Circuit board positioning structure and communication device

Abstract

The circuit board positioning structure comprises a recess structure arranged on a circuit board and a distance component connected with the circuit board and a component to be assembled, wherein the recess structure comprises a positioning surface, and the distance component is used for limiting the relative position of the circuit board and the component to be assembled by abutting against the positioning surface. The embodiment of the present application can not only eliminate the thickness error of the circuit board, so that the circuit board can be smoothly assembled on the component to be assembled, but also has convenient processing and simple structure, thereby reducing the equipment and processing cost.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of communication technology, in particular, to a circuit board positioning structure and a communication device. BACKGROUND

[0002] Common communication devices are mostly unit functional modules with communication single boards (single circuit boards, such as printed circuit boards (PCB)). With the development of communication technology, the signal rate and capacity of the corresponding communication device increase rapidly, and the function of the single board for carrying communication services is increasingly powerful, and the integration of the single board increases. In order to solve the problem of too high integration of the single board, some communication devices currently begin to apply double-layer single boards.

[0003] However, the related technology has the problem of difficult assembly of the circuit board when applying the double-layer single board, for example, the matching relationship between the optical module and the connector on the circuit board and the front panel and the back panel is difficult to guarantee. SUMMARY

[0004] Embodiments of the present application aim to at least solve one of the technical problems in the prior art, and propose a circuit board positioning structure and a communication device, which can not only eliminate the thickness error of the circuit board to enable the circuit board to be smoothly assembled on the to-be-assembled part, but also are convenient to process and simple in structure, thereby reducing the equipment and processing costs.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application provide a circuit board positioning structure, comprising a recess structure arranged on a circuit board, and a distance assembly connected with the circuit board and a to-be-assembled part, wherein the recess structure comprises a positioning surface, and the distance assembly is used to limit the relative position of the circuit board and the to-be-assembled part by abutting against the positioning surface.

[0006] As another technical solution, the embodiments of the present application also provide a communication device, comprising a to-be-assembled part and at least one circuit board assembled on the to-be-assembled part, characterized in that the communication device further comprises the above-mentioned circuit board positioning structure provided by the embodiments of the present application, which is used to limit the relative position of each circuit board and the to-be-assembled part.

[0007] The beneficial effects of the embodiments of the present application are as follows:

[0008] The circuit board positioning structure provided by the embodiment of the present application has a recess structure on the circuit board, the recess structure comprises a positioning surface, and a distance setting component is abutted against the positioning surface to define the relative position of the circuit board and the component to be assembled. Since the surface machining precision of the recess structure is high (for example, the milling machining tolerance can reach ±0.1 mm), the thickness tolerance of the circuit board at the recess structure can cover the original thickness tolerance of the circuit board by abutting the positioning surface of the recess structure against the distance setting component, so that the circuit board can be smoothly assembled on the component to be assembled, and the circuit board positioning structure provided by the embodiment of the present application is convenient to process and simple in structure, thereby reducing the equipment and processing cost.

[0009] The communication device provided by the embodiment of the present application can smoothly assemble the circuit board on the component to be assembled by adopting the above-mentioned circuit board positioning structure provided by the embodiment of the present application, and is convenient to process and simple in structure, thereby reducing the equipment and processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0011] Figure 1 The assembly drawing of the circuit board adopted by the first embodiment of the present application;

[0012] Figure 2A The assembly drawing of the circuit board positioning structure provided by the first embodiment of the present application;

[0013] Figure 2B The Figure 2A The enlarged view of the A area in the middle;

[0014] Figure 3 The assembly drawing of the circuit board positioning structure provided by the first embodiment of the present application;

[0015] Figure 4 The radial section view of the recess adopted by the first embodiment of the present application;

[0016] Figure 5 The partial top view of the first circuit board adopted by the first embodiment of the present application;

[0017] Figure 6 The structure drawing of the adapter adopted by the first embodiment of the present application;

[0018] Figure 7A The assembly drawing of the circuit board positioning structure provided by the second embodiment of the present application;

[0019] Figure 7BThis is another assembly diagram of the circuit board positioning structure provided in the second embodiment of the present invention;

[0020] Figure 8 This is an assembly diagram of the circuit board positioning structure provided in the third embodiment of the present invention.

