CN220711705U

CN220711705U - Circuit board

Info

Publication number: CN220711705U
Application number: CN202322103980.5U
Authority: CN
Inventors: 周国华; 曾贺; 高瑜
Original assignee: Zhongshan Junchuang Electronic Technology Co ltd
Current assignee: Zhongshan Junchuang Electronic Technology Co ltd
Priority date: 2023-08-04
Filing date: 2023-08-04
Publication date: 2024-04-02
Anticipated expiration: 2033-08-04

Abstract

The application relates to a circuit board, comprising: a plate main body; a single-sided copper foil circuit layer disposed on the board body; the control module is attached to the single-sided copper foil circuit layer; the capacitor key is electrically connected with the single-sided copper foil circuit layer and is used for forming a coupling capacitor with an approaching human body; the display module is electrically connected with the single-sided copper foil circuit layer and comprises a multi-bit nixie tube formed by attaching a plurality of LEDs to the single-sided copper foil circuit layer and a shell which is covered on the multi-bit nixie tube and is connected with the plate main body. The manufacturing method can better meet the requirements of lighter and thinner circuit boards, meet the requirements of size and weight in specific scenes, and has lower manufacturing cost of a single panel and stronger reliability compared with the manufacturing cost of double panels and multi-layer boards.

Description

Circuit board

[ field of technology ]

The application relates to the technical field of electronic information, in particular to a circuit board.

[ background Art ]

A circuit board is a substrate structure widely used in electronic devices. In the manufacturing process of electronic products, circuit boards carry various electronic components and provide electrical connection, signal transmission, etc., and are generally made of insulating materials such as glass fiber reinforced resin (FR-4) or Polyimide (PI). The wire layer is formed by printing or depositing a conductive material, such as copper, by a circuit board process. The circuit board may be single-sided, double-sided, or multi-layered, depending on the requirements of the electronic device.

As electronic devices and electrical devices are increasingly thinned and highly integrated, there is an increasing demand for thin and lightweight circuit boards. These electronic or electrical devices require a thinner, lighter circuit board structure to meet product design and performance requirements, while conventional double-sided or multi-layer circuit boards have size and weight limitations in some specific scenarios.

In addition, the existing display module is mounted on the circuit board with a higher height, so that the designable range of the product volume is limited, and the requirement of the design trend of miniaturization of the product is difficult to meet. Therefore, in the place with a narrow structural space in the electrical equipment, the display control function is difficult to realize through the conventional PCB and the digital tube, and a plurality of inconveniences are brought to the miniaturized setting of the product. On the other hand, due to the strong competition of the market, if the production cost of the single PCB panel is reduced, the improvement of the product competitiveness is also urgent.

[ utility model ]

In order to solve the defects of the existing circuit board in light weight and high integration, the utility model provides a circuit board which enables equipment to use thinner and lighter circuit boards, reduces the production cost of a single PCB panel and improves the competitiveness of products.

The utility model provides the following scheme:

a circuit board, comprising:

a plate main body;

a single-sided copper foil circuit layer disposed on the board body;

the control module is attached to the single-sided copper foil circuit layer;

the capacitor key is electrically connected with the single-sided copper foil circuit layer and is used for forming a coupling capacitor with an approaching human body;

the display module is electrically connected with the single-sided copper foil circuit layer and comprises a multi-bit nixie tube formed by attaching a plurality of LEDs to the single-sided copper foil circuit layer and a shell which is covered on the multi-bit nixie tube and is connected with the plate main body.

According to the circuit board, the concave cavities corresponding to the LEDs one by one are formed in the side, close to the single-sided copper foil circuit layer, of the shell, the display panel is arranged on the side, away from the single-sided copper foil circuit layer, of the shell, and when the shell is connected with the board main body, the concave cavities are covered on the corresponding LEDs.

