Precise clamp for welding miniature antenna balun

Abstract

The utility model provides a precision clamp for welding a miniature antenna balun. The precision clamp comprises a base, a first fixing assembly which is installed on the base and used for fixing a radio frequency head, and a second fixing assembly which is installed on the base and used for fixing the antenna balun. The first fixing assembly and the second fixing assembly are oppositely arranged, the first fixing assembly comprises a first X-direction adjusting sliding table and a Z-direction adjusting sliding table, and the second fixing assembly comprises a second X-direction adjusting sliding table and a Y-direction adjusting sliding table. The radio frequency head and the antenna balun are arranged on the first fixing assembly and the second fixing assembly respectively, the positions of the radio frequency head and the antenna balun are adjusted through the multiple adjusting sliding tables, a feed needle of the radio frequency head can be accurately placed in the middle of the balun, and the positioning precision and the welding quality of the micro antenna are improved.

Description

Technical Field

[0001] The utility model relates to the field of miniature antenna welding, in particular to a precision fixture used for miniature antenna balun welding. Background Art

[0002] With the development of wireless communication technology, antennas are widely used in mobile phones, aerospace and remote control communications. In recent years, as communication equipment has gradually developed towards miniaturization and integration, planar spiral micro antennas have been widely used due to their wide bandwidth, circular polarization and low profile. The quality of planar spiral micro antennas is related to the stability and service life of communication equipment.

[0003] In the production process of existing millimeter-wave planar spiral antennas, since the antenna balun is very small, it is difficult to fix the antenna balun and the RF head during welding, and the positioning accuracy of the antenna balun and the RF head after fixation is poor, which results in poor welding accuracy of the antenna balun, affecting the performance and service life of the antenna. Utility Model Content

[0004] The purpose of the utility model is to provide a precision fixture for welding the balun of a micro antenna, so as to solve the technical problem in the prior art that the positioning accuracy of the existing micro antenna balun welding is poor, resulting in low welding quality.

[0005] A precision fixture for welding a miniature antenna balun, comprising a base, a first fixing component mounted on the base for fixing a radio frequency head, and a second fixing component mounted on the base for fixing an antenna balun;

[0006] The first fixing component is arranged opposite to the second fixing component, and the first fixing component includes a first L-shaped mounting plate, and the first L-shaped mounting plate includes a first horizontal plate and a first vertical plate. A rectangular limiting groove for placing the RF head mounting plate is provided on the end surface of the first vertical plate close to the second fixing component, and a fastening threaded hole penetrating the upper end surface of the rectangular limiting groove is provided on the top surface of the first vertical plate, and a locking bolt is threadedly connected to the inner thread of the fastening threaded hole.

[0007] Optionally, the first fixing assembly further includes a first X-axis adjustment slide mounted on the base, and a Z-axis adjustment slide mounted on the first X-axis adjustment slide;

[0008] The first transverse plate is installed on the Z-axis adjustment slide, and the first vertical plate is located at one end of the first transverse plate close to the second fixing assembly.

[0009] Optionally, the second fixing assembly includes a Y-direction adjustment slide mounted on the base, a second X-direction adjustment slide mounted on the Y-direction adjustment slide, and a second L-shaped mounting plate mounted on the second X-direction adjustment slide;

[0010] The second L-shaped mounting plate includes a second transverse plate and a second vertical plate. The second vertical plate is located at one end of the second transverse plate close to the first fixing component. The second transverse plate is mounted on the second X-axis adjustment slide. A first rectangular notch is provided at the top of the second vertical plate.

[0011] Optionally, a balun placement plate is installed on an end surface of the second vertical plate close to one end of the first fixing assembly;

[0012] A second rectangular notch is formed at the top of the balun placement plate, and slots for placing the antenna balun are formed on both side walls of the second rectangular notch.

