TWI797972B - Earmuffs and manufacturing method thereof - Google Patents

Abstract

The manufacturing method of the earmuffs of the present invention includes: using an extension post to preform a conical surface with a top surface in the center of an earmuff film, and the thickness of the top surface is the same as the thickness of the conical surface; Move in an extension direction to extend the earmuff membrane, and an extension height of the earmuff membrane is higher than the height of an ear thermometer probe; and move the extension column in the opposite direction of the extension, so that the earmuff The central rebound of the film makes the height of the top surface of the earmuff film less than the extended height.

Description

Earmuffs and manufacturing method thereof

The present invention relates to an earmuff and a manufacturing method thereof; in particular, the present invention is an extended earmuff that uses a PE film to be pressurized and plastically deformed and extended and a manufacturing method thereof.

Earmuffs are an important tool for ear thermometers to prevent cross-infection, but the design and production methods of earmuffs have not changed much. PE film is used as the main material of the earmuffs, mainly because of its high infrared transmittance. With modern mass production engineering, it is possible to make a film with a relatively small variation in film thickness tolerance, and the variation in infrared transmittance is relatively small. Therefore, it is very suitable for the application of earmuffs on ear thermometers.

According to the prior art disclosed in US Patent No. 5163418, PE film is used to directly assemble the shape of the earmuff probe. The disadvantage is that the sides of the entire earmuffs are wrinkled. Although the folds are neat, the relatively fluffy earmuffs will make consumers feel uncomfortable when they are inserted into the ear canal.

Afterwards, the development of the manufacturing process of thin-film earmuffs was divided into two categories. The first category is thin-film earmuffs that can be extended in small quantities, and consumers must make their own extensions, as shown in US Patent No. 4,993,424 and Chinese Patent No. 1,483,386. However, the amount of extension is designed to be relatively small, and there are even no extension earmuffs, so that consumers must extend themselves when using the earmuffs, which also leads to the risk of breaking the earmuff extensions when consumers operate. The second category is fully extended film earmuffs, as shown in the Republic of China Announcement No. 378751 New Patent, Announcement No. 538238, and Publication No. 200742838 Invention Patent. Among them, 2/3 of the earmuffs disclosed in the new patent No. 378751 are in a naturally folded state, and only 1/3 are in an extended state. Therefore, when the ear thermometer is inserted into the ear canal, the earmuffs will still be troubled by abnormal sounds. .

The manufacturing process of the above two types of earmuffs shown in the prior art starts to be extended when the film is in a flat state, but the area reserved at the top is different. Please refer to Figure 1A to Figure 1C, which show the schematic diagram of the conventional earmuff extension process. The column 3 rises and the earmuff film 4 is extended and molded into an earmuff, wherein the conical surface b of the formed earmuff is stretched out by pressurized plastic deformation, so that the thickness of the conical surface b between the top surface a and the annular surface c is smaller than that of the top surface a. The thickness of surface a and annular surface c. Although there is a large top area reserved, which can reduce the risk of misalignment for consumers, but because the conical surface b is fully extended from the flat state, it is easy to cause some defective rates of film rupture and strain during the production process. Instead, full manual visual inspection is required. If the earmuffs with slightly damaged membranes are not detected immediately, it will lead to the risk of deviation in the measurement of consumers.

If the invention can improve the manufacturing process and reduce the rupture of the film, an earmuff and a manufacturing method thereof will contribute to industrial practicability.

The purpose of the present invention is to provide an earmuff and its manufacturing method which improves the manufacturing process, reduces the cracking of the extension film, improves the yield rate, and reduces the quality control inspection.

The ear muff of the present invention has a top surface, an annular surface and a conical surface between the top surface and the annular surface, wherein the thickness of the lower end of the conical surface is greater than the thickness of the upper end of the conical surface.