The circuit board is characterized in that each digit of the multi-digit nixie tube is respectively composed of 8 LEDs, and each digit of the multi-digit nixie tube comprises an A-LED, a B-LED, a C-LED, a D-LED, an E-LED, an F-LED, a G-LED and a DP-LED; wherein, the A-LED and the B-LED are a group, one end of the A-LED and the B-LED is connected with a segment code selection end SEG1, and the other end is connected with a bit code selection end DIG; the D-LEDs and the E-LEDs are a group, one end of each group of D-LEDs and one end of each group of E-LEDs are connected with a segment code selection end SEG2, and the other end of each group of D-LEDs and one end of each group of E-LEDs are connected with a bit code selection end DIG; the G-LEDs and the C-LEDs are a group, one end of each group of the G-LEDs and the C-LEDs is connected with a segment code selection end SEG3, and the other end of each group of the G-LEDs and the C-LEDs is connected with a bit code selection end DIG; the F-LED and the DP-LED are a group, one end of the F-LED and one end of the DP-LED are connected with the segment code selection end SEG4, and the other end of the F-LED and the DP-LED are connected with the bit code selection end DIG.

In the circuit board, the surface of the display panel is provided with a frosted surface which can make the light emitted uniformly and softly.

According to the circuit board, the display panel is provided with the grooves which are arranged corresponding to the concave cavities.

According to the circuit board, the fixing holes are formed in the board main body, the fixing columns capable of being inserted into the fixing holes are arranged on the lower end face of the shell, and the shell is in plug-in fit with the fixing holes through the fixing columns and is connected with the board main body.

According to the circuit board, the capacitive key is electrically connected with the touch piece, and the touch piece at least comprises a spring or conductive cotton.

In one such circuit board, the capacitive key includes a spaced touch circuit.

In the circuit board, a plurality of touch pieces are arranged at intervals along the length direction of the board main body.

In the circuit board, the power module is inserted into the board main body at the side far away from the single-sided copper foil circuit layer.

Compared with the prior art, the utility model has the following beneficial effects:

according to the embodiment of the utility model, the control module, the capacitor keys and the display module are arranged on the single-sided copper foil circuit layer, the multi-position nixie tube formed by attaching the LEDs on the single-sided copper foil circuit layer is covered with the shell, so that the low-height nixie tube is formed, the requirements of lighter and thinner circuit boards can be better met, the requirements of size and weight in specific scenes are met, the manufacturing cost of a single panel is lower than that of a double-panel and multi-layer board, and the reliability is higher.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a circuit board with a single-sided copper foil circuit layer hidden;

FIG. 2 is a schematic perspective view of a circuit board with a hidden single-sided copper foil circuit layer according to an embodiment of the utility model;

FIG. 3 is an exploded view of a circuit board according to an embodiment of the present utility model after concealing a single-sided copper foil circuit layer;

fig. 4 is a perspective view of the housing of fig. 1;

FIG. 5 is a schematic bottom view of the housing of FIG. 1;

FIG. 6 is a schematic diagram of a circuit board according to an embodiment of the present utility model;

fig. 7 is a schematic diagram of the multi-bit nixie tube circuit of fig. 3.

[ detailed description ] of the utility model

Referring to fig. 1 to 7, the present embodiment provides a circuit board, which includes:

a plate main body 6;

a single-sided copper foil circuit layer 1 provided on the board main body 6;

in the embodiment, the circuits for connecting the electronic elements are arranged on the same layer on the same board surface, and the copper foil is used for connection, so that the circuit connection is stable and reliable.

The control module 2 is attached to the single-sided copper foil circuit layer 1;

the control module of the embodiment is preferably a singlechip with a model of TM52F8276T/SOP20, and is used for controlling the stability of a circuit, so that after receiving a touch signal of a capacitive case, the control module can relatively quickly process the signal and output a corresponding control signal to control the display module to work.

As a preferred solution, but not particularly limited, the control module 2 comprises a touch IC.

The capacitive key 3 is electrically connected with the single-sided copper foil circuit layer 1 and is used for forming a coupling capacitor with an approaching human body to generate a control signal, and the control module 2 is used for detecting the capacitance value change of the coupling capacitor and converting the capacitance value change into an electric signal;

according to the embodiment, the capacitor key 3 is arranged, high sensitivity and design flexibility are achieved, the capacitor key 3 can be subjected to sealing design, so that external substances such as dust and moisture are prevented from entering the key, the life waterproof and dust-resistant performances of the key are improved, the reliability of a product is enhanced, the capacitor key 3 has no physical structure in a mechanical key, and the problem of partial mechanical abrasion is solved. The capacitor key has longer service life due to no physical contact, and simultaneously, faults caused by key abrasion are reduced.

