Positioning and mounting device for electronic component
By designing an electronic component positioning and installation device including a clamp and a lifting and adjustment support, the problem of stable installation and welding of electronic components on the circuit board is solved, and an efficient and stable welding process is achieved, which is suitable for components of various shapes.
Patent Information
- Application Number
- CN202421322915.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The prior art is difficult to achieve stable installation and welding of electronic components on circuit boards, especially when space is limited and manual operation is required, which can easily lead to inclination, bending or welding of the connector, affecting signal transmission and usage performance.
A positioning and mounting device for electronic components is designed, including a base, a clamp and a lifting and adjusting support. The clamping member clamps the electronic components through a spring clamp, and the lifting and lowering support realizes stable lifting of the electronic components through a spiral upward guide structure to ensure its stability in the position to be installed.
It realizes the stable installation and welding of electronic components on the circuit board, reduces operational difficulty and error, improves the stability and consistency of welding, can be completed by one person, and is suitable for most electronic components of different shapes.
Smart Images
Figure CN222764199U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit board welding, in particular to a positioning and installation device for electronic components. Background Art
[0002] Different types of circuit boards are used in today's electronic devices. Various components and connectors on the circuit boards play a core role. The welding operation of components on large quantities of circuit boards will be completed on professional machines, but there are also small quantities of circuit boards and components on test boards that may be manually operated. Manual operation has neither professional machines nor fixtures. Usually, operators will roughly complete it directly on the table, directly pressing the connector to weld. After welding, some are tilted or not welded firmly, and the connector may be crushed, which will affect signal transmission and performance. Severely unqualified ones can only be removed by tools and re-welded.
[0003] For example: when a processed circuit board needs to add connectors, components or fixing columns to the circuit board during the test, it needs to be manually welded. One operator needs to hold the connector with one hand to make the bottom surface press against the circuit board, and the other hand needs to press the circuit board to keep the two flat and close. Another operator uses welding tools to weld the connector to the circuit board. The operating space of most circuit boards is very limited, and it is still difficult for two people to operate at the same time. In addition, if the operator holds the hand for a long time, it will be numb and trembling. In addition, the connector and fixing column will heat up during high-temperature welding. Various reasons may cause the connector to shift, tilt, bend, etc. If only one welder can operate, then the connector or component can only be placed upside down on the table, the circuit board hole is aligned with the connector pin, and the two are pressed to weld. The connector placed in this way may not be flat, and other relatively high components or connectors on the circuit board will be crushed and worn.
[0004] There are various types of clamps on the market, such as manual clamps, pneumatic clamps, hydraulic clamps, mechatronic clamps, spring clamps, etc. Each type of clamp has its own advantages and disadvantages. Some clamps are complex, large, and heavy, and are not suitable for small mobile operating environments. Some clamps can only clamp cylinders or specific objects, and cannot be switched and installed at will, and are not interchangeable. Some can only clamp relatively small or relatively large products, and some are relatively cumbersome to install, disassemble, operate, and use. Therefore, the utility model came into being. Utility Model Content
[0005] In view of the above situation, the primary problem to be solved by the present invention is to provide an economical, practical, simple and convenient positioning and installation device for electronic components, which can be used to install electronic components on circuit boards with great adaptability.
[0006] To this end, the utility model provides a positioning and installation device for electronic components, which is characterized by comprising:
[0007] A base, wherein the top of the base has a mounting surface, the interior has a mounting cavity, the side has an adjustment socket, and the mounting surface also has a mounting hole; the mounting hole and the adjustment socket are connected to the mounting cavity;
[0008] At least two clamping members, the clamping members are mounted on the mounting surface, a clamping space for clamping electronic components is formed between the clamping members, and the clamping space is located above the mounting hole;
[0009] The lifting and adjusting support member comprises a lifting body and an adjusting body; the lifting body is installed in the installation cavity, the lifting part of the lifting body corresponds to the installation hole, and the adjusting body is located in the adjusting socket and is lifted and adjusted on the lifting body.