[0013] Optionally, a wire feeding mechanism for conveying metal wire is also installed on the second L-shaped mounting plate;

[0014] The wire feeding mechanism comprises a wire reel placement rack mounted on the second horizontal plate, a wire feeder mounted on an end surface of the second vertical plate away from the first fixing assembly; and a straightening guide tube mounted in the first rectangular notch;

[0015] The feed port at one end of the straightening tube is connected to the discharge end of the wire feeder, and the discharge port at the other end of the straightening tube is located above the antenna balun on the balun placement plate.

[0016] Optionally, a plurality of limiting bosses for forming a gap between the balun placement plate and the second vertical plate are further provided on the end surface of the balun placement plate close to one end of the second vertical plate, and a cutter for cutting the metal wire is installed in the gap.

[0017] Optionally, the cutter comprises a rotating plate, one end of the rotating plate is provided with a cutting edge, and the other end of the rotating plate is provided with a long sliding groove;

[0018] A rotating shaft is installed in the middle of the rotating plate, and two ends of the rotating shaft are rotatably installed on the balun placement plate and the second vertical plate respectively.

[0019] Optionally, a conical feed port is provided at the feed end of the wire feeder, and a wire feeder impeller is installed on the side wall of the wire feeder. When the wire feeder impeller rotates, the wire feeder pushes the metal wire forward.

[0020] Optionally, a fill light device is further installed on the first horizontal plate, and a fill light end of the fill light device is located above the first vertical plate and the second vertical plate.

[0021] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0022] 1. The present application arranges the RF head and the antenna balun on a first fixed component and a second fixed component respectively, and adjusts the positions of the RF head and the antenna balun through multiple adjustment slides, so that the feed pin of the RF head can be accurately placed in the middle position of the balun, thereby improving the positioning accuracy and the welding quality of the micro antenna.

[0023] 2. The present application sets a wire feeding mechanism on the second L-shaped mounting plate so that the front end of the metal wire is located in the middle position of the antenna balun. When the feeding needle of the RF head is precisely placed in the middle position of the balun, the wire feeder pushes the metal wire forward so that the metal wire is aligned and in contact with the feeding needle of the RF head, thereby improving the positioning accuracy of the metal wire and the feeding needle of the RF head.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be realized and obtained through the following description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings of the present utility model are described as follows.

[0026] Figure 1 It is a schematic diagram of the structure of the precision fixture used for welding the miniature antenna balun in the utility model.

[0027] Figure 2 It is a schematic structural diagram of the first L-shaped mounting plate and the radio frequency head in the utility model.

[0028] Figure 3 It is a structural schematic diagram of the first L-shaped mounting plate in the utility model.

[0029] Figure 4 It is a structural schematic diagram of the radio frequency head in the utility model.

[0030] Figure 5 It is a schematic diagram of the partial structure of the second fixing component in the utility model.

[0031] Figure 6 It is a structural schematic diagram of the balun placement plate in the utility model.

[0032] Figure 7 It is a structural schematic diagram of the second L-shaped mounting plate and the wire feeding mechanism in the utility model.

[0033] Figure 8 It is a structural schematic diagram of the cutter in the utility model.

[0034] In the figure: 1-base; 2-RF head; 3-antenna balun; 4-first L-shaped mounting plate; 401-first horizontal plate; 402-first vertical plate; 5-rectangular limit groove; 6-fastening threaded hole; 7-locking bolt; 8-first X-direction adjustment slide; 9-Z-direction adjustment slide; 10-Y-direction adjustment slide; 11-second X-direction adjustment slide; 12-second L-shaped mounting plate; 1201-second horizontal plate; 1202-second Vertical plate; 13-first rectangular notch; 14-balun placement plate; 15-second rectangular notch; 16-card slot; 17-wire reel placement rack; 18-wire feeder; 1801-conical feed port; 1802-wire feeder impeller; 19-straightening guide tube; 20-limiting boss; 21 cutter; 2101-rotating plate; 2102-cutting edge; 2103-waist-shaped slide; 2104-rotating shaft; 22-light filler. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Example:

