Composite circuit board for galvanometer motor and galvanometer motor

Abstract

The utility model relates to a composite circuit board for a galvanometer motor and the galvanometer motor, the composite circuit board comprises a circuit board body, and a photocell assembly and a light-emitting assembly which are respectively arranged on the circuit board body, the circuit board body comprises a flexible circuit board and a hard board which is at least partially tightly attached to the flexible circuit board into a whole; and the photocell assembly and the light-emitting assembly are respectively arranged on the flexible circuit board. According to the composite circuit board provided by the embodiment of the invention, the hard board is partially attached to the flexible circuit board to form the composite circuit board, the manufacturing process is simple, and the installation cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of galvanometer scanning technology, and in particular to a composite circuit board for a galvanometer motor and a galvanometer motor. Background Art

[0002] The galvanometer motor is the core component of the laser radar. During operation, the laser radar transmit end's light beam is manipulated by controlling the rotation of the lens connected to the output end of its shaft. The irradiation range of the light beam is related to the rotation angle of the galvanometer. In order to detect the rotation angle of the shaft in the galvanometer motor, a detection device is provided in the galvanometer motor. The detection device usually includes a photocell, a light source and a circuit board. When working, the detection device determines the rotation angle of the shaft by shielding the photocell or light source through a shielding component installed at the end of the shaft, such as the technical solution disclosed in the patent with publication number CN218387164U.

[0003] The circuit board in the detection device generally adopts PCB, but PCB is a hard board, and most of them adopt a flexible circuit board sandwiched in the middle of a double-layer hard board. It cannot be bent during the assembly process, and the circuit connection between adjacent circuit boards often relies on electrical connectors for electrical connection. This not only makes the manufacturing process of the circuit board more complicated, but also makes the installation process of the circuit board more cumbersome. The complicated installation process is not only prone to errors, but also has a high installation cost. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model proposes a composite circuit board for a galvanometer motor, which is formed by partially attaching a hard board to a flexible circuit board, making the assembly of the circuit board more flexible, thereby reducing assembly errors, increasing the reliability of the circuit board and reducing installation costs.

[0005] An embodiment of the present application proposes a composite circuit board for a galvanometer motor, comprising a circuit board body and a photocell assembly and a light-emitting assembly respectively arranged on the circuit board body, wherein the circuit board body comprises a flexible circuit board and a hard board that is at least partially tightly fitted to the flexible circuit board as a whole; the photocell assembly and the light-emitting assembly are respectively arranged on the flexible circuit board.

[0006] Optionally, the circuit board body includes at least a first circuit board and a second circuit board, the photovoltaic cell assembly is arranged on the first circuit board, the light-emitting assembly is arranged on the second circuit board, the first circuit board includes a first flexible circuit board and a first hard board which are tightly fitted together as a whole, the photovoltaic cell assembly is arranged on the outer surface of the first flexible circuit board, and the photovoltaic cell assembly is electrically connected to the circuit in the first flexible circuit board; and the second circuit board includes a second flexible circuit board and a second hard board which are tightly fitted together as a whole, the light-emitting assembly is arranged on the outer surface of the second flexible circuit board, and the light-emitting assembly is electrically connected to the circuit in the second flexible circuit board; wherein, the first flexible circuit board and the second flexible circuit board are electrically connected.

[0007] Optionally, it also includes: a third flexible circuit board, which is formed by extending the first flexible circuit board, and the third flexible circuit board includes an interface end, and the interface end includes a plurality of conductive contacts, and the interface end is used to electrically connect to an external device and transmit signals.

[0008] Optionally, the first circuit board and the second circuit board are spaced apart from each other, and a gap is formed therebetween.

[0009] Optionally, the first circuit board is a rectangular structure, and the second circuit board is an irregularly shaped structure. In a working state, the second circuit board and the first circuit board are arranged in relative positions to ensure that the light beams between the photovoltaic component and the light-emitting component are adapted to each other.

[0010] Optionally, the first circuit board and the second circuit board are electrically connected via PIN pins.

[0011] Optionally, the first flexible circuit board and the second flexible circuit board are electrically connected through a fourth flexible circuit board, and the fourth flexible circuit board is arranged in the gap between the first circuit board and the second circuit board. The first flexible circuit board, the second flexible circuit board and the fourth flexible circuit board are an integrally formed structure.