As a preferred solution, but not particularly limited, the capacitive key 3 is electrically connected to a touch member 31, and the touch member 31 includes at least a spring or conductive cotton.

According to the embodiment, the touch piece 31 is electrically connected to the capacitive key 3 to form a key convenient to touch, touch control is performed on the touch piece 31, the physical surface of the circuit board is not required to be directly contacted, a user only needs to approach a finger or other objects to the touch piece 31 to trigger operation, signals are collected through springs or conductive cotton, and touch behaviors of the user can be stably and reliably detected.

As a preferred solution, but not particularly limited, the capacitive key 3 comprises a spaced touch circuit.

In this embodiment, the control module 2 includes a touch IC, in the use process of the separate touch circuit, a coupling capacitance is formed between a finger and the corresponding separate touch circuit, the separate touch circuit is also referred to as a separate touch switch, and the touch IC accurately calculates a specific separate touch circuit by detecting a capacitance change of the separate touch circuit, so as to execute a corresponding operation, and the separate touch circuit has an unlimited shape and can be flexibly designed according to actual requirements, only by having enough copper foil density, and too small copper foil density can affect the sensitivity of separate touch.

As a preferable scheme, but not particularly limited, the spaced touch switch is provided in the shape of an annular thread.

According to the embodiment, the capacitor key 3 can be in a filled state, and is manufactured into an annular thread shape when a circuit diagram is drawn, so that the structure is simple and novel, a touch spring is not required to be arranged, a blank touch switch made of copper foil is utilized to simulate and replace the touch spring, fingers do not need to contact a circuit board during control, the fingers can be used for controlling operation at a blank position, the control operation is simple, convenient and quick, and the use experience of a user is good; the structure of the touch spring is saved, the structure is simplified, the problems of low sensitivity and low stability caused by deformation, inclination and displacement of the touch spring are avoided, the production and processing procedures are simplified, raw materials are saved, the production cost is effectively reduced, the simple structure is changed, the common problem can be solved while the cost is saved, the control circuit structure is durable, the service life of the control circuit structure is effectively prolonged, and the practicability and the creativity are strong.

As a preferable embodiment, but not particularly limited thereto, the number of the touching pieces 31 is plural, and the touching pieces 31 are distributed at intervals along the length direction of the plate main body 6.

In order to form a plurality of control modes, the present embodiment can realize control of different functions by providing a plurality of touch members 31 on the board main body 1, thereby achieving control effects required by users.

The display module 4 is electrically connected with the single-sided copper foil circuit layer 1, and the display module 4 comprises a multi-position nixie tube 41 formed by attaching a plurality of LEDs to the single-sided copper foil circuit layer 1, and a shell 42 covered on the LEDs and fixedly connected with the board main body 6.

The display module 4 of this embodiment is through pasting the corresponding LED lamp pearl of putting at single face copper foil circuit layer 1 to constitute the digital tube shape, the rethread is covered in the charactron top and is equipped with casing 42, in order to form the effect of spotlight, makes the demonstration of digital tube more clear, and the thickness of casing 42 compares in the charactron that encapsulates, can become thinner, lighter.

As a preferred embodiment, but not particularly limited thereto, each digit of the multi-digit nixie tube 41 is composed of 8 LEDs.

According to the embodiment, 8 LED lamp beads are combined, the lamp beads are arranged clockwise by taking the top transverse line as an initial A-LED, the middle transverse line is G-LED, a nixie tube structure is formed, lamp groups are grouped, a plurality of nixie tubes are grouped in pairs, and finally parallel control is performed, so that the LED combination displays values of 0 ≡9 and the like.

As a preferred solution, but not particularly limited, a cavity 422 corresponding to the LEDs is provided on a side of the housing 42 close to the single-sided copper foil circuit layer 1, a display panel 421 is provided on a side of the housing 42 away from the single-sided copper foil circuit layer 1, when the housing 42 is connected to the board main body 6, the cavity 422 is covered on the corresponding LEDs, and when the corresponding LEDs emit light, the light passes through the cavity 422 and is displayed on the display panel 421, so as to generate corresponding display contents.