[0021] Figure label:

[0022] 1. Front panel; 11. Main body; 12. Adapter plate; 2. Back panel; 21a, 21b, 21c. Back panel connectors; 3a, 3a'. Upper circuit board; 3b. Lower circuit board; 3c. Middle circuit board; 32. Groove; 32a. Positioning surface; 32'. Step; 33. First through hole; 4, 4', 4”. Spacing assembly; 4a', 4a”. First sub-assembly; 4b', 4b”. Second sub-assembly; 4ba”. First set of second sub-assemblies; 4bb”. Second set of second sub-assemblies; 41, 41', 41”. First connector; 42, 42' 42”, second connector; 43, 43’, 43”, third connector; 44, fourth connector; 45, fifth connector; 42a, screw head; 5, adapter; 51, flange; 52, ring body; 53, other end face of flange; 6a, 6b, 6c, optical module; 7a, 7b, 7c, connector; t1, thickness of upper circuit board 3a; t2, thickness of lower circuit board 3b; d, distance between B side of lower circuit board 3b and upper surface of adapter plate 12; D, distance between A side of upper circuit board 3a and upper surface of adapter plate 12. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Please see Figure 1The first embodiment of the present invention takes the assembly of two circuit boards (3a, 3b) onto an accessory to be assembled as an example. Specifically, the accessory to be assembled includes a front panel 1 and a back panel 2 arranged opposite to each other. The front panel 1 includes a main body 11 and an adapter plate 12 connected thereto. The adapter plate 12 is located between the main body 11 and the back panel 2 of the front panel 1, and one end of the adapter plate 12 is fixedly connected to the main body 11. The adapter plate 12 can be perpendicular to the main body 11. The two circuit boards (3a, 3b) are located between the main body 11 and the back panel 2 of the front panel 1. The upper circuit board 3a is provided with an optical module 6a and a connector 7a. The lower circuit board 3b is provided with an optical module 6b and a connector 7b. The optical modules 6a and 6b are both embedded in the openings on the front panel 1. The connectors 7a and 7b are respectively inserted into the back panel connectors 21a and 21b on the back panel 2, thereby realizing the assembly of the two circuit boards (3a, 3b).

[0025] In related technologies, due to the limitations of the material and processing method of the circuit board, the highest standard for its thickness error is 10% of the board thickness. For example, a board thickness of 3mm often results in a tolerance of ±0.3mm. Since the two circuit boards (3a, 3b) are assembled together, the tolerance will be superimposed. For the upper circuit board 3a, the tolerance will be amplified to ±0.6mm. This often makes it difficult to guarantee the fit between the optical module 6a and the connector 7a and the front panel 1 and the back panel 2, respectively, thus making it impossible to assemble the upper circuit board 3a.

[0026] Specifically, the thickness of the upper circuit board 3a is t1, and the thickness of the lower circuit board 3b is t2. Both of these dimensions have a 10% tolerance. Therefore, the tolerance of the distance D between the A side (upper surface) of the upper circuit board 3a and the upper surface of the adapter plate 12 will change with t1 and t2. Meanwhile, the distance d between the B side (lower surface) of the lower circuit board 3b and the upper surface of the adapter plate 12 is constant (achieved through a distance fixing component, the specific structure of which will be described in detail below). In this case, the change of the distance D directly affects the position of the optical module 6a and the connector 7a set on the upper circuit board 3a. The distance D is closely related to the tolerance of the thickness t1 of the upper circuit board 3a. Therefore, eliminating the influence of the thickness t1 tolerance is the key to determining whether the optical module 6a and the connector 7a can be smoothly inserted into the panel 1 and the back panel 2, respectively.

[0027] To eliminate the influence of the thickness t1 tolerance mentioned above, the first embodiment of the present invention provides a circuit board positioning structure, such as... Figure 2A and Figure 2BAs shown, the assembly to be installed takes panel 1 and back panel 2 as examples, and panel 1 includes a main body 11 and an adapter plate 12 connected thereto; both circuit boards (3a, 3b) are assembled on panel 1 and back panel 2. The circuit board positioning structure includes recessed structures provided on each circuit board and a spacing component 4; wherein, the recessed structure includes grooves 32 provided on each circuit board, for the lower circuit board 3b, the groove 32 is located on surface A (upper surface) of circuit board 3b; for the upper circuit board 3a, the groove 32 is located on surface B (lower surface) of circuit board 3a, and the grooves 32 on the two circuit boards (3a, 3b) are opposite to each other. The bottom surface of each groove 32 is configured as a positioning surface 32a, and the spacing component 4 defines the relative position of the two circuit boards (3a, 3b) and the adapter plate 12 by abutting against the positioning surface 32a of the recessed structure on the two circuit boards (3a, 3b).