[0010] Preferably, the clamping member is a spring clamp, which includes a support, a torsion spring and a clamp arm, wherein the support is mounted on the mounting surface, the clamp arm is pivotally connected to the support, and the torsion spring is mounted at the pivotal joint between the clamp arm and the support.
[0011] Preferably, the clamp arm is mounted on the support via a pivot shaft; two mounting plates are provided on the support, and the bottom of the clamp arm is located between the two mounting plates and is pivotally connected through the pivot shaft through a through hole; the spring coil of the torsion spring is sleeved on the pivot shaft, and its two ends are respectively fixed to the clamp arm and the support.
[0012] Preferably, the clamp arm is provided with a guide rib, and the end of the torsion spring abuts against and guides the guide rib.
[0013] Preferably, a limiting assembly for preventing over-clamping of the clamping member is further provided on the side of the clamping arm and the support facing away from the torsion spring, and the limiting assembly includes two limiting bosses, which are respectively provided on the clamping arm and the support.
[0014] Preferably, a protective pad is provided on one side of the clamping member facing the clamping space.
[0015] Preferably, the lifting body comprises:
[0016] A rotating fulcrum, the rotating fulcrum is installed in the installation cavity;
[0017] A rotating inner cylinder, wherein the rotating inner cylinder is mounted on the rotating fulcrum, a first bevel gear is provided at the bottom of the rotating inner cylinder, and a guide groove is vertically provided on the cylinder wall of the rotating inner cylinder;
[0018] A lifting shaft, wherein the outer wall of the lifting shaft is provided with a guide protrusion, the lifting shaft is inserted into the rotating inner cylinder, and the guide protrusion is guided into the guide groove;
[0019] A rotating outer cylinder, the top of which is fixed to the mounting cavity, a top opening is provided at a position of the rotating outer cylinder corresponding to the mounting hole, the rotating outer cylinder is sleeved on the rotating inner cylinder, a lifting groove is provided on the cylinder wall of the rotating outer cylinder with a spiral upward direction, and the guide protrusion is also located in the lifting groove; the top of the lifting shaft extends to the mounting hole, and the lifting / lowering is achieved by the relative forward / reverse rotation of the rotating inner cylinder and the rotating outer cylinder.
[0020] Preferably, the regulating body includes:
[0021] a second bevel gear, the second bevel gear meshing with the first bevel gear;
[0022] an adjusting rod, one end of which is connected to the second bevel gear and the other end of which is located in the adjusting socket;
[0023] A knob is mounted on the adjusting rod and is at least partially located outside the adjusting socket.
[0024] Preferably, a non-slip pad is also provided at the bottom of the base.
[0025] Preferably, it further includes a support column for supporting a PCB board, the PCB board is fixed on the support column, the electronic components are clamped in the clamping space, and are lifted by the lifting and adjusting support member to the installation position of the electronic components on the PCB board.
[0026] The above technical solutions can be expressed alone or in combination to achieve the following beneficial effects:
[0027] In this solution, the electronic components are clamped by the clamping parts, and the electronic components are lifted by the lifting and adjusting support parts, so that the electronic components can be stably located in the installation position, and can be used in conjunction with the circuit board for soldering and other work. Only one person is needed to complete the work easily, and the process is stable and highly coordinated with the operator.
[0028] By using multiple spring clips and determining the quantity according to actual needs, it can meet the needs of most electronic components of different shapes. For example, when a four-sided connector needs to be installed, four spring clips can be selected to form a clamping space; when a cylindrical component needs to be installed, three spring clips can be selected to form a clamping space; when a slender component needs to be installed, two spring clips can be selected to clamp relative to each other.
