CN216310460U - Writing board - Google Patents
Writing board Download PDFInfo
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- CN216310460U CN216310460U CN202122903519.9U CN202122903519U CN216310460U CN 216310460 U CN216310460 U CN 216310460U CN 202122903519 U CN202122903519 U CN 202122903519U CN 216310460 U CN216310460 U CN 216310460U
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- pcb
- circuit board
- mounting cavity
- shell
- board
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Abstract
The utility model discloses a writing board, which comprises a shell, a liquid crystal film, a PCB (printed circuit board) and a cover plate, wherein the liquid crystal film is arranged on the shell; the shell is provided with a first mounting cavity and a second mounting cavity; the liquid crystal film is arranged in a first installation cavity of the shell; the PCB circuit board is arranged in a second mounting cavity of the shell; the cover plate is arranged on the second mounting cavity in a covering mode and used for covering the PCB; the bottom surface of the PCB circuit board is in surface contact with the second mounting cavity; a limiting groove for positioning the position of the PCB is arranged in the second mounting cavity; the contact surface of the PCB circuit board and the second mounting cavity is enlarged, so that the stress area is enlarged, when the writing board is impacted, the unit area stress of the PCB circuit board can be effectively reduced, the damage of the PCB board is reduced, and the service life of the writing board is prolonged.
Description
Technical Field
The utility model relates to the field of writing boards, in particular to a writing board.
Background
At present, common board is the liquid crystal board, its structure mainly is by the casing, the apron, the liquid crystal membrane, parts such as circuit board and apron constitute, the circuit board sets up on the boss in the casing, and form the space between the casing, such structure after the board falls, the circuit board receives the condition of damage because of the deformation of apron and casing easily, the circuit board fixed through the fastener can be because of the fastener is not hard up takes place the displacement after the board is used for a long time simultaneously, and then the condition of contact failure appears, influence the life of board.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a writing board which can effectively protect a circuit board and has a better fixing effect on the circuit board.
The technical scheme adopted by the utility model is as follows: a tablet, comprising:
the device comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is provided with a first mounting cavity and a second mounting cavity;
a liquid crystal film installed in the first installation cavity of the housing;
the PCB circuit board is arranged in the second installation cavity of the shell;
the cover plate is covered on the second mounting cavity and used for covering the PCB;
electronic components and circuits of the PCB are positioned on one surface;
the PCB circuit board and the back separation surface of the PCB circuit board, which is provided with electronic components and circuits, form surface contact with the bottom surface of the second mounting cavity.
Furthermore, a positioning strip is arranged in the second mounting cavity, and the positioning strip can limit the mounting position of the circuit board.
Furthermore, the PCB circuit board and the second mounting cavity are fixed through screws.
Furthermore, a hole is formed in the PCB, and the PCB is connected with the second mounting cavity through the screw screwing hole.
Furthermore, a through hole is formed in the PCB, and a screw hole is formed in the position, corresponding to the hole of the PCB, of the second mounting cavity.
Furthermore, the printed circuit of the PCB circuit board is a double-capacitor circuit.
Compared with the prior art, the PCB circuit board and the second mounting cavity form surface contact, and a positioning strip is arranged in the second mounting cavity, the unit area stress of the surface of the PCB circuit board is reduced by increasing the contact surface of the PCB circuit board and the cavity, when the cover plate and the shell are deformed, the PCB circuit board is effectively protected, electronic components and circuits of the PCB circuit board are positioned on one surface, the PCB circuit board is provided with electronic components which are contacted with the second mounting cavity from the back surface of the circuit, therefore, the electronic components and the circuit are not subjected to frictional loss, the service life of the PCB is prolonged, meanwhile, the arranged positioning strip can reduce the position deviation of the PCB caused by the loosening of the fastening piece, the situation of poor circuit contact can be effectively reduced, and the service life of the writing board is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an overall block diagram of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the tablet of the present invention includes a housing 1, a liquid crystal film 2, a cover plate 3, and a PCB circuit board 4; the shell 1 is provided with a first mounting cavity 8 and a second mounting cavity 5; the liquid crystal film 2 is arranged in a first installation cavity 8 of the shell 1; the cover plate 3 is covered on the second mounting cavity 6 and used for covering the PCB 4; the PCB 4 is arranged in a second installation cavity 5 of the shell 1; the PCB circuit board 4 is a single-sided printed circuit board, the PCB circuit board set up the back of the body of electronic components and circuit from the face with 5 bottom surfaces of second installation cavity form the face contact, increased the lifting surface area of PCB circuit board 4 to it is right to reduce the board in the use because of the collision PCB circuit board 4's damage, simultaneously the PCB circuit board set up the back of the body of electronic components and circuit from the face with second installation cavity bottom surface face contact, it is right to have reduced because of the friction the loss that electronic components and circuit produced, and then prolonged the life of board.
In some embodiments, a limiting strip 7 is arranged in the second mounting cavity 5; the limiting strips 7 limit the installation position of the PCB circuit board 4, ensure the position stability of the circuit board, further ensure the connection stability of the relevant contact points of the circuit board, and reduce the faults caused by the looseness of the circuit board.
In some embodiments, the PCB 4 and the second cavity 5 are connected by screws.
In some embodiments, the PCB circuit board 4 is provided with a through hole 6, a threaded hole is formed at a position corresponding to the opening of the PCB circuit board 4 in the second mounting cavity 5, and a screw is screwed into the threaded hole through the hole of the PCB circuit board 4 and the hole of the second mounting cavity 5, so as to further increase the fixing strength of the PCB circuit board 4.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A tablet, comprising:
the device comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is provided with a first mounting cavity and a second mounting cavity;
a liquid crystal film installed in the first installation cavity of the housing;
the PCB circuit board is arranged in the second installation cavity of the shell;
the cover plate is covered on the second mounting cavity and used for covering the PCB
It is characterized in that the preparation method is characterized in that,
electronic components and circuits of the PCB are positioned on one surface;
the PCB circuit board is provided with an electronic component and a back separation surface of the circuit, and the back separation surface of the electronic component and the bottom surface of the second installation cavity form surface contact.
2. The tablet of claim 1, wherein a positioning bar is disposed in the second mounting cavity, and the positioning bar limits a mounting position of the PCB.
3. The tablet of claim 2, wherein the PCB board is connected to the second cavity by screws.
4. The tablet of claim 3, wherein the PCB circuit board has a through hole, and the second cavity has a screw hole at a position corresponding to the hole of the PCB circuit board.
5. A tablet according to claim 1, wherein the printed circuit of the PCB board is a dual capacitor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122903519.9U CN216310460U (en) | 2021-11-25 | 2021-11-25 | Writing board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122903519.9U CN216310460U (en) | 2021-11-25 | 2021-11-25 | Writing board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216310460U true CN216310460U (en) | 2022-04-15 |
Family
ID=81121529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122903519.9U Active CN216310460U (en) | 2021-11-25 | 2021-11-25 | Writing board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216310460U (en) |
-
2021
- 2021-11-25 CN CN202122903519.9U patent/CN216310460U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |