JPH0344199A - Method and jig for assembling windshield net for microphone head and welding device - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the microphone characteristic by providing a spread step fitting to an outer diameter and an inner diameter of an intermediate joint ring whose inner diameter is smaller than an outer diameter of an open ridge of each net placed at upper and lower parts to a lower part of an inner circumferential face of a ring hole whose diameter is smaller than the inner diameter of the intermediate joint ring. CONSTITUTION:A windshield net assembling jig C is formed to be a ring whose center is provided with a ring hole 11 and a spread step 12 is provided to a lower part of the ring hole 11. Then the relation of D1<D4<D2=D3 exists as the design, where D1 is a diameter of an inner circumferential face 11a of the ring hole 11, D2 is a diameter of an inner circumferential face 12a of the spread step 12, D3 is a diameter of an outer circumferential face 6a of an intermediate joint ring 6 and D4 is a diameter of an inner circumferential face 6b of the intermediate joint ring 6. Moreover, it is preferred to design the size of a lower step 12b of the spread step 12 to be 1/2h, where (h) is the height of the intermediate joint ring 6. Thus, the jig with excellent external appearance, high durability, strong and uniform quality and low cost is obtained and the deterioration in the characteristic is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an assembly jig J3, a method, and a welding device for upper and lower mesh bodies of a windshield that constitute a microphone head.
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[Prior art 1] In general, for a windshield mesh in a microphone head, upper and lower meshes each having a hemispherical cross section are used, and a windshield mesh is located in the center of the lower mesh and is used to provide internal protection. The microphone [1] is assembled by attaching a base for introducing the main body of the microphone, and joining the partial and lower nets at their respective front edges via an intermediate joining ring.

However, as a conventional method for assembling this type of windshield net, the intermediate joint ring is formed to have an 11-shaped longitudinal section.
3. After fitting the opening edges of these upper and lower base nets into the respective lower J3 and lower mounting grooves, press and adhere them with adhesive so that they do not come out. ,
Alternatively, it is joined by pressure caulking, or it is attached from the outside in spots, and
Intermediate joining ring I! The cross section is formed into a horizontal T-shape, and the opening edges of the upper and lower base nets are fitted into the upper and lower inner mounting steps, and the outer edges are similarly pressure-adhered, pressure-crimped, and crimped. I try to do spot soldering etc.

[Problem to be solved by Komei 1] However, in the conventional windshield net assembly method described above, the connection of the upper and lower base nets through the intermediate joint ring is relatively complicated and time consuming. Not only is the fit loose, making it vulnerable to external shocks, but the intermediate joint ring protrudes from the internal joint surface of the assembled windshield, causing the sponge between it and the microphone body to be deformed. However, there is the inconvenience that the same effect cannot be obtained with one gram of glue.Also, depending on the type of adhesive, it is easily affected by external stimuli, and when applying pressure caulking, it is difficult to get used to scratching the external surface. However, there is also a problem in terms of strength when attaching spot semi-III from the outside. In the same case, it is impossible to bond or weld the opening edge of each net from the inside, so the layers may peel off, and the microphone [1] may deteriorate and be recycled. B had drawbacks such as distortion and cracking of the sound.

The present inventor created a microphone head having a special and novel structure in order to solve these conventional problems.

That is, Fig. 7 is a cross-sectional view showing the general configuration of the entire microphone head, and Fig. 8 (a>(b) shows the joints of the upper and lower base nets and the intermediate joint ring before and after welding, respectively. FIG. 9(a) is an enlarged cross-sectional view;
(b) is an enlarged cross-sectional view showing the joint portions of the upper and lower frame net bodies and the intermediate joint ring before and after welding according to the above and other embodiments, respectively.

In FIGS. 7 and 8, the windshield net A 33 on the microphone head has an upper net 1 and a lower net 2 each having a hemispherical cross section.
．． 2, for example, each with 10 meshes and a hole diameter of 1 mm.
Outside 1a, 2a of φ, 30 mesh, hole diameter 0.28m
wll b in mφ.

2b and inner mesh 1c with 40 mesh and hole diameter 0.06mmφ
, 2c, and in the center of the lower net 2, there is a microphone [1] for introducing the main body B, for example.
A ring-shaped cap member 3 having a thread 3a on the inner circumferential surface of the frontage is used for screwing together.

Therefore, each of the upper and lower mesh bodies 1.2 is constructed as shown in FIG.
As shown in a) and (b), at least a ring-shaped welding thread half opening]7 or After applying silver wax for welding (hereinafter referred to as thread solder, etc.), the edges of each opening (4°5) are compressed to a slightly compressed diameter and tightly fitted (Fig. 8 (a)), and then the outer periphery is The heating properties 8 are provided by high frequency dielectric means, and the intervening thread solder etc. 7
When the welded parts are completely melted, a pressure of 9 is applied between the welded parts to melt them (welded parts 10), and then they are allowed to cool naturally and fixed in place 1f1 (see Fig. 8). b)).