[0029] A limit assembly is provided at the back of the clamp arm and the support to play a limit role, preventing the spring clamps from abutting against each other and preventing the spring clamps from being difficult to operate due to being attached to the mounting surface of the base, thereby satisfying the formation of a clamping space; the elasticity of the spring can be determined according to actual conditions, with a wide range of selectivity, and will not damage components; it has great advantages when used to clamp products that do not require high clamping accuracy and do not require particularly large clamping force.
[0030] The lifting and adjusting support adopts a spiral upward guide structure, which makes the lifting smooth, simple in structure, low in cost and economical. The material can be plastic, which is easy to shape, light, convenient, economical and practical. The base can be made of metal to make it more stable.
[0031] In combination with the use of support columns to support and fix the circuit board, this solution can stably perform welding and other tasks, and it is simple and convenient and can be completed by one person. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a structural schematic diagram of the utility model.
[0033] Figure 2 It is another structural schematic diagram of the utility model.
[0034] Figure 3 It is another structural schematic diagram of the utility model.
[0035] Figure 4 This is a comparison diagram of the bottom structure of the utility model.
[0036] Figure 5 It is an exploded view of the utility model.
[0037] Figure 6 It is a structural assembly diagram of the lifting main body in the utility model.
[0038] Figure 7 It is a comparison diagram of the spring clip of the utility model at different viewing angles.
[0039] Figure 8 It is a usage state diagram of the utility model.
[0040] Fig. 9 This is another usage state diagram of the utility model.
[0041] Fig.10 This is another usage state diagram of the utility model. DETAILED DESCRIPTION
[0042] The following description is given to enable those skilled in the art to implement and use the utility model and incorporate it into specific application contexts. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the utility model is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.
[0043] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.
[0044] The reader is reminded of all documents and literature filed simultaneously with this specification and open to public inspection, and the contents of all such documents and literature are incorporated herein by reference. Unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) can be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features.
[0045] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.
[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0047] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.
[0048] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.
[0049] Please refer to Figures 1 to 10 This embodiment describes a positioning and installation device for electronic components, and its structure includes a base 1, at least two clamping members 2, and a lifting and adjusting support member 3. Among them, the base 1 has a mounting surface 10 on the top, a mounting cavity 14 inside, an adjusting socket 120 on the side, and a mounting hole 100 on the mounting surface 10; the mounting hole 100 and the adjusting socket 120 are connected to the mounting cavity 14; the clamping member 2 is installed on the mounting surface 10, and a clamping space 20 for clamping the electronic component 6 is formed between the clamping members 2, and the clamping space 20 is located above the mounting hole 100; the lifting and adjusting support member 3 includes a lifting body and an adjusting body; the lifting body is installed in the mounting cavity 14, and the lifting part of the lifting body (later implemented as a top support 316) corresponds to the mounting hole 100, and the adjusting body is located in the adjusting socket 120 and is lifted and adjusted on the lifting body. The electronic component 6 is clamped by the clamping member 2, and the electronic component 6 is lifted by the lifting and adjusting support member 3, so that the electronic component 6 can be stably located at the installation position, and can be used in conjunction with the circuit board for soldering and other work. It can be easily completed by one person, and the process is stable and highly coordinated with the operator. Taking the X\Y\Z three-axis position posture of the electronic component 6 as a reference, the purpose of the clamping member 2 is to clamp the electronic component 6 to form a stable X\Y two-axis position. Its structure is not limited to one fixed form, and as a preferred implementation of this embodiment, the clamping member 2 is a spring clamp designed for this embodiment. Please combine Figure 5 and Figure 7 The spring clamp includes a support 21, a torsion spring 23 and a clamp arm 22, wherein the support 21 is installed on the mounting surface 10, the clamp arm 22 is pivotally connected to the support 21, and the torsion spring 23 is installed at the pivotal joint between the clamp arm 22 and the support 21.
