because the creepage distance between the shell 10 and the switch circuit board 30 is increased by the insulating cover 40, the interval between the switch circuit board 30 and the shell 10 is reduced to a certain extent on the premise of ensuring the safety, and the volume size of the product is reduced while ensuring the safety.

In one embodiment, referring to fig. 1 and 2, the circuit board insulation structure further includes a connector 50. The connector 50 connects the insulating cover 40, the switch circuit board 30 and the support base 20. Thus, the insulation cover 40 and the switch circuit board 30 can be fixedly mounted on the supporting base 20.

Further, referring to fig. 1 and 2, the number of the connecting members 50 is two or more. The two or more connecting members 50 can firmly combine the insulating cover 40, the switch circuit board 30 and the supporting base 20. Furthermore, the connector 50 is an insulated connector 50. Specifically, the connection member 50 is an insulating screw, an insulating pin, or the like.

Further, referring to fig. 1 and fig. 2, the inner surface of the insulating cover 40 is matched with the surface of the switch circuit board 30 facing away from the supporting base 20. So, when playing insulating guard action, can reduce the device volume. In addition, the switch circuit board 30 can be driven to operate correspondingly well in the process of pressing the switch circuit board 30 by the key 60.

In addition, a gap is provided between the outer side wall of the insulating cover 40 and the inner side wall of the housing 10. The clearance can increase the safe creepage distance and improve the safety performance.

In one embodiment, the housing 10 is a metal housing 10. Specifically, the case 10 is an aluminum alloy case. Compared with a plastic shell, the metal shell 10 has better wear resistance, is more durable, has longer service life and can avoid the phenomenon of damage.

In one embodiment, referring to fig. 1 and 2, the circuit board insulation structure further includes a key 60 and a micro switch 80. The housing 10 is provided with a through hole 11. The key 60 is movably disposed in the through hole 11, and the key 60 is disposed in cooperation with the micro switch 80.

In one embodiment, referring to fig. 2 and 3, the key 60 includes a pressing post 61 and a skirt 62. Specifically, the pressing post 61 and the skirt 62 are integrally formed. Press post 61 movably set up in the through-hole 11, the shirt rim 62 with press post 61 to be located the outer one end of casing 10 links to each other, the shirt rim 62 winds press post 61's circumference sets up, the shirt rim 62 with the lateral wall in close contact with of casing 10, the shirt rim 62 with the position that the lateral wall of casing 10 contacted is around locating the periphery of through-hole 11, button 60 is the elastomer. Because the skirt 62 is in close contact with the outer side wall of the housing 10, and the portion of the skirt 62 in contact with the outer side wall of the housing 10 surrounds the periphery of the through hole 11, the skirt 62 can prevent water outside the housing 10 from entering the housing 10 through the through hole 11, and has a good sealing performance. In addition, the key 60 is an elastic body, and the pressing column 61 can move up and down in the through hole 11 when the key 60 is pressed, so that the function of the button can be realized. Compared with the traditional mode of adopting glue to be bonded and hermetically connected with the supporting shell 10, the assembling process can be simplified, the production efficiency and the yield can be improved, and the cost can be reduced.

Further, referring to fig. 2 and 3, a groove 12 disposed around the circumference of the through hole 11 is formed on an outer side wall of the housing 10. The end of the skirt 62 is fitted into the groove 12, and the end of the skirt 62 is in close contact with the inner wall of the groove 12. Specifically, the end of the skirt 62 is fixed to the outer side wall of the housing 10 by pressing with a pressing member 70, so that the end of the skirt 62 is in close contact with the outer side wall of the housing 10. Alternatively, the end of the skirt 62 may be snap-fit into the recess 12. On one hand, the end of the skirt 62 can play a good role in waterproofing when being in close contact with the inner wall of the groove 12; on the other hand, the end of the skirt 62 is disposed in the groove 12, so that the stability of the key 60 during pressing can be ensured.