[0028] Because the aforementioned groove 32 has high machining precision, for example, the tolerance of milling can reach ±0.1mm, by abutting the positioning surface 32a of the groove 32 against the spacer component 4, the thickness tolerance of the circuit board at the groove 32 can cover the original thickness tolerance of the circuit board. For example, due to the limitations of the circuit board material and processing method, the highest standard for its thickness error is 10% of the board thickness. For example, a board thickness of 3mm often results in a tolerance of ±0.3mm. Thus, the thickness tolerance of the circuit board at locations other than the groove 32 is ±0.3mm, while the thickness tolerance of the circuit board at the groove 32 is ±0.1mm (taking milling as an example). Based on this, since the positioning surface 32a of the groove 32 abuts against the spacer component 4, the tolerance of the aforementioned distance D depends on the thickness tolerance of the circuit board at the groove 32, and is no longer affected by the thickness tolerance of the circuit board at locations other than the groove 32. That is, the influence of the original thickness tolerance of the circuit board is eliminated, thereby allowing the circuit board to be smoothly assembled onto the components to be assembled.

[0029] Specifically, such as Figure 2A As shown, the distance D is equal to the sum of the thickness t3 of the upper circuit board 3a at the groove 32, the height of the spacer assembly 4, the thickness t4 of the lower circuit board 3b at the groove 32, and the distance d. It is assumed that the height tolerance of the spacer assembly 4 is ±0.05mm. The distance d remains constant under the action of the spacer assembly 4. Therefore, the tolerance of the distance D is equal to the sum of the tolerance of the thickness t3, the tolerance of the spacer assembly 4, and the tolerance of the thickness t4, that is, D = 0.1 + 0.05 + 0.1 = 0.205mm, where all these tolerances are positive and negative tolerances.

[0030] By controlling the tolerance of the distance D to around 0.205mm, the assembly requirements of the circuit board can be met, the thickness error of the circuit board can be eliminated, and the circuit board can be successfully assembled onto the accessories to be assembled. Moreover, the circuit board positioning structure provided in this embodiment of the invention is easy to process and has a simple structure, thereby reducing equipment and processing costs.

[0031] Optional, such as Figure 4 As shown, the radial cross-sectional shape of the groove 32 includes circular, elliptical, or polygonal shapes, etc. Specifically, Figure 4 Figure (1) shows an oblong groove 32, Figure (2) shows a hexagonal groove 32, Figure (3) shows a rectangular groove 32, and Figure (4) shows a circular groove 32.

[0032] It should be noted that in this embodiment, the recessed structure includes a groove 32 formed on the circuit board. However, the embodiments of the present invention are not limited to this. In practical applications, the recessed structure may also include a step 32' formed on the circuit board. For example, as Figure 5 As shown, a step 32' is formed on surface A or surface B of the lower circuit board 3b, and the step surface of the step 32' is configured as a positioning surface.

[0033] The following is combined with Figure 2A and Figure 2B The structure and function of the spacing component 4 used in this embodiment will be described in detail. Specifically, taking two circuit boards (3a, 3b) as an example, the lower circuit board 3b, which is closer to the adapter plate 12, is the first circuit board, and the upper circuit board 3a, which is farther away from the adapter plate 12, is the second circuit board. The two are spaced apart. For the lower circuit board 3b, the groove 32 is located on the A side (upper surface) of the circuit board 3b; for the upper circuit board 3a, the groove 32 is located on the B side (lower surface) of the circuit board 3a, and the grooves 32 on the two circuit boards (3a, 3b) are opposite to each other.

[0034] The distance fixing component 4 includes at least one set, for example Figure 2A and Figure 3 The positioning components 4 are in two sets. Each set of positioning components 4 is used to define the relative positions of the first circuit board and the second circuit board with the adapter plate 12 by abutting against the positioning surface 32a of the groove 32 on the first circuit board (i.e., the lower circuit board 3b) and the second circuit board (i.e., the upper circuit board 3a).

[0035] In this embodiment, as Figure 2BAs shown, both the first circuit board (i.e., the lower circuit board 3b) and the second circuit board (i.e., the upper circuit board 3a) are provided with first through holes 33. One end of the first through hole 33 is located on the positioning surface 32a of the groove 32 of the circuit board, and the other end is located on the surface of the circuit board opposite to the positioning surface 32a. For example, as shown in the figure... Figure 4 and Figure 5 As shown, the first through hole 33 is correspondingly disposed at the location of the groove 32 or step 32' of the circuit board, and penetrates the circuit board along the thickness direction of the circuit board.