[0050] Furthermore, the clamp arm 22 is mounted on the support 21 via a pivot shaft 212. Two mounting plates 211 are provided on the support 21. The bottom of the clamp arm 22 is located between the two mounting plates 211 and is pivotally connected via the through hole of the pivot shaft 212. The spring coil of the torsion spring 23 is sleeved on the pivot shaft 212, and its two ends are respectively fixed to the clamp arm 22 and the support 21.
[0051] Furthermore, the clamp arm 22 is provided with a guide rib 220, and the end of the torsion spring 23 is fixed on the guide rib 220. This can reduce friction and play a role in stable guidance and sliding.
[0052] For the convenience of operation, in the present embodiment, a limiting assembly is provided on the side of the clamping arm 22 and the support 21 facing away from the torsion spring 23 to prevent the clamping member 2 from being over-clamped. The limiting assembly includes two limiting bosses 23, which are respectively provided on the clamping arm 22 and the support 21. The limiting assembly can prevent the torsion spring 23 from being excessively deformed, which would cause the angle between the clamping arm 22 and the support 21 to be too large and difficult to control. The use of the limiting assembly allows the clamping arm 22 of the spring clamp to have a maximum limiting inclination angle, so that it does not stick to the base 1, and it is more convenient to clamp the electronic component 6. It should be noted that the number of the limiting boss 23 can also be one, which can be directly provided on the support 21 and fixed on the clamping arm 22.
[0053] The electronic component 6 is a vulnerable part. In order to protect it from being damaged, a protective pad 221 is provided on the side of the clamping member 2 facing the clamping space 20. The protective pad 221 is made of a silicone soft pad to prevent the electronic component 6 from being worn.
[0054] As mentioned above, the purpose of the clamping member 2 is to clamp the electronic component 6 to form stability in the X and Y axes, and the purpose of the lifting and adjusting support member 3 is to adjust the position on the Z axis. When the clamping member 2 clamps the electronic component 6, the lifting and adjusting support member 3 is used to lift the electronic component 6 to a suitable installation position.
[0055] For details, please combine Figure 5 and Figure 6The lifting body includes a rotating fulcrum 311, a rotating inner cylinder 315, a lifting shaft 314 and a rotating outer cylinder 313. Furthermore, the rotating fulcrum 311 is installed in the installation cavity 14, and the rotating inner cylinder 315 is installed on the rotating fulcrum 311 and has the ability to rotate along its own axis; a first bevel gear 312 is provided at the bottom of the rotating inner cylinder 315, and a guide groove 3150 is vertically provided on the wall of the rotating inner cylinder 315; a guide protrusion 3140 is provided on the outer wall of the lifting shaft 314, and the lifting shaft 314 is inserted into the rotating inner cylinder 315, and the guide protrusion 3140 is guided in the guide groove 3150; the top of the rotating outer cylinder 313 is fixed to the installation cavity 14 and a top opening is provided at a position corresponding to the installation hole 100, the rotating outer cylinder 313 is sleeved on the rotating inner cylinder 315, and a spiral upward lifting groove 3130 is provided on the wall of the rotating outer cylinder 313, and the guide protrusion 3140 is also located in the lifting groove 3130; the top of the lifting shaft 314 extends to the installation hole 100, and the lifting / lowering is achieved by the relative forward / reverse rotation of the rotating inner cylinder 315 and the rotating outer cylinder 313.
[0056] Similarly, the electronic component 6 is a vulnerable part. In order to protect it from being damaged, the lifting body also includes a top support 316. The top support 316 is arranged on the top of the lifting shaft 314 and is used to contact the electronic component 6. The top support 316 is preferably made of silicone material.
[0057] For further information, see Figure 4 and Figure 5 The adjusting body includes a second bevel gear 321, an adjusting rod 322 and a knob 323. Specifically, the second bevel gear 321 is meshed with the first bevel gear; one end of the adjusting rod 322 is connected to the second bevel gear 321, and the other end is located in the adjusting socket 120; the knob 323 is installed on the adjusting rod 322, and at least part of it is located outside the adjusting socket 120.