In order to ensure that the nixie tube formed by the LED can normally display numerical values, the LED upper cover is provided with the housing, so that the LED can display according to the position of the hollow matrix on the housing, the position of the hollow matrix wants to accurately emit light, and the housing is required to be provided with the corresponding concave cavity 422, so that light can pass through the concave cavity 422, and the display panel 421 correspondingly emits light.

As a preferable embodiment, but not particularly limited, the surface of the display panel 421 is a frosted surface which can make the light emitted uniformly and softly.

In order to enable the displayed numerical value to be more clearly visible, the display panel of the shell is provided with the frosted surface at the position of the matrix, and the position is the transparent film, so that the display effect is clearer, and the user experience is better.

As a preferred solution, but not particularly limited, the display panel 421 is provided with a groove 4221 corresponding to the cavity 422 for focusing light, so that the displayed numerals are clearer.

As a preferred embodiment, but not particularly limited thereto, each digit of the multi-digit nixie tube 41 includes an A-LED, a B-LED, a C-LED, a D-LED, an E-LED, an F-LED, a G-LED, and a DP-LED; wherein, the A-LED and the B-LED are a group, one end of the A-LED and the B-LED is connected with a segment code selection end SEG1, and the other end is connected with a bit code selection end DIG; the D-LEDs and the E-LEDs are a group, one end of each group of D-LEDs and one end of each group of E-LEDs are connected with a segment code selection end SEG2, and the other end of each group of D-LEDs and one end of each group of E-LEDs are connected with a bit code selection end DIG; the G-LEDs and the C-LEDs are a group, one end of each group of the G-LEDs and the C-LEDs is connected with a segment code selection end SEG3, and the other end of each group of the G-LEDs and the C-LEDs is connected with a bit code selection end DIG; the F-LED and the DP-LED are a group, one end of the F-LED and one end of the DP-LED are connected with the segment code selection end SEG4, and the other end of the F-LED and the DP-LED are connected with the bit code selection end DIG.

In the prior art, a plurality of small household appliances generally realize a digital display function through a nixie tube in a PCB, and the nixie tube is a display device which is in an 8 shape or other specific shapes and is formed by packaging a plurality of LED chips together. On the one hand, each LED chip is externally LED out of one pin, and in addition, the nixie tube is further provided with 1 pin of a common end, so that the number of pins of the existing nixie tube is more, the structure is more complicated, and the complexity of a processing procedure is improved. The LED is convenient to mount and easy to drive, so that the LED is very suitable for being mounted on a PCB to replace a traditional multi-section nixie tube, but the traditional LED is driven to be driven by common negative and common positive, if at least 4 common positive+8 section pins, namely 12 pins, are required to be mounted on the PCB, wiring on a single-sided PCB becomes difficult, and therefore, the driving structure of the LED needs to be adjusted.

In the embodiment, 8 LED lamp beads are combined, the lamp beads are arranged clockwise by taking the top transverse line as an initial A-LED, the middle transverse line is G-LED, a nixie tube structure is formed, lamp groups are grouped, a plurality of nixie tubes are grouped in pairs, and finally parallel control is performed, so that the LED combination displays values of 0-9 and the like.

As a preferable solution, but not particularly limited, the plate main body 6 is provided with a fixing hole 5, a fixing post 423 capable of being inserted into the fixing hole 5 is provided at a lower end surface of the housing 42, and the housing 42 is connected with the plate main body 6 through the fixing post 423 and the fixing hole 5 in a plug-in fit.

According to the embodiment, the fixing holes 5 are formed in the circuit board and used for fixing the fixing columns 423 in a plugging manner, the shell is fixed to the circuit board, so that the shell and the LED lamp form a complete nixie tube structure, and the formed nixie tube can meet the requirements of light and thin design.

As a preferable embodiment, but not particularly limited thereto, the board main body 6 is provided with a power module inserted at a side away from the single-sided copper foil circuit layer 1.