[0012] Optionally, the first circuit board also includes a first through hole, which is used to pass the end of the rotating shaft of the galvanometer motor, and the photocell assembly includes a first photocell, a second photocell, a third photocell and a fourth photocell, which are symmetrically arranged on both sides of the first through hole.

[0013] Optionally, the first circuit board and the second circuit board are an integrally formed structure.

[0014] Optionally, the first circuit board further includes a second through hole, the second through hole is used to pass the end of the rotating shaft of the galvanometer motor, and the photocell assembly and the light-emitting assembly are symmetrically arranged on both sides of the second through hole.

[0015] The embodiment of the present application also proposes a galvanometer motor, which at least includes a rotating shaft, a casing, a bearing seat and a bearing, wherein the rotating shaft is inserted into the inner cavity of the casing, the end of the rotating shaft is sleeved with a bearing, and the bearing seat is sleeved on the outside of the bearing. The galvanometer motor also includes the aforementioned composite circuit board, and the first circuit board of the composite circuit board is fixed on the end face of the bearing seat.

[0016] The composite circuit board for the galvanometer motor proposed in the embodiment of the present application includes a flexible circuit board, which is formed by partially attaching a hard board to the flexible circuit board. Compared with the PCB used in the prior art, it has the advantage of flexible installation. In addition, since the flexible circuit board can be bent, the connection between adjacent circuit boards can be achieved by bending the flexible circuit board. This not only reduces the use of electrical connectors, but also simplifies the installation steps, reduces the difficulty of installation, and improves installation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0018] Figure 1 It is a schematic diagram of the overall structure of a composite plate used for a galvanometer motor in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the structure of a composite plate used for a galvanometer motor in a working state according to an embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of another composite circuit board for a galvanometer motor according to an embodiment of the present application;

[0021] Figure 4 It is a structural schematic diagram of another composite circuit board for a galvanometer motor according to an embodiment of the present application;

[0022] Figure 5 is a structural schematic diagram of another composite circuit board for a galvanometer motor according to an embodiment of the present application;

[0023] Figure 6 is a structural schematic diagram of a galvanometer motor according to an embodiment of the present application;

[0024] Figure 7 yes Figure 6 The structure is shown in cross-section along AA.

[0025] Description of reference numerals:

[0026] 100, composite circuit board; 110, circuit board body; 112, flexible circuit board; 113, hard board; 101, photocell assembly; 102, light-emitting assembly; 103, first circuit board; 104, second circuit board; 1031, first flexible circuit board; 1032, first hard board; 1041, second flexible circuit board; 1042, second hard board; 105, third flexible circuit board; 106, fourth flexible circuit board; 107, first through hole; 1011, first photocell; 1012, second photocell; 1013, third photocell; 1014, fourth photocell; 301, second through hole; 400, galvanometer motor; 401, rotating shaft; 402, housing; 403, bearing; 405, bearing seat; 406, end cover; 407, sunshade. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the following detailed description, reference may be made to the various specification drawings that are part of the present application and are used to illustrate specific embodiments of the present application. In the accompanying drawings, similar reference numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described below in sufficient detail so that a person of ordinary skill in the art with relevant knowledge and skills in the art can implement the technical solutions of the present application. It should be understood that other embodiments may also be used or structural, logical or electrical changes may be made to the embodiments of the present application.

[0029] Figure 1 It is a schematic diagram of the overall structure of a composite plate used for a galvanometer motor according to an embodiment of the present application. Figure 2 Schematic diagram of the structure of a composite plate used for a galvanometer motor in an embodiment of the present application in a working state. Figure 1 and Figure 2 As shown, a composite circuit board 100 for a galvanometer motor proposed in an embodiment of the present application includes a circuit board body 110 and a photovoltaic cell assembly 101 and a light emitting assembly 102 respectively arranged on the circuit board body 110, and the circuit board body 110 includes a flexible circuit board 112 and a hard board 113 at least partially tightly attached to the flexible circuit board 112. The photovoltaic cell assembly 101 and the light emitting assembly 102 are respectively arranged on the flexible circuit board 112.