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 A precision fixture for welding a miniature antenna balun is shown, comprising a base 1, a first fixing component mounted on the base 1 for fixing a radio frequency head 2, and a second fixing component mounted on the base 1 for fixing an antenna balun 3;

[0038] The first fixing component is arranged opposite to the second fixing component, and the first fixing component includes a first L-shaped mounting plate 4, and the first L-shaped mounting plate 4 includes a first horizontal plate 401 and a first vertical plate 402. A rectangular limiting groove 5 for placing the mounting plate of the radio frequency head 2 is provided on the end surface of the first vertical plate 402 close to the second fixing component, and a fastening threaded hole 6 penetrating the upper end surface of the rectangular limiting groove 5 is provided on the top surface of the first vertical plate 402, and a locking bolt 7 is connected to the inner thread of the fastening threaded hole 6.

[0039] In this embodiment, before welding, the RF head 2 is placed in the rectangular limiting groove 5, and the RF head 2 is locked by the locking bolt 7 (the locking bolt 7 presses the side wall of the RF head 2 during the downward movement).

[0040] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the first fixing assembly further includes a first X-direction adjustment slide 8 mounted on the base 1, and a Z-direction adjustment slide 9 mounted on the first X-direction adjustment slide 8;

[0041] The first transverse plate 401 is installed on the Z-axis adjustment slide 9 , and the first vertical plate 402 is located at one end of the first transverse plate 401 close to the second fixing assembly.

[0042] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the second fixing assembly includes a Y-direction adjustment slide 10 mounted on the base 1, a second X-direction adjustment slide 11 mounted on the Y-direction adjustment slide 10, and a second L-shaped mounting plate 12 mounted on the second X-direction adjustment slide 11;

[0043] The second L-shaped mounting plate 12 includes a second transverse plate 1201 and a second vertical plate 1202 . The first vertical plate 1202 is located at one end of the first transverse plate 1201 close to the first fixing component. The first transverse plate 1201 is mounted on the second X-axis adjustment slide 11 . A first rectangular notch 13 is provided at the top of the first vertical plate 1202 .

[0044] In this embodiment, the first X-direction adjustment slide 8 and the second X-direction adjustment slide 11 are provided to increase the travel of the fixture in the x-direction, and when adjusting the distance between the RF head and the antenna balun, they can be adjusted simultaneously to increase the adjustment speed. The first X-direction adjustment slide 8, the Z-direction adjustment slide 9, the Y-direction adjustment slide 10 and the second X-direction adjustment slide 11 are provided so that the feed pin of the RF head 2 can be accurately placed in the middle of the balun, and the feed pin of the RF head 2 can be aligned with the metal wire.

[0045] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a balun placement plate 14 is installed on the end surface of the first vertical plate 1202 close to one end of the first fixing assembly;

[0046] A second rectangular notch 15 is formed at the top of the balun placement plate 14 , and slots 16 for placing the antenna balun 3 are formed on both side walls of the second rectangular notch 15 .

[0047] In this embodiment, the antenna balun 3 is placed in the slot 16 before welding.

[0048] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a wire feeding mechanism for conveying metal wires is also installed on the second L-shaped mounting plate 12;

[0049] The wire feeding mechanism comprises a wire reel placement rack 17 mounted on the second horizontal plate 1201, a wire feeder 18 mounted on an end surface of the first vertical plate 1202 away from the first fixing assembly; and a straightening guide tube 19 mounted in the first rectangular notch 13;

[0050] The feed port at one end of the straightening conduit 19 is connected to the discharge end of the wire feeder 18 , and the discharge port at the other end of the straightening conduit 19 is located above the antenna balun 3 on the balun placement plate 14 .

[0051] In this embodiment, before welding, the metal wire reel is placed on the wire reel placement rack 17, so that the front end of the metal wire passes through the wire feeder 18 and the straightening tube 19 in sequence. After the metal wire passes through the straightening tube 19, its outer wall contacts the upper end surface of the balun placement plate 14, which is convenient for welding.