[0036] like Figure 2A and Figure 2B As shown, each set of positioning components 4 includes a first connector 41, a second connector 42, and a third connector 43. The first connector 41 is located between the first circuit board (i.e., the lower circuit board 3b) and the second circuit board (i.e., the upper circuit board 3a). One end of the first connector 41 abuts against the positioning surface 32a of the groove 32 on the second circuit board, and the other end abuts against the positioning surface 32a of the groove 32 on the first circuit board. One end of the second connector 42 passes through the first through hole 33 on the first circuit board and is detachably connected to the first connector 41. The other end of the second connector 42 is connected to the adapter plate 12. One end of the third connector 43 passes through the first through hole 33 on the second circuit board and is detachably connected to the first connector 41.

[0037] In this embodiment, the first connector 41 includes a columnar nut; the second connector 42 includes a first screw; and the third connector 43 includes a second screw. Both the first and second screws are threadedly connected to the columnar nut. For example, the first screw is a press-fit screw, and its screw head 42a can be fixedly connected to the adapter plate 12 by press-fitting. For example, the screw head 42a has a groove that mates with a connecting protrusion mounted on the adapter plate 12. In this way, the screw head 42a can limit the relative position of the lower circuit board 3b and the adapter plate 12, so that the distance d between the B-side (lower surface) of the lower circuit board 3b and the upper surface of the adapter plate 12 remains constant, thereby ensuring that the lower circuit board 3b can be smoothly assembled onto the component to be assembled.

[0038] The first connector 41 mentioned above includes a columnar nut, the two end faces of which abut against the positioning surface 32a of the groove 32 on the two circuit boards (3a, 3b), and the two ends of the columnar nut have threaded holes for engaging with the first screw and the second screw respectively to achieve a fastening effect.

[0039] It should be noted that in practical applications, the structure and connection method of the first connector 41, the second connector 42, and the third connector 43 are not limited to the screw and nut connection scheme used in this embodiment. For example, the connection method between the first connector 41 and the second connector 42 and the third connector 43 can also be other detachable connection methods such as snap-fit ​​or plug-in. Furthermore, the structure of each of the first connector 41, the second connector 42, and the third connector 43 can be adaptively designed for different connection methods. For example, if the connection method between the first connector 41 and the second connector 42 and the third connector 43 is snap-fit, then corresponding slots and snap-fit ​​elements are provided on the first connector, the second connector 42, and the third connector 43. In addition, the first connector 41 can also adopt any other structure such as a cone or a conical shape. In short, the structure and connection method of the first connector 41, the second connector 42, and the third connector 43 only need to achieve the functions of distance setting and connection.

[0040] It should be noted that in this embodiment, there are two sets of the aforementioned spacing components 4, and there are also two grooves 32 on each circuit board, with each spacing component 4 being arranged in a one-to-one correspondence. Of course, in practical applications, there may also be one set or more than three sets of the aforementioned spacing components 4, with the number of grooves 32 on each circuit board being the same as the number of spacing components 4, and arranged in a one-to-one correspondence.

[0041] Optional, such as Figure 6 As shown, the circuit board positioning structure also includes an adapter 5, which is stacked on the positioning surface 32a of the groove 32, and one end of the first connector 41 abuts against the adapter 5. Similar to the groove 32, the adapter 5 is not limited by materials and processing, and its processing accuracy is relatively high compared to the circuit board, for example, reaching ±0.1mm, or even ±0.05mm. By abutting the adapter 5 against the spacing component 4, the thickness tolerance of the circuit board at the adapter 5 can also cover the original thickness tolerance of the circuit board, thereby meeting the assembly requirements of the circuit board.

[0042] Furthermore, by designing different dimensions of the adapter 5, such as its dimension in the thickness direction of the circuit board, it can be adapted to spacing components of different heights, thereby expanding the applicability of the spacing components and improving installation flexibility. Specifically, in this embodiment, the adapter 5 includes a ring 52 sleeved on the second connector 42 and a flange 51 disposed at one end of the ring 52. One end face of the flange 51 overlaps with the positioning surface 32a of the groove 32, and the other end face 53 of the flange 51 abuts against one end of the second connector 42. In this case, the thickness tolerance of the flange 51 determines the tolerance of the aforementioned distance D, and is no longer affected by the thickness tolerance of the circuit board at positions other than the flange 51. That is, the influence of the original thickness tolerance of the circuit board is eliminated, thereby allowing the circuit board to be smoothly assembled onto the component to be assembled.

[0043] It should be noted that in this embodiment, the groove 32 on the lower circuit board 3b is located on surface A of the circuit board 3b. However, the embodiments of the present invention are not limited to this. In practical applications, the groove 32 on the lower circuit board 3b can also be located on surface B of the circuit board 3b. In this case, the second connector 42 abuts against the bottom surface 32a of the groove 32. For example, if the second connector 42 is a first screw, one end face of its screw head 42a abuts against the bottom surface 32a of the groove 32.