Here, the upper part of the inner circumferential surface of the intermediate joining ring 6 described above,
It is difficult to compress the diameter of the opening edges 4 and 5 of the lower base net 1.2 by hand evenly, and the compression is concentrated at the fingertips, resulting in distortion and deformation. On the other hand, it is extremely difficult to fit the inner peripheral fixing device of the intermediate joining ring 6 into the inner periphery of the intermediate joining ring 6. However, it is extremely difficult to fit the wire solder etc. 7 sandwiched between the opening edges 4.5 into the intermediate joining ring 6 from the outside. It is best to uniformly apply thread soldering to seven bodies at the same time while applying pressure from the upper side, as it will not cause heating spots and will even out the surface tension and hair loss, and cannot be done by hand. In addition, when even higher adhesive strength is required, Fig. 9(a)(b)
), by forming an inner groove 60 in the middle part of the inner circumferential surface of the intermediate joining ring 6, the melted solder wire etc. Because it flows in and solidifies, it can sufficiently strengthen the adhesive force.

In this aspect, the present invention provides a microphone head windshield net assembly jig and method, and a welding device, which are used for assembling and welding the upper and lower nets of the Asahi rope. /v.

[Means for Solving the Problem 1 The problem described in @ is solved by using a 1IXK structure in which the windshield fine assembly DF & tool of the microphone head of the present invention has an inner diameter slightly smaller than the outer diameter of the opening edge of each of the upper and lower nets. The inner diameter of the intermediate joining ring is defined by an enlarged diameter stepped portion having an inner peripheral surface having the same inner diameter as the outer diameter of the flat plate-shaped intermediate joining ring, and a downward stepped surface formed at a depth where the intermediate joining ring is somewhat fitted. The method for assembling the microphone windshield net of the present invention includes the above-mentioned constituent means provided on the inner circumferential surface r of the ring hole having a slightly smaller diameter than The ring hole of the assembly jig is inserted and lowered, and the diameter is elastically compressed by the ring hole until the opening edge of the lower mesh body is immersed in the downward stepped surface of the enlarged diameter step provided at the bottom of the ring hole. Then, the lower mesh body is pushed from above into the intermediate joint ring that is somewhat fitted into the enlarged diameter stepped portion, and the opening edge of the lower mesh body is moved and lowered onto the inner circumferential surface of the intermediate joint ring. After the diameter has been reduced bX against the generated restoring force, the assembly jig is removed, and the assembly jig is inserted and lowered from the upper side of the upper mesh body with the ring hole facing down, and the opening edge of the upper mesh body is The intermediate joint is elastically compressed and fitted into the ring hole until it sinks into the downward stepped surface, and then the lower mesh body is reversed and the one-way opening edge on which the thread solder wire is placed one round is fitted into the middle joint. Fitting the ring somewhat into the enlarged diameter stepped portion of the assembly jig,
Further, by pushing the upper net member from above, the downward opening edge of the upper net member is moved down to the thread half ``υ'' of the inner circumferential surface of the intermediate joining ring, and is contracted against the elastic restoring force. The above configuration means for removing the assembly jig after radially fitting and assembling the upper mesh body and the lower mesh body with the intermediate joining ring, as well as the microphone head windshield mesh welding device of the present invention,
When the microbon head assembled with the intermediate joining ring in which the diameter-reduced inner edges of the opposing openings of the upper mesh body and the lower mesh body with the cap attached thereto, which sandwich the thread solder, etc., is housed and installed, the upper part of the opening is The above-mentioned fixing device body is composed of a fixing device body formed with a housing recess that supports the lower side of the intermediate joining ring, a pressurizing part that pressurizes the upper side of the upper mesh body, and a heating coil ring that covers the intermediate joining ring. This is achieved by employing the respective configuration means.

[Function 1] Since the present invention takes each of the above-mentioned means, if the assembly jig and square of the present invention are used, the upper and lower mesh bodies can be easily moved to the intermediate position by interposing wire solder or the like to the intermediate joining ring. The upper mesh body is quickly and securely fitted into the inside and assembled into a spherical shape using an intermediate joining ring, but the assembly structure is different from the conventional 11-shaped longitudinal section or horizontal T-shaped longitudinal section. Since the opening edges of the upper and lower nets are simply fitted loosely into the intermediate joining ring without applying any elastic stress, the mutual joining force cannot be maintained, and other joining methods such as adhesives or pressure may be used. Unless it is crimped or spot soldered, it will immediately disintegrate just by applying a small external force. As a result, in the conventional case 1
The intermediate joining ring, which had a flat plate shape in one cross section, could not be used. However, in the case of the present invention, when the opening edges of the upper and lower nets are fitted into the intermediate joining ring, a firm mechanical joining force acts due to the elastic restoring force of the diameter expansion of the opening edge, and a forced external force exceeding a certain level is applied. Since the bonding force is such that it will not disintegrate unless applied, the adhesion between the outer circumferential surface of the opening edge and the inner circumferential surface of the intermediate bonding ring is high.

Then, install the lower net in the four housing parts of the fixator body of the welding device, support and fix the lower surface of the intermediate joint ring with the open 1'' upper edge of the four housing parts, and then surround the intermediate joint ring. The heating coil ring is operated to apply a heating action 8 by high-frequency dielectric heating, and while the pressure section presses the upper side of the upper net, the wire solder, etc., which is pinched by the opposing opening edges, is simultaneously heated and melted uniformly. By promoting surface tension and capillary phenomenon, the molten solder etc. is spread evenly and evenly to improve adhesion, and then allowed to cool naturally to solidify and bond.

[Example] An embodiment of the jig of the present invention will be described with reference to FIG.

The microphone head windshield net assembly jig C of the present invention has a ring shape with a ring hole 11 inserted through the center, and an enlarged diameter stepped portion 12 is provided at the lower part of the ring hole 11.

Diameter of inner circumferential surface 11a of ring hole 11 = D1° Diameter of inner circumferential surface 12a of enlarged diameter step portion 12: D2 Diameter of outer circumferential surface 6a of intermediate joining ring 6: 03° Diameter of inner peripheral surface 6b of intermediate joining ring 6 : Please set it so that the relationship of the old translation with D4 holds true.

DI <D4 <D2=D3 In addition, the downward step surface 12b of the enlarged diameter step portion 12 is connected to the intermediate joining ring 6.
It is preferable to set the depth 1/2 hl, which is half the height h, but is not limited thereto.

The working procedure of the method of assembling the windshield net of the present invention using the assembly jig C of the present invention will be explained with reference to FIGS. 2 to 5.

First, the ring hole 11 of the assembly jig C is slid onto the outer peripheral surface of the lower mesh body 2 from above to the lower mesh body 2 with the cap member 3 attached in advance, and the lower mesh body 2 is inserted and lowered. A first stage whose diameter is elastically compressed by the ring hole 11 until the opening edge 5 of the ring hole 11 sinks into the downward step surface 12b of the enlarged diameter step portion 12 provided at the lower part of the ring hole 11, and is fitted into the inner circumferential surface 11a. work and then the second
As shown in the figure, the lower mesh body 2 is pushed into the middle 151 joining ring 6 which is half-fitted into the enlarged diameter stepped portion 12 from the 7th direction as shown in the figure.
The opening edge 5 of the lower mesh body 2 is connected to the inner circumferential surface 6 of the intermediate joining ring 6.
b Move to the upper part and remove the assembly jig C after the diameter is reduced and internally fitted against the elastic restoring force of the diameter. Separately, the upper net 1 is slid from the upper side to the outer peripheral surface and lowered to be inserted, and the ring hole 11 is elastically compressed by the diameter Q until the opening edge 4 of the upper net 1 is sunk into the downward step surface 12b. 3rd stage work of fitting into surface 11a (4th stage)
Refer to the figure>, then the lower mesh body 2 is reversed and the half of the intermediate joining ring 6 that fits the upward opening edge 5 on which the thread solder etc. 7 has been placed is attached to the enlarged diameter stepped portion 12 of the assembly jig C. In the fourth step of mating (see Fig. 5), the upper net 1 is further pushed in from above to move the downward opening edge 4 onto the thread solder etc. 7 of the inner periphery 6a of the intermediate joining ring 6 and expand it. 5th stage operation of removing the assembly jig C after diameter reduction internal fitting against the diameter elastic restoring force; Become.

On the other hand, an embodiment of the device according to the invention will be described with reference to FIG.

In the microphone head windshield net welding device of the present invention, when the assembly jig C and the windshield net A assembled by the above method are housed and installed, the opening upper edge 13a supports the lower side of the intermediate joining ring 6. a fixing device body 13 in which four housing parts 13b are recessed; a pressurizing part 15 that is tightly placed on the upper end of the upper mesh body 1 during welding and pressurized by the pressure force 9 of the magic thread 14 and pressing; and an intermediate joining ring 6. and a heating coil ring 16 that concentrically surrounds and performs high-frequency dielectric heating.

