CN220217078U

CN220217078U - Ultrasonic welding tool

Info

Publication number: CN220217078U
Application number: CN202320968354.XU
Authority: CN
Inventors: 张俊利; 农家权
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-12-22
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses an ultrasonic welding tool, which comprises a base and a welding head, wherein a positioning structure is arranged on the base, the positioning structure forms a positioning groove for positioning a lower shell of a miniature loudspeaker module, the welding head is arranged corresponding to the positioning groove, and a contact protrusion and a first elastic contact pad are arranged on the bottom surface of the welding head. In the process of welding the upper shell and the lower shell of the micro-speaker module in an auxiliary manner by using the ultrasonic welding tool, the lower shell is completely positioned by the positioning structure of the base, so that the lower shell cannot displace relative to the base when receiving ultrasonic energy impact; after the welding head is pressed down, the first elastic contact pad is contacted with the top surface of the upper shell, and a large static friction force is formed between the first elastic contact pad and the top surface of the upper shell to stabilize the upper shell, so that the phenomenon that the upper shell slightly shakes relative to the welding head in the ultrasonic energy release process is improved, the phenomenon of air leakage at the slope position after the upper shell and the lower shell are welded is further improved, and the welding quality and the production yield of the micro-speaker module are improved.

Description

Ultrasonic welding tool

Technical Field

The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding tool.

Background

The micro speaker module is widely applied to portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like. The miniature loudspeaker module comprises a module shell and a loudspeaker monomer arranged in the module shell, wherein the loudspeaker monomer divides the internal space of the module shell into a front cavity and a rear cavity, the front cavity is communicated with a sound outlet on the module shell, and the module shell comprises an upper shell and a lower shell which are connected. In the micro speaker module, the waterproof test item needs to test the air tightness by 100%, which clearly puts a high requirement on the air tightness of the rear cavity of the micro speaker module.

In the prior art, the sealing connection of the upper shell and the lower shell is generally realized by utilizing ultrasonic welding, in some micro-speaker modules, a slope structure exists at the interface of the upper shell and the lower shell, in the ultrasonic welding process, ultrasonic waves instantaneously generate energy, slight shaking dislocation can occur between the upper shell and the lower shell, and especially in the slope structure, slight air leakage is easily caused in the slope structure because of slight shaking, so that the production yield is influenced.

Disclosure of Invention

The utility model solves the technical problems that: an ultrasonic welding tool capable of improving welding quality is provided.

In order to solve the technical problems, the utility model adopts the following technical scheme: an ultrasonic welding tool, comprising:

the base is provided with a positioning structure, and the positioning structure forms a positioning groove for positioning the lower shell of the micro-speaker module;

the welding head is arranged corresponding to the positioning groove, and a contact protrusion and a first elastic contact pad are arranged on the bottom surface of the welding head.

In an embodiment, the positioning structure is a positioning strip, the number of the positioning strips is multiple, and the positioning strips are surrounded to form the positioning groove.

In an embodiment, the base and at least one of the positioning strips are integrally formed as a one-piece structure.

In one embodiment, the base is detachably connected to at least one of the positioning strips.

In an embodiment, the contact protrusion is a ring frame structure, and the first elastic contact pad is located in a hollow area of the ring frame structure.

In an embodiment, the material of the first elastic contact pad is silica gel.

In an embodiment, the thickness of the first resilient contact pad is greater than the height of the contact bump.

In an embodiment, a gap is provided between the peripheral wall of the first resilient contact pad and the inner side wall of the contact protrusion.

In an embodiment, the bottom surface of the first elastic contact pad is provided with an anti-slip line.

In an embodiment, a placement groove is formed in the bottom surface of the positioning groove, a second elastic contact pad is arranged in the placement groove, and the top surface of the second elastic contact pad protrudes out of the bottom surface of the positioning groove.

The utility model has the beneficial effects that:

in the process of welding the upper shell and the lower shell of the micro-speaker module in an auxiliary manner by using the ultrasonic welding tool, the lower shell is completely positioned by the positioning structure of the base, so that the lower shell cannot displace relative to the base when receiving ultrasonic energy impact; after the welding head is pressed down, the first elastic contact pad is contacted with the top surface of the upper shell, and a large static friction force is formed between the first elastic contact pad and the top surface of the upper shell to stabilize the upper shell, so that the phenomenon that the upper shell slightly shakes relative to the welding head in the ultrasonic energy release process is improved, the phenomenon of air leakage at the slope position after the welding of the upper shell and the lower shell is improved, the ultrasonic welding quality is improved, and the production yield of the miniature loudspeaker module is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a micro-speaker module according to the prior art;

fig. 2 is a schematic structural diagram of an ultrasonic welding tool and a micro-speaker module according to a first embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a welding head in an ultrasonic welding tool according to a first embodiment of the present utility model.

Reference numerals illustrate:

1. an upper case;

2. a lower case;

3. a ramp structure;

4. a base; 41. a positioning strip;

5. welding head; 51. a contact protrusion; 52. a first elastic contact pad;

6. a gap.