[0044] It should also be noted that in this embodiment, the two circuit boards (3a, 3b) are two single boards, each mounted on the front panel 1 and the back panel 2 respectively. However, the embodiments of the present invention are not limited to this. In practical applications, any one of the circuit boards can be mounted only on the front panel 1 or the back panel 2, for example, as shown below. Figure 3 As shown, the upper circuit board 3a' is a sub-board of the lower circuit board 3b, and the optical module 6a on the circuit board 3a' is embedded in the opening on the panel 1, while the circuit board 3a' is not connected to the back panel 2.

[0045] Please see Figure 7A The circuit board positioning structure provided in the second embodiment of the present invention differs from that in the first embodiment in that the spacing component positions a single circuit board. Specifically, the assembly to be installed also takes a front panel 1 and a back panel 2 as examples, and the front panel 1 includes a main body 11 and a connecting plate 12 connected thereto; both circuit boards (3a, 3b) are assembled on the front panel 1 and the back panel 2. The circuit board positioning structure includes recessed structures provided on each circuit board, and a spacing component 4'; wherein, the recessed structure includes grooves 32 provided on each circuit board, for the lower circuit board 3b, the grooves 32 are located on the B-side (lower surface) of the circuit board 3b; for the upper circuit board 3a, the grooves 32 are located on the B-side (lower surface) of the circuit board 3a, and the grooves 32 on the two circuit boards (3a, 3b) are interleaved. The bottom surface of each groove 32 is configured as a positioning surface 32a. The recessed structure used in this embodiment, whose unmentioned structures and functions have been described in detail in the first embodiment above, will not be repeated here.

[0046] The following is combined with Figure 7A The structure and function of the spacing component 4' used in this embodiment are described in detail. Specifically, taking a two-layer circuit board (3a, 3b) as an example, the lower circuit board 3b closer to the adapter plate 12 is the first circuit board, and the upper circuit board 3a further away from the adapter plate 12 is the second circuit board, with the two spaced apart. The spacing component 4' includes at least one set of first sub-components 4a' and at least one set of second sub-components 4b', for example... Figure 7AThere are two sets of the first sub-component 4a' and the second sub-component 4b'. The first sub-component 4a' is used to define the relative position of the first circuit board and the adapter plate 12 by abutting against the positioning surface 32a of the groove 32 on the first circuit board (i.e., the lower circuit board 3b). The second sub-component 4b' is used to define the relative position of the second circuit board and the adapter plate 12 by abutting against the positioning surface 32a of the groove 32 on the second circuit board (i.e., the upper circuit board 3a). As can be seen, each of the first sub-components 4a' and each of the second sub-components 4b' is used to individually define the distance between the first circuit board and the second circuit board.

[0047] In this embodiment, a first through hole is also provided in the first circuit board (i.e., the lower circuit board 3b). Figure 7A The structure and function of the first through hole are not shown in the diagram. Figure 2B The first through hole 33 is the same as the first through hole 33 in the first circuit board. One end of the first through hole is located on the positioning surface 32a of the groove 32 on the first circuit board, and the other end is located on the surface of the first circuit board opposite to the positioning surface 32a. Each set of first sub-assemblies 4a' includes a fourth connector 44 and a fifth connector 45, wherein one end of the fourth connector 44 passes through the first through hole and is detachably connected to the fifth connector 45; the other end of the fourth connector 44 is connected to the adapter plate 12; and the fourth connector 44 abuts against the positioning surface 32a.

[0048] In this embodiment, the fifth connector 45 includes a columnar nut; the fourth connector 44 includes a third screw; the third screw and the columnar nut are threaded together. The structure and function of the third screw are the same as those of the first screw used in the first embodiment described above. For example, the third screw is a press-fit screw, and its screw head structure is similar to... Figure 2A The screw head 42a is the same as that in the adapter plate 12 and can be fixedly connected to it by crimping. In this way, the screw head can limit the relative position of the lower circuit board 3b and the adapter plate 12, so that the distance d between the B side (lower surface) of the lower circuit board 3b and the upper surface of the adapter plate 12 is constant, thereby ensuring that the lower circuit board 3b can be smoothly assembled onto the part to be installed.

[0049] It should be noted that in this embodiment, the fifth connector 45 is only used to connect with the fourth connector 44 to fix the lower circuit board 3b. In this case, the columnar nut included in the fifth connector 45 has a threaded hole at only one end so that it can be threadedly connected with the third screw, and its height dimension is smaller than that of the columnar nut used in the first embodiment.