Therefore, the windshield net A assembled by the method of the present invention is thread soldered using the welding device of the present invention. 77 and weld the upper mesh body 1 and the lower mesh body 2 to the intermediate joining ring 6, the lower mesh body 2 is accommodated and installed in the accommodation recess 13b of the fixator body 13, and the upper edge of the frontage of the four accommodation parts 13b is After supporting and fixing the lower surface of the intermediate joining ring 6 with the part 13a, the heating coil ring 16 surrounding the intermediate joining ring 6 is operated to apply high frequency dielectric heating, and the upper end of the upper mesh body 1 is heated by the pressurizing part 15. The wire solder etc. 7 held by the opposing opening edge 4.5 is simultaneously heated and melted evenly while being compressed by the strip 14, promoting surface tension and capillary phenomenon to evenly and uniformly melt the solder etc. 7. The welded portion 10 is then allowed to cool naturally to form an assimilation bond.

[Effects of the Invention] Thus, by manufacturing a windshield net using the present invention, it is possible to obtain a durable, sturdy, homogeneous, and inexpensive item with good appearance, and it facilitates assembly, which was previously impossible, and simplifies the manufacturing work. It has excellent effects such as simplification, speeding up, certainty, and homogenization.

[Brief explanation of drawings]

Fig. 1 is a central vertical cross-sectional view showing an embodiment of the jig of the present invention;
Figures 5 to 5 are explanatory diagrams of the work procedure steps of the method of the present invention, and Figure 6
The figure is a sectional view at the center of the embodiment of the device of the present invention in a state of use.
Cross-sectional view, Figure 8 (a > (b) is an enlarged cross-sectional view showing the joint part of the upper and lower wire mesh bodies before and after welding with the middle 1 m joint ring, respectively, Figure 9 (a) ( b) is an enlarged sectional view showing the joint portions of the upper and lower wire mesh bodies and the intermediate joint ring before and after welding, respectively, according to another example of the above. Main body C... Assembly jig D... Welding device D1
...Inner circumferential surface diameter D2 of the ring hole...Inner circumferential surface diameter D3 of the enlarged diameter step portion...Outer circumferential surface diameter D4 of the intermediate joining ring...Inner peripheral surface diameter h of the intermediate joining ring... Height of intermediate joining ring 1... Upper mesh body 2... Lower mesh body 3...
Cap member 4.5... Opening edge 6... Intermediate joining ring 6a... Outer circumferential surface, 6b, 11 a, 12a... Inner circumferential surface 7... Thread solder, etc. 8... For heating η 9...
- Pressure force 10... Welded part 11... Ring hole 12... Expanded diameter stepped portion 12b... Downward stepped surface 13... Fixture body 13a... Upper edge of opening 13b... Accommodation recess 4...Stripe 5...Pressure part 6...Heating coil ring

Claims (3)

[Claims] 1. The inner circumferential surface has the same inner diameter as the outer diameter of the intermediate joint ring, which has a flat vertical cross section and has an inner diameter slightly smaller than the outer diameter of the opening edge of each of the upper and lower nets, and has a depth that allows the intermediate joint ring to fit somewhat. A windshield net assembly jig for a microphone head, comprising an enlarged-diameter stepped portion with a downward stepped surface formed at the lower part of the inner circumferential surface of the ring hole, the diameter of which is slightly smaller than the inner diameter of the intermediate joining ring. 2. First, the ring hole of the assembly jig is inserted and lowered from the upper side into the lower mesh body with the cap member attached and laid down. The lower mesh body is elastically compressed and fitted into the ring hole until it sinks into the downward stepped surface, and then the lower mesh body is pushed from above into the intermediate joining ring that is somewhat fitted into the enlarged diameter step portion. The opening edge of the intermediate joint ring is moved to the upper part of the inner circumferential surface of the intermediate joint ring, the diameter is reduced by resisting the elastic restoring force, and then the assembly jig is removed, and the upper mesh with the ring hole of the assembly jig turned down is removed. It is inserted and lowered from the upper side of the body, and the opening edge of the upper mesh body is elastically compressed by the ring hole until it is sunk into the downward stepped surface, and the lower mesh body is then inserted and inserted into the ring hole, and then the lower mesh body is reversed and thread soldered. Alternatively, the intermediate joining ring, which fits inside the upward opening edge on which silver wax is applied once, is slightly fitted into the enlarged diameter stepped part of the assembly jig, and the upper mesh body is further pushed in from above to close the upper opening. The downward opening edge of the net is moved onto the thread solder or silver wax on the inner circumferential surface of the intermediate joining ring, and after the diameter is reduced and internally fitted against the elastic restoring force, the assembly jig is removed, and the assembly jig is removed. A method for assembling a windshield net for a microphone head, comprising assembling a net and the lower net with the intermediate joining ring. 3. When the windshield net assembled with the intermediate joint ring in which the opposing opening edges of the upper net and the lower net with the base attached, which sandwich thread solder or silver wax are fitted inside with a reduced diameter, is housed and installed, the upper edge of the opening A microphone head comprising: a fixing body formed with a housing recess for supporting the lower side of the intermediate joining ring; a pressurizing section pressurizing the upper side of the upper mesh; and a heating coil ring surrounding the intermediate joining ring. Windshield net welding equipment