Detailed Description

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In addition, if the meaning of "and/or" is presented throughout this document to include three parallel schemes, taking "and/or" as an example, including a scheme, or a scheme that is satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present utility model is as follows: an ultrasonic welding tool is used for assisting in welding an upper shell 1 and a lower shell 2 of a micro-speaker module, and particularly, when a slope structure 3 exists at the interface of the upper shell 1 and the lower shell 2, the ultrasonic welding tool can effectively improve the air leakage phenomenon at the slope structure 3.

The ultrasonic welding tool comprises a base 4 and a welding head 5, wherein the welding head 5 is arranged above the base 4, a positioning structure is arranged on the base 4, the positioning structure forms a positioning groove for positioning the lower shell 2 of the micro loudspeaker module, the welding head 5 is arranged corresponding to the positioning groove, and a contact protrusion 51 and a first elastic contact pad 52 are arranged on the bottom surface of the welding head 5.

It will be appreciated that the contact protrusion 51 corresponds to the interface (or referred to as a junction) of the upper case 1 and the lower case 2, and thus, the contact protrusion 51 has a ring frame structure. In order to make the first elastic contact pad 52 better contact and press against the upper shell 1, it is preferable that the first elastic contact pad 52 is located in the hollow area of the ring frame structure, so that not only a larger contact area between the first elastic contact pad 52 and the upper shell 1 can be ensured to improve static friction force between the first elastic contact pad 52 and the upper shell 1, but also an assembler can more conveniently position and install the first elastic contact pad 52 on the welding head 5.

Specifically, the positioning structure is a plurality of positioning strips 41, and the plurality of positioning strips 41 surround to form the positioning groove.

The positioning strips 41 are arranged in various manners, and the positioning strips 41 and the base 4 can be integrally formed into an integral structure, or can be integrally connected into a split structure through connection modes such as clamping, gluing, welding or fastening connection through fasteners. Optionally, the base 4 and at least one of the positioning strips 41 are integrally formed as a one-piece structure; the base 4 is detachably connected to at least one of the positioning strips 41.

The material of the first elastic contact pad 52 is silica gel, and in this embodiment, the first elastic contact pad 52 is a high temperature resistant silica gel pad.

In order to allow the first elastic contact pad 52 to better contact the upper case 1, the thickness of the first elastic contact pad 52 is greater than the height of the contact protrusion 51. Thus, when the horn 5 is lowered, the first elastic contact pad 52 releases the upper case 1 before the contact protrusion 51.

A gap 6 is provided between the peripheral wall of the first elastic contact pad 52 and the inner side wall of the contact protrusion 51, and the gap 6 is used for providing a deformation allowance for the first elastic contact pad 52, so as to prevent a partial area of the deformed first elastic contact pad 52 from being transferred to the bottom surface of the contact protrusion 51 and affecting the welding effect between the upper case 1 and the lower case 2.

To improve the static friction between the first elastic contact pad 52 and the upper case 1, optionally, the bottom surface of the first elastic contact pad 52 is provided with anti-slip lines (not shown), which include, but are not limited to, diamond lines, straight lines, diagonal lines, etc.

Optionally, a placement groove (not shown) is provided on the bottom surface of the positioning groove, a second elastic contact pad (not shown) is provided in the placement groove, and the top surface of the second elastic contact pad protrudes out of the bottom surface of the positioning groove. The second elastic contact pad is used for contacting the lower shell 2 and forming larger static friction force with the lower shell 2, so that the lower shell 2 is prevented from shaking and misplacement relative to the base 4, the processing precision requirements of the base 4 and the positioning structure can be reduced, the manufacturing cost of the ultrasonic welding tool is controlled, and meanwhile, the welding quality of the upper shell 1 and the lower shell 2 of the micro-speaker module is further improved.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. An ultrasonic welding frock, its characterized in that: comprising

2. The ultrasonic welding tool of claim 1, wherein: the positioning structure is a plurality of positioning strips, and the plurality of positioning strips surround to form the positioning groove.

3. The ultrasonic welding tool according to claim 2, wherein: the base and at least one of the positioning strips are of an integrated structure formed by integrated processing.

4. The ultrasonic welding tool according to claim 2, wherein: the base is detachably connected with at least one positioning strip.

5. The ultrasonic welding tool of claim 1, wherein: the contact bulge is of a ring frame structure, and the first elastic contact pad is located in a hollow area of the ring frame structure.

6. The ultrasonic welding tool of claim 1, wherein: the first elastic contact pad is made of silica gel.

7. The ultrasonic welding tool of claim 1, wherein: the thickness of the first elastic contact pad is greater than the height of the contact protrusion.

8. The ultrasonic welding tool of claim 7, wherein: a gap is formed between the peripheral wall of the first elastic contact pad and the inner side wall of the contact protrusion.

9. The ultrasonic welding tool of claim 1, wherein: the bottom surface of the first elastic contact pad is provided with anti-slip lines.

10. The ultrasonic welding tool of claim 1, wherein: the bottom surface of constant head tank is equipped with the standing groove, be provided with the second elastic contact pad in the standing groove, the top surface of second elastic contact pad protrusion in the bottom surface setting of constant head tank.