[0030] In some embodiments of the present application, optionally, the circuit board body 110 includes at least a first circuit board 103 and a second circuit board 104, the photovoltaic cell assembly 101 is disposed on the first circuit board 103, and the light emitting assembly 102 is disposed on the second circuit board 104. In some embodiments of the present application, optionally, the first circuit board 103 is a rectangular structure, and the second circuit board 104 is an irregularly shaped structure, and in the working state, the second circuit board 104 and the first circuit board 103 are located opposite to each other.

[0031] Further, the first circuit board 103 includes a first flexible circuit board 1031 and a first hard board 1032 that are closely attached to each other as one body, the photovoltaic cell assembly 101 is arranged on the outer surface of the first flexible circuit board 1031, and the circuits in the photovoltaic cell assembly 101 and the first flexible circuit board 1031 are electrically connected. And, the second circuit board 104 includes a second flexible circuit board 1041 and a second hard board 1042 that are closely attached to each other as one body, the light-emitting assembly 102 is arranged on the outer surface of the second flexible circuit board 1041, and the circuits in the light-emitting assembly 102 and the second flexible circuit board 1041 are electrically connected. Among them, the first flexible circuit board 1031 and the second flexible circuit board 1041 are electrically connected. In some embodiments of the present application, optionally, the first hard board and the second hard board are both PI reinforcement boards, FR4 reinforcement boards, steel sheet reinforcement boards, and are also reinforcement boards that need to be hardened for welding, wherein FR4 is a glass fiber reinforced epoxy resin substrate. The flexible circuit board and the hard board are fixed and bonded by adhesive. In some embodiments of the present application, optionally, the first flexible circuit board 1031 and the second flexible circuit board 1041 are also coated with an electromagnetic shielding film to prevent an external electromagnetic field from affecting the composite circuit board.

[0032] The composite circuit board for the galvanometer motor proposed in the embodiment of the present application includes a flexible circuit board, which is formed by partially attaching a hard board to the flexible circuit board. Compared with the PCB used in the prior art, it has the advantage of flexible installation. In addition, since the flexible circuit board can be bent, the connection between adjacent circuit boards can be achieved by bending the flexible circuit board. This not only reduces the use of electrical connectors, but also simplifies the installation steps, reduces the difficulty of installation, and improves installation reliability.

[0033] Continue to see Figure 1 and Figure 2As shown, the composite circuit board 100 for the galvanometer motor also includes a third flexible circuit board 105. The third flexible circuit board 105 is formed by extending the first flexible circuit board 1031. The third flexible circuit board 105 includes an interface end (not shown in the figure), and the interface end includes a plurality of conductive contacts. The interface end is used to electrically connect to an external device and transmit signals. The interface end is a "gold finger", and a hard board 113 is also provided on the back of the interface end to support the end of the flexible circuit board. In some embodiments of the present application, an electromagnetic shielding film is optionally coated on the third flexible circuit board 105 to prevent the external electromagnetic field from affecting the composite circuit board.

[0034] In the prior art, the first circuit board uses a PCB. In order to achieve the connection between the third flexible circuit and the PCB, the end of the third flexible circuit board needs to be inserted in the middle of the PCB. During the insertion process, the electrical connection point on the third flexible circuit needs to be aligned with the electrical connection point in the middle of the PCB, and then it needs to be packaged. The whole process is very complicated. In the embodiment of the present application, since the first flexible circuit board and the third flexible circuit board are an integrated structure, the third flexible circuit board is an extension structure of the first flexible circuit board. Compared with the prior art, it can significantly reduce the processing difficulty and improve the assembly efficiency of the composite circuit board on the galvanometer motor, thereby reducing the installation cost of the galvanometer motor and improving the installation efficiency.

[0035] Continue to see Figure 1 and Figure 2 As shown, the first circuit board 103 and the second circuit board 104 are arranged at an interval with a gap therebetween. The first flexible circuit board 1031 and the second flexible circuit board 1041 are electrically connected via the fourth flexible circuit board 106, which is arranged in the gap between the first circuit board 103 and the second circuit board 104. The first flexible circuit board 1031, the second flexible circuit board 1041 and the fourth flexible circuit board 106 are an integrally formed structure. In addition, the first circuit board 103 also includes a first through hole 107, and the end of the rotating shaft of the galvanometer motor is passed through the first through hole 107. The photovoltaic cell assembly 101 includes a first photovoltaic cell 1011, a second photovoltaic cell 1012, a third photovoltaic cell 1013 and a fourth photovoltaic cell 1014, which are symmetrically arranged on both sides of the first through hole 107.