[0050] In this embodiment, a second through hole is also provided in the second circuit board (i.e., the upper circuit board 3a). Figure 7A The structure and function of the second through hole are not shown in the diagram.Figure 2B (The second through hole is the same as the first through hole 33 in the circuit board). One end of the second through hole is located on the positioning surface 32a of the groove 32 on the second circuit board, and the other end is located on the surface of the second circuit board that is opposite to the positioning surface 32a.

[0051] like Figure 7A As shown, each second sub-component 4b' includes a first connector 41', a second connector 42', and a third connector 43', wherein the first connector 41' is located between the first circuit board (i.e., the lower circuit board 3b) and the second circuit board (i.e., the upper circuit board 3a), and one end of the first connector 41' (i.e., Figure 7A The upper end of the first connector 41' abuts against the positioning surface 32a of the groove 32 on the second circuit board; one end of the second connector 42' passes through the first circuit board and is detachably connected to the first connector 41'; the other end of the second connector 42' is connected to the adapter plate 12. Furthermore, a third through hole 34 is provided in the first circuit board at a position corresponding to the groove 32 on the second circuit board. One end of the second connector 42' passes through this third through hole 34 and is detachably connected to the first connector 41'. In this case, the other end of the first connector 41' (i.e., Figure 7A The lower end of the first connector 41' is connected only to the second connector 42' and does not abut against the first circuit board (the circuit board has a third through hole 34 for the first connector 41' to pass through, instead of a groove). One end of the third connector 43' passes through the second through hole on the second circuit board and is detachably connected to the first connector 41'.

[0052] Optionally, the first connector 41' includes a columnar nut; the second connector 42' includes a first screw; and the third connector 43' includes a second screw; both the first screw and the second screw are threadedly connected to the columnar nut. The structure and function of the columnar nut, the first screw, and the second screw used in this embodiment are the same as those used in the first embodiment, except that the columnar nut or the first screw does not abut against the first circuit board.

[0053] It should be noted that in this embodiment, the groove 32 is disposed on the B-side (lower surface) of the circuit board 3b. In this case, the fourth connector 44 abuts against the bottom surface 32a of the groove 32. However, the embodiments of the present invention are not limited thereto. In practical applications, such as... Figure 7B As shown, the groove 32 can also be provided on the A side (upper surface) of the circuit board 3b. In this case, the lower end of the fifth connector 45 abuts against the bottom surface 32a of the groove 32.

[0054] It should also be noted that the other structures and functions of the circuit board positioning structure not mentioned in this embodiment have been described in detail in the first embodiment above, and will not be repeated here.

[0055] Please see Figure 8 The circuit board positioning structure provided in the third embodiment of the present invention is an extension based on the second embodiment described above. Specifically, the assembly to be installed also takes a front panel 1 and a back panel 2 as examples, and the front panel 1 includes a main body 11 and an adapter plate 12 connected thereto; and, in this embodiment, taking three-layer circuit boards (3a, 3b, 3c) all assembled on the front panel 1 and the back panel 2 as an example, similar to the upper circuit board 3a and the lower circuit board 3b, the middle circuit board 3c is provided with an optical module 6c and a connector 7c, wherein the optical module 6c is embedded in the opening on the front panel 1; the connector 7c is inserted into the back panel connector 21c on the back panel 2, thereby realizing the assembly of the circuit board 3c.

[0056] Three-layer circuit boards (3a, 3b, 3c) are spaced apart on one side of the adapter board 12, and the lower circuit board 3a closest to the adapter board 12 is the first circuit board, and the remaining circuit boards are all second circuit boards, located on one side of the first circuit board. That is, the upper circuit board 3b and the middle circuit board 3c are both second circuit boards. The circuit board positioning structure includes recessed structures on each circuit board and a spacing component 4”. The recessed structures include grooves 32 on each circuit board. For the lower circuit board 3b, the groove 32 is located on the B-side (lower surface) of the circuit board 3b. In practical applications, the groove 32 can also be located on the A-side (upper surface) of the circuit board 3b. For the upper circuit board 3a and the middle circuit board 3c, the grooves 32 are located on the B-side (lower surface) of the circuit boards 3a and 3c, respectively. Furthermore, the grooves 32 on the three circuit boards (3a, 3b, 3c) are staggered. The bottom surface of each groove 32 is configured as a positioning surface 32a. The recessed structures used in this embodiment, whose unmentioned structures and functions have been described in detail in the second embodiment above, will not be repeated here.

[0057] The following is combined with Figure 8 The structure and function of the distance fixing component 4” used in this embodiment will be described in detail. Specifically, the distance fixing component 4” includes at least one set of first sub-components 4a” and at least one set of second sub-components 4b” corresponding to each second circuit board, for example Figure 8 The first sub-component 4a” is in two sets; each second circuit board is provided with a second sub-component 4b”, where the first set of second sub-component 4ba” is provided for the upper circuit board 3a; and the second set of second sub-component 4bb” is provided for the middle circuit board 3c.

[0058] In this embodiment, the structure and function of each set of first sub-components 4a” are the same as those of the first sub-components 4a' used in the second embodiment above. The structure and function of the second set of second sub-components 4bb” set on the circuit board 3c corresponding to the intermediate layer are the same as those of the second sub-components 4b' used in the second embodiment above. Since they have been described in detail in the second embodiment above, they will not be repeated here.

[0059] Corresponding to the upper circuit board 3a, a first set of second sub-components 4ba” is provided. The difference between this first set of second sub-components 4bb” and the aforementioned second set of second sub-components 4ba” is only that: the first connector 41” in the first set of second sub-components 4ba” needs to penetrate all the second circuit boards (i.e., the intermediate circuit boards 3c) located between the second circuit board (i.e., the upper circuit board 3a) and the first circuit board (i.e., the lower circuit board 3b) that the first connector 41” abuts against, that is, through the third through hole 34 on the intermediate circuit board 3c. The second connector 42” passes through the third through hole 34 on the first circuit board (i.e., the lower circuit board 3b) and is detachably connected to the first connector 41”. In this case, the other end of the first connector 41” (i.e., Figure 8 The lower end of the first set of second sub-components 4ba” is connected only to the second connector 42”, and does not abut against the lower circuit board 3b and the middle circuit board 3c. The unmentioned structure and function of the first set of second sub-components 4ba” are the same as those of the second sub-components 4b’ used in the second embodiment described above. Since they have been described in detail in the second embodiment described above, they will not be repeated here.

[0060] It should be noted that in practical applications, there can be one circuit board or N circuit boards, where N is an integer greater than 1. The above embodiments provide examples with two and three circuit boards respectively. If there are four or five or more circuit boards, the number of the second sub-component 4b” and the height of the corresponding components can be adjusted accordingly. The structure and function of the second sub-component 4b” are similar to those of the second sub-component 4b” corresponding to three circuit boards.

[0061] In summary, the circuit board positioning structure provided in the above embodiments of the present invention has a recessed structure on the circuit board, which includes a positioning surface. A spacer component abuts against the positioning surface to define the relative position of the circuit board and the component to be assembled. Because the surface machining accuracy of the recessed structure is high (e.g., the tolerance of milling can reach ±0.1mm), by abutting the positioning surface of the recessed structure against the spacer component, the thickness tolerance of the circuit board at the recessed structure can cover the original thickness tolerance of the circuit board, thereby enabling the circuit board to be smoothly assembled onto the component to be assembled. Furthermore, the circuit board positioning structure provided in the above embodiments of the present invention is easy to process and has a simple structure, thereby reducing equipment and processing costs.

[0062] As another technical solution, embodiments of the present invention also provide a communication device, including a component to be assembled and at least one circuit board mounted on the component, for example, such as... Figure 1 As shown, the accessory to be installed includes a front panel 1 and a back panel 2 arranged opposite to each other. The front panel 1 includes a main body 11 and an adapter plate 12 connected thereto. Both circuit boards (3a, 3b) are mounted on the front panel 1 and the back panel 2.

[0063] The communication device also includes the circuit board positioning structure provided in the above embodiments of the present invention, which is used to define the relative position of each circuit board and the component to be assembled. For example, it defines the relative position of each of the two circuit boards (3a, 3b) and the adapter board 12 so that both module 6a and optical module 6b are embedded in the opening on the panel 1; connector 7a and connector 7b are respectively inserted into backplane connector 21a and backplane connector 21b on the backplane 2, thereby realizing the assembly of the two circuit boards (3a, 3b).

[0064] In practical applications, optical modules can be installed on the circuit board as needed, or they can be omitted.

[0065] The communication device provided in the embodiments of the present invention, by adopting the circuit board positioning structure provided in the above embodiments of the present invention, not only enables the circuit board to be smoothly assembled on the parts to be assembled, but also facilitates processing and has a simple structure, thereby reducing equipment and processing costs.

[0066] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A circuit board positioning structure characterized by comprising: The recess structure includes a positioning surface, and the distance assembly is used to define the relative position of the circuit board and the component to be assembled by abutting against the positioning surface. The circuit board is N, N is an integer greater than 1, wherein one of the circuit boards is a first circuit board, and the remaining circuit boards are second circuit boards, and the second circuit boards are spaced apart in a direction away from the first circuit board, and the recess structure on each second circuit board is located on a side close to the first circuit board. The distance assembly includes at least one set, and the distance assembly is used to define the relative position of the first circuit board and the corresponding second circuit board and the component to be assembled by abutting against the positioning surface of the recess structure on the first circuit board and the second circuit board. A first through hole is provided in the first circuit board and each second circuit board, one end of the first through hole is located on the positioning surface of the recess structure of the circuit board, and the other end is located on the surface of the circuit board away from the positioning surface. Each set of distance assemblies includes a first connecting piece, a second connecting piece, and a third connecting piece, wherein one end of the first connecting piece abuts against the positioning surface of the recess structure on the corresponding second circuit board, and the other end penetrates all the second circuit boards between the second circuit board abutting against the first connecting piece and the first circuit board. One end of the second connecting piece penetrates the first through hole on the first circuit board and is detachably connected with the first connecting piece, the other end of the second connecting piece is connected with the component to be assembled, and the other end of the first connecting piece or the second connecting piece abuts against the positioning surface of the recess structure on the first circuit board. One end of the third connecting piece penetrates the first through hole on the second circuit board and is detachably connected with the first connecting piece.

2. The circuit board positioning structure according to claim 1, characterized by The recess structure includes a groove formed on the circuit board, and the bottom surface of the groove is configured as the positioning surface; or the recess structure includes a step formed on the circuit board, and the step surface of the step is configured as the positioning surface.

3. The circuit board positioning structure according to claim 1, characterized by The circuit board positioning structure further includes an adapter, and the adapter is stacked on the positioning surface, and the distance assembly abuts against the adapter.

4. A circuit board positioning structure characterized by comprising: The recess structure includes a positioning surface, and the distance assembly is used to define the relative position of the circuit board and the component to be assembled by abutting against the positioning surface; the circuit board is N, N is an integer greater than 1, wherein one of the circuit boards is a first circuit board, and the remaining circuit boards are second circuit boards, and the second circuit boards are spaced apart in a direction away from the first circuit board, and the recess structure on each second circuit board is located on a side close to the first circuit board. The distance assembly comprises at least one set of first subassembly and at least one set of second subassembly corresponding to each of the second circuit board, wherein the first subassembly is used to define the relative position of the first circuit board and the to-be-assembled part by abutting against the positioning surface of the recess structure on the first circuit board; each set of the second subassembly is used to define the relative position of the second circuit board and the to-be-assembled part by abutting against the positioning surface of the recess structure on the second circuit board; a first through hole is further arranged in the first circuit board, one end of the first through hole is located on the positioning surface of the recess structure on the first circuit board, and the other end is located on the surface of the first circuit board away from the positioning surface; The first subassembly comprises a fourth connecting piece and a fifth connecting piece, wherein one end of the fourth connecting piece passes through the first through hole and is detachably connected with the fifth connecting piece; the other end of the fourth connecting piece is connected with the to-be-assembled part; and the fourth connecting piece or the fifth connecting piece abuts against the positioning surface.

5. The circuit board positioning structure according to claim 4, characterized by A second through hole is further arranged in each of the second circuit boards, one end of the second through hole is located on the positioning surface of the recess structure on the second circuit board, and the other end is located on the surface of the second circuit board away from the positioning surface; Corresponding to each of the second circuit boards, each set of the second subassembly comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein one end of the first connecting piece abuts against the positioning surface of the recess structure on the corresponding second circuit board, and the other end penetrates all the second circuit boards between the first circuit board and the second circuit board abutting against the first connecting piece; One end of the second connecting piece penetrates the first circuit board and is detachably connected with the first connecting piece; the other end of the second connecting piece is connected with the to-be-assembled part; One end of the third connecting piece passes through the second through hole on the corresponding second circuit board and is detachably connected with the first connecting piece.

6. The circuit board positioning structure according to claim 4, wherein The recess structure comprises a groove formed on the circuit board, and the bottom surface of the groove is configured as the positioning surface; or the recess structure comprises a step formed on the circuit board, and the step surface of the step is configured as the positioning surface.

7. The circuit board positioning structure according to claim 4, wherein The circuit board positioning structure further comprises an adapter, the adapter is stacked on the positioning surface, and the distance assembly abuts against the adapter.

8. A communication device comprising a component to be assembled and at least one circuit board assembled on the component to be assembled, characterized in that, The communication device further comprises the circuit board positioning structure of any one of claims 1-7, which is used to define the relative position of each circuit board and the to-be-assembled part.

9. The communication device of claim 8, wherein, The to-be-assembled part comprises a front panel and a back panel arranged oppositely; the circuit board is located between the front panel and the back panel and is assembled on at least one of the front panel and / or the back panel.

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