In order to ensure that the power supply of the board is more stable, and the power supply can be integrated on the board, the power supply module (not shown in the figure) is added in the embodiment, the power supply module at least comprises a rectifying circuit, a filtering circuit or a transforming circuit, the rectifying circuit further comprises a circuit element for front-stage protection, the circuit element comprises a piezoresistor and the like, the plug connector can better meet the running environment of high current, the flexibility, the reliability, the space saving, the easiness in manufacturing and installation, the interchangeability and the compatibility are stronger, the requirement of modern electronic equipment on power supply management can be met, and convenient maintenance and upgrading modes are provided.

The above description of one embodiment provided in connection with a particular disclosure is not intended to limit the practice of this application to that particular disclosure. Any approximation, or substitution of techniques for the methods, structures, etc. of the present application or for the purposes of making a number of technological deductions or substitutions based on the concepts of the present application should be considered as the scope of protection of the present application.

Claims

1. A circuit board, comprising:

a plate main body (6);

a single-sided copper foil circuit layer (1) provided on the board main body (6);

the control module (2) is attached to the single-sided copper foil circuit layer (1);

the capacitor key (3) is electrically connected with the single-sided copper foil circuit layer (1) and is used for forming a coupling capacitor with a nearby human body;

the display module (4) is electrically connected with the single-sided copper foil circuit layer (1), and the display module (4) comprises a multi-position nixie tube (41) formed by attaching a plurality of LEDs to the single-sided copper foil circuit layer (1), and a shell (42) which is covered on the multi-position nixie tube (41) and is connected with the plate main body (6).

2. A circuit board according to claim 1, wherein a concave cavity (422) corresponding to the LEDs is arranged on one side of the housing (42) close to the single-sided copper foil circuit layer (1), a display panel (421) is arranged on one side of the housing (42) away from the single-sided copper foil circuit layer (1), and the concave cavity (422) is covered on the corresponding LEDs when the housing (42) is connected with the board main body (6).

3. A circuit board according to claim 1, wherein each digit of said multi-digit nixie tube (41) is composed of 8 said LEDs, respectively, and each digit of said multi-digit nixie tube (41) comprises an a-LED, a B-LED, a C-LED, a D-LED, an E-LED, an F-LED, a G-LED and a DP-LED; wherein, the A-LED and the B-LED are a group, one end of the A-LED and the B-LED is connected with a segment code selection end SEG1, and the other end is connected with a bit code selection end DIG; the D-LEDs and the E-LEDs are a group, one end of each group of D-LEDs and one end of each group of E-LEDs are connected with a segment code selection end SEG2, and the other end of each group of D-LEDs and one end of each group of E-LEDs are connected with a bit code selection end DIG; the G-LEDs and the C-LEDs are a group, one end of each group of the G-LEDs and the C-LEDs is connected with a segment code selection end SEG3, and the other end of each group of the G-LEDs and the C-LEDs is connected with a bit code selection end DIG; the F-LED and the DP-LED are a group, one end of the F-LED and one end of the DP-LED are connected with the segment code selection end SEG4, and the other end of the F-LED and the DP-LED are connected with the bit code selection end DIG.

4. A circuit board according to claim 2, characterized in that the surface of the display panel (421) is provided with a frosted surface for making the light exit uniform and soft.

5. A circuit board according to claim 2, characterized in that the display panel (421) is provided with recesses (4221) arranged in correspondence with the cavities (422).

6. A circuit board according to claim 2, wherein the board main body (6) is provided with a fixing hole (5), the lower end surface of the housing (42) is provided with a fixing column (423) capable of being inserted into the fixing hole (5), and the housing (42) is connected with the board main body (6) through the fixing column (423) and the fixing hole (5) in a plugging fit.

7. A circuit board according to claim 1, characterized in that the capacitive key (3) is electrically connected to a touching member (31), the touching member (31) comprising at least a spring or conductive cotton.

8. A circuit board according to claim 1, characterized in that the capacitive key (3) comprises a spaced apart touch circuit.

9. A circuit board according to claim 7, wherein a plurality of said touching pieces (31) are provided, and a plurality of said touching pieces (31) are arranged at intervals along the length direction of the board main body (6).

10. A circuit board according to claim 1, characterized in that the board body (6) is provided with a power supply module inserted at a side remote from the single-sided copper foil circuit layer (1).