[0052] In this embodiment, the straightening conduit 19 is made of a polytetrafluoroethylene tube with a self-lubricating effect, which is used to guide the metal wire from the wire feeder to the welding position and straighten the wire.

[0053] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a plurality of limiting bosses 20 for forming a gap between the balun placement plate 14 and the second vertical plate 1202 are provided on the end surface of the balun placement plate 14 close to the second vertical plate 1202, and a cutter 21 for cutting the metal wire is installed in the gap.

[0054] In this embodiment, the limiting bosses 20 are arranged at the four fixing holes of the balun placement plate 14, ensuring that the cutter 21 has a sufficient rotation angle.

[0055] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the cutter 21 comprises a rotating plate 2101, one end of the rotating plate 2101 is provided with a cutting edge 2102, and the other end of the rotating plate 2101 is provided with a long sliding groove 2103;

[0056] A rotating shaft 2104 is installed in the middle of the rotating plate 2101 , and both ends of the rotating shaft 2104 are rotatably installed on the balun placement plate 14 and the second vertical plate 1202 .

[0057] In this embodiment, when it is necessary to cut the metal wire, the rotating plate 2101 is driven to rotate, and the cutting edge 2102 cuts the metal wire. In this embodiment, the rotating plate 2101 can be manually pushed to rotate, or a driving cylinder or electric cylinder can be set, and the telescopic end of the driving cylinder or electric cylinder can be slidably set in the long slide groove 2103.

[0058] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the feeding end of the wire feeder 18 is provided with a conical feeding port 1801, and a wire feeder impeller 1802 is installed on the side wall of the wire feeder 18. When the wire feeder impeller 1802 rotates, the wire feeder 18 pushes the metal wire forward.

[0059] In this embodiment, a conical feed port 1801 is provided so that the wire feeding hole can be quickly aligned when threading the wire. The metal wire engages with the inside of the wire feeder 18. When the wire feeder impeller 1802 is rotated, the wire feeder 18 pushes the wire forward. In this embodiment, a servo motor can be provided to drive the wire feeder impeller 1802, or the wire feeder impeller 1802 can be rotated manually.

[0060] like Figure 1 As shown, a fill light device 22 is also installed on the first horizontal board 401 , and the fill light end of the fill light device 22 is located above the first vertical board 402 and the second vertical board 1202 .

[0061] In this embodiment, a fill light 22 is provided to increase the ambient light intensity during metal wire alignment and welding.

[0062] In summary, the specific steps of welding in this embodiment are:

[0063] S1: Place the radio head 2 into the rectangular limiting groove 5, lock the radio head 2 with the locking bolt 7, and place the antenna balun 3 into the slot 16;

[0064] S2: adjusting the position between the radio head 2 and the antenna balun 3 by means of the first X-direction adjustment slide 8, the Z-direction adjustment slide 9, the Y-direction adjustment slide 10 and the second X-direction adjustment slide 11, so that the feed pin of the radio head 2 can be accurately placed in the middle of the balun;

[0065] S3: rotating the wire feeder impeller 1802, the wire feeder 18 pushes the metal wire forward, so that the metal wire is aligned with and contacts the feeding needle of the radio frequency head 2;

[0066] S4: Use a welding gun to weld the metal wire, the radio frequency head 2 and the antenna balun 3;

[0067] S5: After the welding is completed, the cutter 21 cuts the metal wire;

[0068] S6: Drive the first fixing assembly and the second fixing assembly back to the initial position, loosen the locking bolt 7, and take out the welded product.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A precision fixture for welding micro-antenna balun, characterized in that: It comprises a base (1), a first fixing component installed on the base (1) for fixing a radio frequency head (2), and a second fixing component installed on the base (1) for fixing an antenna balun (3); The first fixing component is arranged opposite to the second fixing component, and the first fixing component comprises a first L-shaped mounting plate (4), and the first L-shaped mounting plate (4) comprises a first horizontal plate (401) and a first vertical plate (402), and a rectangular limiting groove (5) for placing a mounting plate of the radio frequency head (2) is provided on the end surface of the first vertical plate (402) close to the second fixing component, and a fastening threaded hole (6) penetrating the upper end surface of the rectangular limiting groove (5) is provided on the top surface of the first vertical plate (402), and a locking bolt (7) is connected to the inner thread of the fastening threaded hole (6).

2. A precision fixture for welding micro-antenna balun according to claim 1, characterized in that: The first fixing assembly further comprises a first X-direction adjustment slide (8) mounted on the base (1), and a Z-direction adjustment slide (9) mounted on the first X-direction adjustment slide (8); The first transverse plate (401) is mounted on the Z-axis adjustment slide (9), and the first vertical plate (402) is located at one end of the first transverse plate (401) close to the second fixing assembly.

3. A precision fixture for welding balun of a micro antenna according to claim 1, characterized in that: The second fixing assembly comprises a Y-direction adjustment slide (10) mounted on the base (1), a second X-direction adjustment slide (11) mounted on the Y-direction adjustment slide (10), and a second L-shaped mounting plate (12) mounted on the second X-direction adjustment slide (11); The second L-shaped mounting plate (12) comprises a second transverse plate (1201) and a second vertical plate (1202), wherein the second vertical plate (1202) is located at one end of the second transverse plate (1201) close to the first fixing assembly, the second transverse plate (1201) is mounted on the second X-axis adjustment slide (11), and a first rectangular notch (13) is provided at the top of the second vertical plate (1202).

4. A precision fixture for welding balun of a micro antenna according to claim 3, characterized in that: A balun placement plate (14) is installed on the end surface of the second vertical plate (1202) close to one end of the first fixing component; A second rectangular notch (15) is provided at the top of the balun placement plate (14), and slots (16) for placing the antenna balun (3) are provided on both side walls of the second rectangular notch (15).

5. A precision fixture for welding balun of a micro antenna according to claim 4, characterized in that: The second L-shaped mounting plate (12) is also provided with a wire feeding mechanism for conveying metal wires; The wire feeding mechanism comprises a wire reel placement rack (17) mounted on the second horizontal plate (1201), a wire feeder (18) mounted on an end surface of the second vertical plate (1202) away from the first fixing assembly; and a straightening guide tube (19) mounted in the first rectangular notch (13); The feed port at one end of the straightening tube (19) is connected to the discharge end of the wire feeder (18), and the discharge port at the other end of the straightening tube (19) is located above the antenna balun (3) on the balun placement plate (14).

6. A precision fixture for welding balun of a micro antenna according to claim 4, characterized in that: A plurality of limiting bosses (20) are also provided on the end surface of the balun placement plate (14) close to one end of the second vertical plate (1202) for forming a gap between the balun placement plate (14) and the second vertical plate (1202), and a cutter (21) for cutting the metal wire is installed in the gap.

7. A precision fixture for welding balun of a micro antenna according to claim 6, characterized in that: The cutter (21) comprises a rotating plate (2101), one end of the rotating plate (2101) is provided with a cutting edge (2102), and the other end of the rotating plate (2101) is provided with a long sliding groove (2103); A rotating shaft (2104) is installed in the middle of the rotating plate (2101), and two ends of the rotating shaft (2104) are rotatably installed on the balun placement plate (14) and the second vertical plate (1202) respectively.

8. The precision fixture for welding balun of a micro antenna according to claim 5, characterized in that: The feeding end of the wire feeder (18) is provided with a conical feeding port (1801), and a wire feeder impeller (1802) is installed on the side wall of the wire feeder (18). When the wire feeder impeller (1802) rotates, the wire feeder (18) pushes the metal wire forward.

9. The precision fixture for welding balun of a micro antenna according to claim 3, characterized in that: A fill light device (22) is also installed on the first horizontal board (401), and a fill light end of the fill light device (22) is located above the first vertical board (402) and the second vertical board (1202).

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