[0036] The embodiment of the present application uses a fourth flexible circuit board to realize the electrical connection between the first circuit board and the second circuit board. The fourth flexible circuit board is an extension structure of the first flexible circuit board and / or the second flexible circuit board. When installing the circuit board in the galvanometer motor, it is only necessary to bend the fourth circuit board to install the composite circuit board at the target position in the galvanometer motor. The entire installation process is very simple. Compared with the previous technology that requires the use of electrical connectors for electrical connection during installation, it can not only improve the installation efficiency, but also improve the installation reliability.

[0037] Figure 3 FIG. 1 is a schematic diagram of the structure of another composite plate used for a galvanometer motor according to an embodiment of the present application. Figure 3 As shown, Figure 2 The difference between the illustrated embodiments is that the first circuit board is a circular structure as a whole, wherein the extension position of the fourth flexible circuit board can be any position of the circumference of the first circuit board. In addition, in order to enhance the strength of the third flexible circuit board, a hard board is added near the connection position between the third flexible circuit board and the first flexible circuit board.

[0038] In other embodiments of the present application, in addition to using the fourth flexible circuit board, the first circuit board and the second circuit board may also be electrically connected via PIN pins.

[0039] Figure 4 FIG. 1 is a schematic diagram of the structure of another composite circuit board for a galvanometer motor according to an embodiment of the present application. Figure 4 As shown, Figure 2 The difference between the illustrated embodiment is that the first circuit board 103 and the second circuit board 104 are integrally formed, and there is no spacing between the first circuit board 103 and the second circuit board 104. The first circuit board 103 is provided with a second through hole 301, and the end of the rotating shaft of the galvanometer motor is passed through the second through hole 301, and the photovoltaic cell assembly 101 and the light emitting assembly 102 are symmetrically arranged on both sides of the second through hole. Figure 5 FIG. 1 is a schematic diagram of the structure of another composite circuit board for a galvanometer motor according to an embodiment of the present application. Figure 5 As shown, Figure 4 The difference between the illustrated embodiments is that there are multiple photocells and light-emitting components. The number of photocells and light-emitting components can be designed according to actual needs, and this application does not limit this.

[0040] Figure 6 It is a structural schematic diagram of a galvanometer motor according to an embodiment of the present application. Figure 7 yes Figure 6 The structure shown is a cross-sectional view along AA. Figure 6 and Figure 7As shown, the galvanometer motor 400 at least includes a rotating shaft 401, a housing 402, a bearing 403 and a bearing seat 405. The rotating shaft 401 is inserted into the inner cavity of the housing 402, the end of the rotating shaft 401 is sleeved with the bearing 403, and the bearing seat 405 is sleeved on the outside of the bearing 403. In addition, the galvanometer motor 400 also includes a composite circuit board 100, and the first circuit board of the composite circuit board 100 is fixed on the end surface of the bearing seat 405. The second circuit board 104 is bent and installed in the groove on the end cover 406, so that the light-emitting component 102 faces the photovoltaic component 101. Since a light shielding plate 407 is provided on the rotating shaft 401, the rotating shaft 401 drives the light shielding plate 407 to shield the photovoltaic component 101 to achieve the measurement of the rotation angle of the rotating shaft 401.

[0041] In some embodiments of the present application, optionally, Figure 6 The structure of the galvanometer motor shown is different in that Figure 4 When the shown embodiment is installed on the galvanometer motor, the circuit board does not need to be bent, but a light reflecting mechanism needs to be set on the inner side of the end cover of the galvanometer motor. The light emitted by the light-emitting component reaches the photocell component after diffuse reflection by the light reflecting mechanism. When the baffle blocks the photocell, the photocell cannot receive the light signal. When the baffle blocks the light-emitting element, the photocell cannot receive the light signal either, thereby achieving the purpose of detecting the rotation angle of the shaft.

