CN113365459A

CN113365459A - Shell injection structure and tooth flushing device

Info

Publication number: CN113365459A
Application number: CN202110730934.0A
Authority: CN
Inventors: 郑自成; 李鹏; 孙玉超; 陆鹏飞; 陆松; 陈瑶
Original assignee: Gree Electric Appliances Inc of Zhuhai; Gree Tosot Suqian Home Appliances Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Gree Tosot Suqian Home Appliances Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-07

Abstract

The invention provides a shell injection molding structure and a tooth flushing device, wherein the shell injection molding structure comprises: the key-press structure comprises an injection molding shell, an injection molding display window and an injection molding key board, wherein a key area and a display area are arranged on the working surface of the injection molding shell, and a plurality of key holes are formed in the key area; the injection molding shell and the injection molding display window are subjected to first injection molding, so that the display surface of the injection molding display window is embedded in the inner wall of the display area to form a first shell injection molding assembly; the first shell injection molding assembly and the injection molding assembly key board are subjected to secondary injection molding, so that at least one key seat of the injection molding key board extends into the key hole and is subjected to injection molding. According to the shell injection molding structure and the tooth flushing device, the structure of the key plate and the display window is optimized by adopting the twice insert injection molding structure, the bonding area and the force between the key plate and the shell are increased, the key plate is in contact with the display window, the sealing effect is further increased, and the abnormal or damage of the tooth flushing device caused by leakage, key failure and water seepage due to the sealing failure of the display window is prevented.

Description

Shell injection structure and tooth flushing device

Technical Field

The invention belongs to the technical field of tooth flushing devices, and particularly relates to a shell injection molding structure and a tooth flushing device.

Background

The tooth irrigator is a popular personal care product at present, and needs to be in contact with water due to the special use environment, so that the tooth irrigator product has high requirements on water tightness. However, in order to meet the requirements of various functions, the tooth rinsing device needs to have a key structure on the body, and the key needs to generate a pressing action and move relative to the body to achieve the functions, and needs to have a certain rebound touch feeling, so that the key and the body cannot be integrated into a whole. The traditional key is formed by bonding the key with a machine body shell so as to achieve the effect of connection and sealing with the machine body shell. Such a connection structure is low in production efficiency and high in cost.

Meanwhile, the tooth flushing device needs to provide a state display function during working so as to indicate the real-time working state of a product, if a display window component is directly fixed on the machine body, the display window needs to be bonded with the machine body shell in an adhesive applying mode so as to achieve the effect of connection and sealing with the machine body shell, and the connecting structure is low in production efficiency and high in cost.

At present, the technical scheme is also adopted in the industry that the key and the machine body are combined to seal by using a soft rubber material (such as TPU and TPE) and an ABS insert for injection molding, taking the soft rubber material as a key part and the ABS insert as a machine body part. However, the existing sealing structure on the market is difficult to ensure the sealing property between the key and the machine body, the sealing is easy to lose efficacy under the condition that the key is pressed for many times or the stress is too large, and the water seepage can occur at the position of the key to enter the machine body, so that the tooth flushing device product is abnormal or even damaged.

Therefore, the technical problems to be solved in the art are that the production efficiency is low and the cost is high due to the fact that the key and the display window of the traditional tooth flushing device are directly fixed on the shell of the machine body.

Disclosure of Invention

The invention provides a shell injection molding structure and a tooth flushing device, aiming at solving the technical problems of low production efficiency and high cost caused by the fact that a key and a display window of the existing tooth flushing device are directly fixed on a shell of a machine body.

In order to solve the problems, the invention adopts the technical scheme that: provides a shell injection molding structure, which comprises an injection molding shell, an injection molding display window and an injection molding key board,

the working surface of the injection molding shell is provided with a key area and a display area, and the key area is provided with a plurality of key holes;

the injection molding shell and the injection molding display window are subjected to first injection molding, so that the display surface of the injection molding display window is embedded in the inner wall of the display area to form a first shell injection molding assembly;

the first shell injection molding assembly and the injection molding assembly key board are subjected to secondary injection molding, so that at least one key base of the injection molding key board extends into the key hole, and the injection molding key board is embedded in the inner wall of the first shell injection molding assembly to form a second shell injection molding assembly.

Furthermore, the display area is provided with a plurality of embedding holes; when the first time of injection molding, a plurality of bulges of the injection molding display window are correspondingly embedded into the embedding holes.

Furthermore, one end of the injection molding key board is embedded in the inner wall of the key area, and the other end of the injection molding key board is embedded in the back surface of the injection molding display window of the first shell injection molding assembly of the display window.

Furthermore, the injection molding key board is also provided with a plurality of hollow structures.

Further, the injection molding key board wraps the injection molding display window between the injection molding key board and the injection molding shell.

Preferably, the cross-section of the projections and the insertion holes is correspondingly circular, double 8-shaped, triangular or pentagram-shaped.

Furthermore, the combination part of the injection molding key board and the key area is in a concave-convex embedded structure.

Furthermore, the display area of the injection molding shell is made of a light-transmitting material, and the injection molding key board is made of a flexible material.

Preferably, the key base and the key hole are in a corresponding circle shape.

The invention also provides a tooth flushing device which comprises an electric device, an output end connected with the electric device, at least one key and a display screen.

Compared with the prior art, the shell injection molding structure and the tooth flushing device provided by the invention have the following beneficial effects:

the shell injection molding structure and the tooth flushing device provided by the invention adopt a twice-insert injection molding structure, simultaneously optimize the structures of the injection molding key board and the injection molding display window, increase the combination area of the injection molding key board and the shell of the machine body, simultaneously, the injection molding key board and the injection molding display window are also contacted, remelted and combined, thereby greatly improving the sealing effect of the product, solving the problems of leakage and water leakage caused by sealing failure at the position of the display window, and the problems that the key position is easy to fail and separate under the condition that the key is pressed for many times or the stress is overlarge, and the water seepage into the interior of the machine body can occur, so that the tooth flushing device product is abnormal or even damaged.

Drawings

FIG. 1 is a schematic structural view of an embodiment of an injection molding structure for a housing according to the present invention;

FIG. 2 is a sectional view taken along the line A-A in FIG. 1;

FIG. 3 is a sectional view taken along the line B-B in FIG. 2;

FIG. 4 is a schematic view of a portion of the area C in FIG. 2;

fig. 5 is a schematic structural diagram of an injection-molded display window according to an embodiment of the injection-molded housing structure provided in the present invention.

Wherein, in the drawings, the reference numerals are mainly as follows:

1-injection molding the housing; 11-a working surface; 2-injection molding a display window; 21-bulge; 22-back side; 3-injection molding a key board; 4-key hole; 31-a key base; 5-an insertion hole; 23-hollow structure.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to fig. 1 to 5 and the embodiments.

Referring to fig. 1-5, the injection molding structure of the housing of the present invention includes an injection molding housing 1, an injection molding display window 2, and an injection molding key board 3. The working face 11 of the injection molding shell 1 is provided with a key area and a display area, and the key area is provided with a plurality of key holes 4. Further, the display area of the injection-molded housing 1 is made of a light-transmitting material, such as a light-transmitting plastic, or composite material, and is preferably made of an ABS material. The length of the injection molded housing 1 is preferably 106.4 mm and the width is preferably 45.6 mm. The keydome preferably has a length of 98.5 mm, a width of 20.9 mm, and a thickness of 0.8 mm.

The injection molding shell 1 and the injection molding display window 2 are subjected to first injection molding, the injection molding display window 2 produced in advance is placed in an injection mold as an insert to be injected with the injection molding shell 1 together, the display surface of the injection molding display window 2 is embedded in the inner wall of the display area of the injection molding shell 1, and the injection molding shell and the injection molding display window are integrally formed into a first shell injection molding component. The injection molding display window 2 and the injection molding display window are welded together by the high temperature in the injection molding process, so that a traditional bonding process is reduced, and meanwhile, the injection molding display window 2 and the injection molding shell 1 are in sealed connection.

First shell subassembly and the subassembly keypad of moulding plastics are moulded plastics through the second time, the subassembly of moulding plastics of first shell that will mould plastics and obtain is whole to be arranged in injection mold as the inserts, mould plastics with the keypad 3 of moulding plastics together, make at least one (preferably two or more) keypad 31 of keypad 3 of moulding plastics stretch into in the key hole 4, and hug closely the cooperation with the inner wall of key hole 4 with the outer wall of keypad 31, and the one side gomphosis that the keypad 3 stretched out keypad 31 of moulding plastics is in the inner wall of the subassembly of moulding plastics of first shell, make the two whole group mould plastics and form the subassembly of moulding plastics of second shell.

Referring to fig. 1-2 and 5, in the present embodiment, the display area of the injection molding housing 1 is provided with a plurality of insertion holes 5. When the injection molding is performed for the first time, the plurality of protrusions 21 of the injection molding display window 2 are correspondingly embedded into the embedding holes 5, and the outer walls of the protrusions 21 are tightly attached to the inner walls of the embedding holes 5. As a preferred embodiment, the insertion hole 5 may be a through hole, and the end of the protrusion 21 extends out of the injection molded housing 1 through the insertion hole 5 or is flush with the outer surface of the injection molded housing 1, so as to extend the combination length of the protrusion 21 and the insertion hole 5 and increase the combination area of the protrusion and the insertion hole, and further improve the injection molding sealing property between the display area of the injection molded housing 1 and the injection molded display window 2. As a preferred embodiment, the cross-sections of the projections 21 and the insertion holes 5 are correspondingly circular, double 8-shaped, triangular or pentagram-shaped.

Referring to fig. 1-3-4, as a preferred embodiment, the injection-molded keypad 3 is made of a flexible material, such as a transparent plastic, or composite material, preferably a TPU or TPE soft plastic material. The key base 31 and the key hole 4 are circular, rectangular or other shapes. One end of the injection key board 3 provided with the keys is embedded in the inner wall of the key area, and the other end of the injection key board 3 is embedded in the back 22 of the injection display window 2 of the first shell injection molding assembly of the display window. As shown in fig. 3, as a preferred embodiment, the combination portion of the injection molding key board 3 and the key area of the injection molding casing 1 is a concave-convex embedded structure, so as to increase the combination area and the combination force of the two, further improve the sealing effect, and solve the problems that the failure is easy to occur when the key is pressed for many times or under an overlarge stress, the water seeps into the injection molding casing at the key position, and the tooth flushing device is abnormal or even damaged. The coverage bonding area of the injection molding key board 3 and the injection molding shell 1 can be further increased or reduced according to the actual situation.

As shown in fig. 4, as a more preferred embodiment, the injection molding key board 3 wraps the injection molding display window 2 between the injection molding key board 3 and the injection molding casing 1, so that the display surface and the back surface 22 of the injection molding display window 2 are respectively and correspondingly injected with the injection molding casing 1 and the embedding hole 5, and the injection molding key board 3, thereby realizing double sealing between the display area of the injection molding casing 1 and the injection molding display window 2, and solving the problems of sealing failure and easy leakage at the position of the display window.

Referring to fig. 5, as a preferred embodiment, the injection molding key board 3 is further provided with a plurality of hollow structures 23, so that the injection molding key board 3 is wrapped by the injection molding display window 2 and the injection molding casing 1 during the injection molding process with the first casing injection molding assembly, the bonding force and the sealing effect of the two are increased, and the problems that the key position is easy to lose efficacy and break away under the condition that the key is pressed for many times or the stress is too large, water seepage can occur into the machine body, and the tooth flushing device product is abnormal or even damaged are solved.

The invention also provides a tooth flushing device which comprises an electric device, an output end connected with the electric device, a key, a display screen and the shell injection molding structure, wherein the electric device is arranged in the second shell injection molding assembly, the output end extends out of an opening of the injection molding shell 1 of the second shell injection molding assembly, the key is arranged on the key seat 31, and the display screen is arranged on the display window.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The shell injection structure comprises an injection molding shell, an injection molding display window and an injection molding key board, and is characterized in that:

the injection molding shell and the injection molding display window are subjected to first injection molding, so that a display surface of the injection molding display window is embedded in the inner wall of the display area to form a first shell injection molding assembly;

the first shell injection molding assembly and the injection molding assembly key board are subjected to secondary injection molding, so that at least one key seat of the injection molding key board extends into the key hole, and the injection molding key board is embedded in the inner wall of the first shell injection molding assembly to form a second shell injection molding assembly.

2. The housing injection molding structure of claim 1, wherein:

the display area is provided with a plurality of embedding holes; when the injection molding is carried out for the first time, the plurality of bulges of the injection molding display window are correspondingly embedded into the embedding holes.

3. A casing injection molding structure according to claim 1, wherein one end of the injection molding key sheet is fitted to an inner wall of the key region, and the other end of the injection molding key sheet is fitted to a back surface of an injection molding display window of the first casing injection molding component of the display window.

4. The injection molding structure of the casing according to claim 2, wherein the injection molding key sheet further comprises a plurality of hollowed-out structures.

5. The injection molded housing structure of claim 3, wherein the injection molded key sheet encases the injection molded display window between the injection molded key sheet and the injection molded housing.

6. The injection molded housing structure of claim 2 wherein said protrusion and said insert hole have corresponding circular, double 8, triangular or pentagram cross-sections.

7. The injection-molded case structure according to claim 3, wherein the coupling portion of the injection-molded key sheet and the key region has a concave-convex fitting structure.

8. The housing injection molding structure of any one of claims 1 to 6, wherein: the display area of the injection molding shell is made of a light-transmitting material; the injection molding key board is made of flexible materials.

9. The housing injection molding structure of any one of claims 1 to 6, wherein: the key seat and the key hole are in a corresponding circle shape.

10. The tooth flushing device comprises an electric device, an output end connected with the electric device, at least one key and a display screen, and is characterized by comprising the shell injection molding structure as claimed in any one of claims 1 to 9, wherein the electric device is installed inside the second shell injection molding assembly, the output end extends out of an opening of an injection molding shell of the second shell injection molding assembly, the key is installed on the key seat, and the display screen is installed on the display window.