In the earmuffs of the present invention, the thickness of the lower conical surface of the conical surface is the same as that of the annular surface; the thickness of the lower conical surface of the conical surface is the same as the thickness of the top surface; and the area of the lower conical surface of the conical surface Smaller than the area of the upper conical surface of the conical surface.

The manufacturing method of the earmuffs of the present invention includes: using an extension post to preform a conical surface with a top surface in the center of an earmuff film, and the thickness of the top surface is the same as the thickness of the conical surface; Move in an extension direction to extend the earmuff membrane, and an extension height of the earmuff membrane is higher than the height of an ear thermometer probe; and move the extension column in the opposite direction of the extension, so that the earmuff The central rebound of the film makes the height of the top surface of the earmuff film less than the extended height.

The thickness of the lower end of the earmuffs manufactured according to the manufacturing method of the present invention is greater than that of the upper end on the conical surface formed by extension, so that film rupture and strain are less likely to occur during the production process, thereby improving the yield rate and reducing quality control inspections.

Please refer to Figure 2, which shows the manufacturing flow chart of the earmuffs of the present invention, together with the schematic diagrams of the earmuffs extension process of the present invention shown in Figures 3 to 6. In one embodiment of the present invention, the manufacturing method of the earmuffs of the present invention comprises the following steps:

Step 11: Before the upper pressure ring 1 and the lower pressure ring 2 clamp and press the earmuff membrane 4, the extension column 3 protrudes from the center of the lower pressure ring 2 to a predetermined height, as shown in the third figure. The preset height is the upper surface of the lower pressure ring 2 as a reference plane P, which passes through the center of the lower pressure ring 2 along an extended direction and exceeds a preset height of the reference plane P by about 3-6 mm.

Step 12: Place the earmuff film 4 for forming an earmuff between the upper pressure ring 1 and the lower pressure ring 2, and the earmuff film 4 is located above the extension post 3, wherein the earmuff film 4 is relatively Preferably it is a PE film.

Step 13: Fix the extension column 3 and the lower pressure ring 2 and lower the upper pressure ring 1, so that the upper and lower pressure rings 1 and 2 are pressed together with the earmuff film 4, and the pressing of the upper and lower pressure rings 1 and 2 The surface is located on the reference plane P, wherein the pressing surface of the earmuff membrane 4 by the upper and lower pressing rings 1, 2 is an annular surface c. The earmuff film 4 forms a conical surface b with a top surface a at the center of the ring of the lower pressure ring 2 by the raised height of the extended post 3 . At this time, the extension column 3 has not yet started to extend the earmuff film 4, so the thicknesses extending radially from the top surface a to the conical surface b to the annular surface c are all equal, as shown in the fourth figure.

Step 14: Move the extension column 3 in an extension direction to extend the earmuff membrane 4 in the lower pressure ring 2, wherein the extension direction is an upward direction as shown in FIG. 5 . When the extension column 3 is moved in the extension direction to extend the earmuff film 4, the thickness of the lower conical surface b2 of the conical surface b will not be thinned and the extension height D1 of the extension column 3 must be higher than an ear temperature. The height of the gun probe. Therefore, in step 11, the preset height of the extension column beyond the reference plane P must make the conical surface b formed in step 13 sufficient to make the extension height D1 of the extension column 3 exceed the height of the ear thermometer probe by about 3-8 mm, and not cause this The thickness of the lower end tapered surface b2 becomes thinner. The thickness of the upper conical surface b1 is smaller than the thickness of the lower conical surface b2, and the thickness of the top surface a, the lower conical surface b2 and the annular surface c are all equal.

Step 15: Move the extension column 3 in the reverse direction of the extension direction to make the extension height of the earmuff membrane 4 rebound, wherein the reverse direction of the extension direction is the downward direction shown in Figure 6. Due to the elasticity of the earmuff film 4, the extension column 3 moves down after the extension is completed, and the height of the film rebounds can be suitable for the ear thermometer. Head height. Therefore, the height D2 of the top surface of the molded earmuff is smaller than the height D1 of the earmuff film 4 extended by the extension column 3, and the area of the lower end of the conical surface b2 is smaller than the area of the upper end of the conical surface b1.