[0042] The first flexible circuit board, the second flexible circuit board, the third flexible circuit board and the fourth flexible circuit board in the composite circuit board for the galvanometer motor proposed in the embodiment of the present application are an integrated structure. During the manufacturing process of the composite circuit board, it is only necessary to stick a hard board on the back of the first flexible circuit board and the second flexible circuit board. The whole manufacturing process is very simple. Compared with the previous technology that requires inserting the flexible circuit board into the PCB and using PIN pins to connect the first circuit board and the second circuit board, it has obvious assembly and installation advantages, which can not only improve the installation efficiency, but also improve the installation reliability of the composite circuit board. Since auxiliary installation tools (such as PIN pin positioning tools) are saved, the installation cost can also be reduced.

[0043] The above embodiments are only used to illustrate the present application, and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A composite circuit board for a galvanometer motor, comprising a circuit board body and a photovoltaic cell assembly and a light emitting assembly respectively arranged on the circuit board body, characterized in that: The circuit board body comprises a flexible circuit board and a hard board which is at least partially tightly attached to the flexible circuit board as a whole; the photovoltaic cell assembly and the light emitting assembly are respectively arranged on the flexible circuit board.

2. The composite circuit board for a galvanometer motor according to claim 1, characterized in that: The circuit board body comprises at least a first circuit board and a second circuit board, the photovoltaic cell assembly is arranged on the first circuit board, the light emitting assembly is arranged on the second circuit board, the first circuit board comprises a first flexible circuit board and a first hard board which are closely attached to each other as a whole, the photovoltaic cell assembly is arranged on the outer surface of the first flexible circuit board, and the photovoltaic cell assembly is electrically connected to the circuit in the first flexible circuit board; and, The second circuit board includes a second flexible circuit board and a second hard board that are tightly attached to each other as a whole, the light-emitting component is arranged on the outer surface of the second flexible circuit board, and the light-emitting component is electrically connected to the circuit in the second flexible circuit board; Wherein, the first flexible circuit board and the second flexible circuit board are electrically connected.

3. The composite circuit board for a galvanometer motor according to claim 2, characterized in that: Also includes: The third flexible circuit board is formed by extending the first flexible circuit board. The third flexible circuit board includes an interface end, and the interface end includes a plurality of conductive contacts. The interface end is used to electrically connect to an external device and transmit signals.

4. The composite circuit board for a galvanometer motor according to claim 2, characterized in that: The first circuit board and the second circuit board are spaced apart from each other, and a gap is formed therebetween.

5. The composite circuit board for a galvanometer motor according to claim 4, characterized in that: The first circuit board is a rectangular structure, and the second circuit board is an irregularly shaped structure. In a working state, the second circuit board and the first circuit board are arranged in relative positions to ensure that the light beams between the photovoltaic component and the light-emitting component are adapted to each other.

6. The composite circuit board for a galvanometer motor according to claim 4, characterized in that: The first circuit board and the second circuit board are electrically connected via PIN pins.

7. The composite circuit board for a galvanometer motor according to claim 4, characterized in that: The first flexible circuit board and the second flexible circuit board are electrically connected via a fourth flexible circuit board, and the fourth flexible circuit board is arranged in the gap between the first circuit board and the second circuit board. The first flexible circuit board, the second flexible circuit board and the fourth flexible circuit board are an integrally formed structure.

8. The composite circuit board for a galvanometer motor according to claim 7, characterized in that: The first circuit board also includes a first through hole, which is used to pass the end of the rotating shaft of the galvanometer motor. The photocell assembly includes a first photocell, a second photocell, a third photocell and a fourth photocell, which are symmetrically arranged on both sides of the first through hole.

9. The composite circuit board for a galvanometer motor according to claim 2, characterized in that: The first circuit board and the second circuit board are integrally formed.

10. The composite circuit board for a galvanometer motor according to claim 9, characterized in that: The first circuit board also includes a second through hole, and the second through hole is used to pass the end of the rotating shaft of the galvanometer motor, and the photocell assembly and the light-emitting assembly are symmetrically arranged on both sides of the second through hole.

11. A galvanometer motor, comprising at least a rotating shaft, a housing, a bearing seat and a bearing, wherein the rotating shaft is inserted into the inner cavity of the housing, the end of the rotating shaft is sleeved with a bearing, and the bearing seat is sleeved on the outer side of the bearing, characterized in that: It also includes the composite circuit board according to any one of claims 1 to 10, wherein the first circuit board of the composite circuit board is fixed on the end surface of the bearing seat.

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