[0058] Furthermore, the support 21 adopts a round box-shaped structure, and a mounting cavity 14 is provided inside. The structure includes a top plate, a bottom plate 11 and a side panel 12. The adjustment socket 120 is provided on the side panel 12, and the mounting hole 100 is opened on the top plate.
[0059] The rotating fulcrum 311 of the lifting body is arranged on the bottom plate 11, and the rotating inner cylinder 315 is installed on the rotating fulcrum 311. The rotating fulcrum 311 can be a small bearing or a small cylinder, and the rotating inner cylinder 315 can be sleeved to complete the rotation. The rotating outer cylinder 313 is installed on the top plate, and the top opening of the rotating outer cylinder 313 corresponds to the position of the mounting hole 100.
[0060] In practice, the bottom of the base 1 is also provided with an anti-skid pad 111 to prevent sliding dislocation, which may cause the electronic component 6 to be misplaced during welding. The anti-skid pad 111 is not limited to a form, and a rubber pad can be used.
[0061] In order to cooperate with the fixation of the PCB board 4, a support column 5 is also provided to support the PCB board 4. The PCB board 4 is fixed on the support column 5, and the electronic components 6 are clamped in the clamping space 20. After being lifted to the installation position of the electronic components 6 on the PCB board 4 by the lifting and adjusting support member 3, the soldering work of the electronic components 6 can be completed by a single person.
[0062] This embodiment flexibly adopts multiple spring clips, and the number is determined according to actual needs, which can meet the needs of most electronic components 6 of different shapes; for example Figure 1 and Figure 8 When a four-sided connector needs to be installed, four spring clips can be selected to form a clamping space 20; Figure 3 and Fig.10 When cylindrical components need to be installed, three spring clips can be selected to form a clamping space 20; Figure 2 and Fig. 9 When slender components need to be installed, two spring clips can be selected to clamp them relative to each other.
[0063] Beneficial effects of this technical solution:
[0064] In this solution, the electronic component 6 is clamped by the clamping member 2, and the electronic component 6 is lifted by the lifting and adjusting support member 3, so that the electronic component 6 can be stably located at the installation position, and can be used in conjunction with the circuit board for soldering and other work. Only one person is needed to complete the work easily, and the process is stable and highly coordinated with the operator.
[0065] By using multiple spring clips and determining the number according to actual needs, most electronic components 6 of different shapes can be satisfied; for example, when a four-sided connector needs to be installed, four spring clips can be selected to form a clamping space 20; when a cylindrical component needs to be installed, three spring clips can be selected to form a clamping space 20; when a slender component needs to be installed, two spring clips can be selected for relative clamping.
[0066] A limit assembly is provided at the back of the clamp arm 22 and the support 21 to play a limit role, preventing the spring clamps from abutting against each other and preventing the spring clamps from being difficult to operate by fitting against the mounting surface 10 of the base 1, thereby satisfying the formation of the clamping space 20; the elasticity of the spring can be determined according to actual conditions, with a large degree of selectivity and without damaging components; it has great advantages when used to clamp products with low requirements on clamping accuracy and low clamping force.
[0067] The lifting and adjusting support 3 adopts a spiral upward guiding structure, which makes the lifting smooth, simple in structure, low in cost and economical. The material can be plastic, which is easy to shape, light, convenient, economical and practical. The base 1 can be made of metal to be placed more stably.
[0068] In combination with the support column 5 for supporting and fixing the circuit board, this solution can stably perform welding and other operations, and is simple and convenient and can be completed by one person.
[0069] A person skilled in the art can make various changes to the present invention according to the above description. Therefore, without violating the spirit of the claims of the present invention, some details in the embodiments shall not constitute a limitation on the present invention, and the present invention shall be protected within the scope defined by the attached claims.