According to the manufacturing method of the earmuffs of the present invention shown in Figure 2, the molded earmuffs have a top surface a, an annular surface c, and a conical surface b between the top surface a and the annular surface c, wherein the conical surface b The thickness of the lower conical surface b2 of the conical surface b is greater than the thickness of the upper conical surface b1 of the conical surface b, and the top surface a radially extends to the upper conical surface b1 and the lower conical surface b2 of the conical surface b until the annular surface c. Wherein, the thickness of the lower conical surface b2 of the conical surface b is the same as the thickness of the annular surface c and the top surface a.

1: Upper pressure ring

2: Lower pressure ring

3: Extension column

4: Earmuff film

10: Manufacturing process

11~15: Steps

a: top surface

b: conical surface

b1: upper cone

b2: lower end cone

c: Torus

D1: extended height

D2: top surface height

P: reference plane

Figure 1A to Figure 1C are schematic diagrams of the extension process of conventional earmuffs. Figure 2 is a flow chart of the manufacture of the earmuffs of the present invention. Figure 3 is a schematic diagram of the earmuffs of the present invention before extension, where the extension column protrudes in the center of the lower pressure ring in advance. Figure 4 is a schematic diagram of the earmuffs of the present invention before extension, in which the upper and lower pressure rings press together an earmuff film, so that the center of the earmuff film preforms a conical surface with a top surface. Figure 5 is a schematic diagram of the earmuff being extended by the extension column of the present invention, wherein an extension height of the earmuff film is higher than the height of the probe of an ear thermometer. Figure 6 is a schematic diagram of the earmuffs of the present invention after extension, wherein the extension column is lowered to make the extension height of the earmuff film rebound.

10: Manufacturing process

11~15: Steps

Claims (10)

A method of manufacturing an earmuff, comprising: A conical surface with a top surface is pre-formed in the center of an earmuff film by an extension post, and the thickness of the top surface is the same as the thickness of the conical surface; moving the extension column in an extension direction to extend the earmuff membrane, and an extension height of the earmuff membrane is higher than the height of an ear thermometer probe; and Moving the extending column in the opposite direction of the extending direction allows the center of the earmuff film to rebound, so that the height of the top surface of the earmuff film is smaller than the extending height. The manufacturing method of earmuffs as described in claim 1, further comprising: First make the extension post protrude in the center of the lower pressure ring; place the earmuff film between an upper pressure ring and the lower pressure ring; and press the upper pressure ring and the lower pressure ring to make the ear The center of the sleeve film forms the conical surface with a top surface. The manufacturing method of earmuffs as described in claim 1, further comprising: When the extension column is moved in the extension direction to extend the earmuff film, the thickness of the lower end of the conical surface will not be thinned. The manufacturing method of the earmuff according to claim 1, wherein the thickness of the upper end of the conical surface is smaller than the thickness of the lower end of the conical surface. An earmuff, made according to the manufacturing method of the earmuff described in claim 1, and suitable for covering the ear thermometer probe. An earmuff has a top surface, an annular surface and a conical surface between the top surface and the annular surface, wherein the thickness of the lower conical surface of the conical surface is greater than the thickness of the upper conical surface of the conical surface. The earmuff as claimed in item 6, wherein the thickness of the lower tapered surface of the conical surface is the same as the thickness of the annular surface. The earmuff as claimed in claim 6, wherein the thickness of the lower tapered surface of the conical surface is the same as the thickness of the top surface. The earmuff according to claim 6, wherein the area of the lower end of the conical surface is smaller than the area of the upper end of the conical surface. The earmuff as claimed in item 6, wherein the top surface radially extends to the upper and lower conical surfaces of the conical surface until reaching the annular surface.

Images