In one embodiment, referring to fig. 2 and 3, the circuit board insulation structure further includes a pressing member 70. The pressing member 70 is mounted on the housing 10, and the pressing member 70 is used for tightly contacting the end of the skirt 62 with the outer side wall of the housing 10. As an alternative, the end of the skirt 62 may also be snap-fitted into the recess 12.

Further, referring to fig. 2 and 3, the pressing member 70 is a pressing plate, and the skirt 62 includes an annular plate 621 and an annular flange 622. One end of the annular plate 621 is connected to the pressing post 61, and the outer side wall of the other end of the annular plate 621 is connected to the inner side wall of the annular flange 622. The annular flange 622 is in close interference with the outer side wall of the housing 10. The clamp plate is provided with an opening 71 which is sleeved outside the skirt edge 62, the outer side wall of the annular plate 621 is abutted to the side wall forming the opening 71, and the clamp plate is abutted to the annular flange 622. Therefore, a first waterproof structure is formed between the pressing plate and the skirt 62, and a second waterproof structure is formed between the skirt 62 and the side wall of the shell 10, so that a good waterproof effect is achieved.

Further, referring to fig. 2 and 3, a groove 12 disposed around the circumference of the through hole 11 is formed on an outer side wall of the housing 10. The annular flange 622 is fitted into the groove 12, and the annular flange 622 is in close contact with the inner wall of the groove 12. Specifically, the annular flange 622, similar to an O-ring seal, is disposed in the groove 12 and provides good water resistance. In addition, during the pressing process of the key 60, the annular flange 622 is always clamped and fixed between the pressing plate and the shell 10 and is kept in a static state, so that the stability of the key 60 during the pressing process can be ensured.

Further, referring to fig. 2 and 3, the pressing plate is fixedly mounted on the outer side wall of the housing 10 by a mounting member 72. Specifically, the mounting members 72 are screws, bolts, pins, or the like. In order to improve the sealing performance of the housing 10, the mounting hole of the housing 10 for matching with the mounting member 72 is a blind hole, so that water outside the housing 10 can be prevented from entering the housing 10 through the mounting hole, and the sealing performance is ensured.

Further, referring to fig. 2 and 3, a concave portion 13 adapted to the pressing plate is disposed on the housing 10, and the pressing plate is disposed in the concave portion 13. Therefore, after the pressing plate is arranged in the concave part 13, the surface of the pressing plate is flush with the outer side wall of the shell 10, and the product performance is improved.

In one embodiment, referring to fig. 2 and 3, the pressure plate is fixedly mounted to the housing 10 by two or more mounting members 72. Thus, the pressing plate can be stably installed on the outer sidewall of the housing 10, so that the end portion of the skirt 62 is pressed against the outer sidewall of the housing 10.

Optionally, the key 60 is a silicone body, a rubber body, a PE body, a BOPP body, a PET body, or a PVC body. Wherein, PE is fully called polycarbonate in Chinese, PET is fully called polyethylene terephthalate in Chinese, and PE and PET both have the characteristics of high transparency, excellent insulating property and water insolubility at normal temperature. The BOPP is a biaxially oriented polypropylene film, and has the characteristics of high transparency, high glossiness, excellent coating adhesion, excellent water vapor and grease barrier properties and excellent insulation. PVC is polyvinyl chloride resin, and has good flexibility and excellent insulating and waterproof properties. The key 60 having elastic, waterproof and insulating properties can be manufactured using any one of the materials.

Further, the switch circuit board 30 is provided with a terminal 31, and the terminal 31 is electrically connected with the control main board through a conducting wire.

Further, referring to fig. 1 and 3, the endoscope camera further includes an insulating cover 40 disposed in the housing 10. The insulating cover 40 covers the switch circuit board 30 and is located between the switch circuit board 30 and the key 60.

Specifically, referring to fig. 1 and 3, the insulating cover 40 is an elastic insulating cover 40. Therefore, in the pressing process of the key 60, the microswitch 80 in the insulating cover 40 can be normally driven to act, and the pressing and triggering of the microswitch 80 by the key 60 cannot be influenced. Further, the insulating cover 40 conforms to the surface shape of the switch circuit board 30. Therefore, the microswitch 80 in the insulating cover 40 can be normally driven to act in the pressing process of the key 60, and the product performance is improved. Optionally, the insulating cover 40 is a silicone body, a rubber body, a PE body, a BOPP body, a PET body, or a PVC body.