Claims
1. A positioning and mounting device for electronic components, characterized in that: include: A base, wherein the top of the base has a mounting surface, the interior has a mounting cavity, the side has an adjustment socket, and the mounting surface also has a mounting hole; the mounting hole and the adjustment socket are connected to the mounting cavity; At least two clamping members, the clamping members are mounted on the mounting surface, a clamping space for clamping electronic components is formed between the clamping members, and the clamping space is located above the mounting hole; The lifting and adjusting support member comprises a lifting body and an adjusting body; the lifting body is installed in the installation cavity, the lifting part of the lifting body corresponds to the installation hole, and the adjusting body is located in the adjusting socket and is lifted and adjusted on the lifting body.
2. The positioning and mounting device for electronic components according to claim 1, characterized in that: The clamping member is a spring clamp, which includes a support, a torsion spring and a clamp arm. The support is installed on the installation surface, the clamp arm is pivotally connected to the support, and the torsion spring is installed at the pivotal connection between the clamp arm and the support.
3. The positioning and mounting device for electronic components according to claim 2, characterized in that: The clamp arm is mounted on the support via a pivot shaft; two mounting plates are provided on the support, and the bottom of the clamp arm is located between the two mounting plates and is pivotally connected via the pivot shaft through a through hole; the spring coil of the torsion spring is sleeved on the pivot shaft, and its two ends are respectively fixed to the clamp arm and the support.
4. The positioning and mounting device for electronic components according to claim 3, characterized in that: The clamp arm is provided with a guide rib, and the end of the torsion spring abuts against and guides the guide rib.
5. The positioning and mounting device for electronic components according to claim 2, characterized in that: A limiting assembly is also provided on the side of the clamping arm and the support facing away from the torsion spring to prevent the clamping member from over-clamping. The limiting assembly includes two limiting bosses, which are respectively provided on the clamping arm and the support.
6. The electronic component positioning and mounting device according to claim 1, characterized in that: A protection pad is provided on one side of the clamping piece facing the clamping space.
7. The positioning and mounting device for electronic components according to claim 1, characterized in that: The lifting body comprises: A rotating fulcrum, the rotating fulcrum is installed in the installation cavity; A rotating inner cylinder, wherein the rotating inner cylinder is mounted on the rotating fulcrum, a first bevel gear is provided at the bottom of the rotating inner cylinder, and a guide groove is vertically provided on the cylinder wall of the rotating inner cylinder; A lifting shaft, wherein the outer wall of the lifting shaft is provided with a guide protrusion, the lifting shaft is inserted into the rotating inner cylinder, and the guide protrusion is guided into the guide groove; A rotating outer cylinder, the top of which is fixed to the mounting cavity, a top opening is provided at a position of the rotating outer cylinder corresponding to the mounting hole, the rotating outer cylinder is sleeved on the rotating inner cylinder, a lifting groove is provided on the cylinder wall of the rotating outer cylinder with a spiral upward direction, and the guide protrusion is also located in the lifting groove; the top of the lifting shaft extends to the mounting hole, and the lifting / lowering is achieved by the relative forward / reverse rotation of the rotating inner cylinder and the rotating outer cylinder.
8. The positioning and mounting device for electronic components according to claim 7, characterized in that: The regulating subject comprises: a second bevel gear, the second bevel gear meshing with the first bevel gear; an adjusting rod, one end of which is connected to the second bevel gear and the other end of which is located in the adjusting socket; A knob is mounted on the adjusting rod and is at least partially located outside the adjusting socket.
9. The electronic component positioning and mounting device according to claim 1, characterized in that: The bottom of the base is also provided with an anti-skid pad.
10. The electronic component positioning and mounting device according to claim 1, characterized in that: It also includes a support column for supporting a PCB board, the PCB board is fixed on the support column, the electronic components are clamped in the clamping space, and are lifted by the lifting and adjusting support member to the installation position of the electronic components on the PCB board.