In an embodiment, referring to fig. 1 and fig. 2, an endoscope camera includes the circuit board insulation structure of any one of the above embodiments, and further includes a lens 90 and a cable 100, the lens 90 is disposed on the housing 10, one end of the cable 100 is electrically connected to the switch circuit board 30, and the other end of the cable 100 is electrically connected to an external host.

According to the endoscope camera, the insulating cover 40 covering the switch circuit board 30 is additionally arranged between the switch circuit board 30 and the inner side wall of the shell 10, the creepage distance between the switch circuit board 30 and the inner side wall of the shell 10 can be more than 4mm through the insulating cover 40, so that the safe creepage distance when a 4000-volt withstand voltage test is carried out on the shell 10 can be achieved, the galvanic breakdown phenomenon generated in the withstand voltage test can be avoided, and the product safety is improved. Because the creepage distance between the shell 10 and the switch circuit board 30 is increased by the insulating cover 40, the interval between the switch circuit board 30 and the shell 10 is reduced to a certain extent on the premise of ensuring the safety, and the volume size of the product is reduced while ensuring the safety.

The tightness in the "close contact" of the above-described embodiment can be achieved without a gap in the contact surface between the two objects, thereby being able to play a role in waterproofing.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A circuit board insulation structure, comprising:

a housing;

the supporting seat is arranged in the shell;

the switch circuit board is arranged in the shell and is arranged on the supporting seat;

and the insulating cover is covered on the switch circuit board.

2. The circuit board insulation structure according to claim 1, further comprising a connector connecting the insulation cover, the switch circuit board and the support base.

3. The circuit board insulation structure according to claim 2, wherein the number of the connecting members is two or more; the connecting piece is an insulating connecting piece.

4. The circuit board insulation structure according to claim 1, wherein the inner surface of the insulation cover is matched with the surface of the switch circuit board, which faces away from the supporting base; a gap is formed between the outer side wall of the insulating cover and the inner side wall of the shell; the shell is a metal shell.

5. The circuit board insulation structure according to claim 1, further comprising a key and a micro switch; the shell is provided with a through hole; the key is movably arranged in the through hole and is matched with the microswitch; the insulating cover is an elastic insulating cover; the micro switch is arranged on the switch circuit board.

6. The circuit board insulation structure according to claim 5, wherein the key includes a pressing post and a skirt, the pressing post is movably disposed in the through hole, the skirt is connected to an end of the pressing post located outside the housing, the skirt is disposed around a circumference of the pressing post, the skirt is in close contact with an outer sidewall of the housing, a portion of the skirt in contact with the outer sidewall of the housing is disposed around a periphery of the through hole, and the key is an elastic body.

7. The circuit board insulation structure according to claim 6, wherein the outer side wall of the housing is formed with a groove provided around the circumference of the through hole, an end portion of the skirt is fitted into the groove, and the end portion of the skirt is in close contact with an inner wall of the groove.

8. The circuit board insulation structure according to claim 6, further comprising a pressing member mounted on the housing, the pressing member being configured to bring an end portion of the skirt into close contact with an outer sidewall of the housing.

9. The circuit board insulation structure according to claim 8, wherein the pressing member is a pressing plate, the skirt includes an annular plate and an annular flange, one end of the annular plate is connected to the pressing post, an outer side wall of the other end of the annular plate is connected to an inner side wall of the annular flange, and the annular flange is in tight contact with an outer side wall of the housing; the clamp plate is provided with an opening sleeved outside the skirt edge, the outer side wall of the annular plate is abutted to the side wall forming the opening, and the clamp plate is abutted to the annular flange.

10. An endoscope camera is characterized by comprising the circuit board insulation structure according to any one of claims 1 to 9, and further comprising a lens and a cable, wherein the lens is arranged on the shell, one end of the cable is electrically connected with the switch circuit board, and the other end of the cable is electrically connected with an external host.