JP5998107B2 - Mold device for manufacturing earpick and body cleaning tool such as earpick and method for manufacturing the cleaning tool - Google Patents

Description

  The present invention relates to an earpick, and more specifically, an earpick that can reliably scrape ear wax without damaging the ear canal, a mold apparatus for manufacturing a body cleaning tool such as the earpick, and a method for manufacturing the cleaning tool. About.

  Conventionally, earpicks have been widely used in which the tips of elongated wooden sticks are formed into a spatula shape. However, since such a conventional earpick has a hard tip, when the earwax is scraped off, the ear canal may be damaged.

In view of such a problem, an earpick has been proposed in which a tip portion for scraping earwax is formed of a soft material.
For example, in Patent Document 1, a bottomed cylindrical elastic for scraping earwax, which is attached to a small-diameter shaft portion provided on the distal end side of a holding rod member and has a plurality of substantially circular hook-shaped projections in the axial direction. In the ear-scraper having a body, the elastic body is composed of a set of three or more types having different hardnesses and changing colors according to the hardnesses. An earpick characterized by being capable of being attached to and detached from the small-diameter shaft portion is disclosed.

This ear scraper is excellent in that it is difficult to damage the ear canal because the tip portion for scraping off the earwax is made of an elastic body (elastic rubber).
However, in this ear-scraper, a plurality of substantially round-shaped protrusions provided in the axial direction all have the same shape (outer shape), so ear wax that could not be scraped off by the tip protrusions can be scraped off by other protrusions. In many cases, it was difficult to sufficiently remove the earwax in the ear canal.
Further, although the protrusion is formed of an elastic body, it cannot be greatly deformed and deformed in shape. Therefore, in order to insert it deep into the ear canal, it is necessary to make the outer diameter of the projection small. However, if the outer diameter is made small, the ear wax cannot be scraped sufficiently.

Japanese Patent No. 4201306

  The present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to reliably scrape the earwax deep in the ear canal without damaging the ear canal. It is an object of the present invention to provide a mold apparatus and a manufacturing method capable of efficiently manufacturing a cleaning tool that removes unnecessary items generated from the body such as an earpick and an interdental brush.

  The invention according to claim 1 is composed of a rod-shaped gripping part gripped by a user, and a scraping part that is provided at the tip of the gripping part and scrapes off the earwax, the scraping part being the gripping part. And a plurality of hook-shaped portions provided at intervals in the length direction, and the hook-shaped portion on the distal end side is the flange on the proximal end side. The present invention relates to an earpick characterized by being easily bent and deformed as compared to a shape portion.

  According to a second aspect of the present invention, the flange-shaped portion on the distal end side is formed with a larger diameter than the flange-shaped portion on the proximal end side, and the surface on the distal end side is a convex surface. 2. The earpick according to claim 1, wherein the end-side surfaces are respectively formed as concave surfaces.

  According to a third aspect of the present invention, three or more hook-shaped portions are provided at intervals in the length direction, and each of the hook-shaped portions has an outer diameter gradually from the distal end side toward the proximal end side. 3. The at least two flange-shaped portions on the distal end side are formed to have a convex surface on the distal end side and a concave surface on the proximal end side, respectively. Regarding the earpick described.

  The invention according to claim 4 is characterized in that, in the flange-like portion, the radius of curvature of the convex surface which is the surface on the distal end side gradually decreases from the distal end side toward the proximal end side. The earpick according to claim 3.

  According to a fifth aspect of the present invention, the gripping portion has two large-diameter portions provided at intervals in the length direction, and a small-diameter portion provided between the two large-diameter portions. The large-diameter portion is formed in a hexagonal cross section, and the small-diameter portion is formed in a curved surface gradually narrowing toward the central portion in the length direction. It relates to the earpick described in Crab.

  The invention according to claim 6 includes a cavity mold that molds one surface of the molded product, and a core mold that is disposed to face the cavity mold, and the cavity mold includes a primary cavity mold and a secondary cavity mold. And forming a primary molded part by clamping the primary cavity mold and the core mold, and performing secondary molding on the surface of the primary molded part by clamping the secondary cavity mold and the core mold. A mold apparatus for two-color molding that molds a secondary molded product having a portion, wherein the core mold is in contact with and separated from a core body having a recess, and a recess in the core body. The slide insert that forms one side of the primary molding cavity together with the core main body, and the one side of the secondary molding cavity together with the core main body that is inserted into the recess of the core main body as the slide insert separates And a back core to be formed, wherein the separation of the slide nest with respect to the recess and the insertion of the back core are interlocked with the mold opening of the primary cabdy mold and the core mold. About.

  The invention according to claim 7 is a method of manufacturing a cleaning tool for removing unnecessary matter generated from the body using the mold apparatus according to claim 6, wherein the mold is clamped between the primary cavity mold and the core mold. Then, the primary cavity mold and the core mold are opened, and the slide nest is separated from the concave portion of the core body, and the back core is moved along with the separation. Is inserted into the recess of the core body to form one surface side of the secondary molding cavity together with the core body, and then the surface of the primary molding part is clamped between the secondary cavity mold and the core mold. The present invention relates to a manufacturing method characterized by forming a secondary molded product having a secondary molded part.

According to the invention according to claim 1, it is composed of a rod-shaped gripping part gripped by the user, and a scraping part that is provided at the tip of the gripping part and scrapes off the earwax, Since the flexible material is softer than the grip portion, the scraping portion can be bent and deformed in the ear canal during use. Therefore, it is possible to scrape the earwax without damaging the ear canal.
In addition, it has a plurality of hook-shaped portions provided at intervals in the length direction, and the hook-shaped portion on the distal end side is more easily bent and deformed than the hook-shaped portion on the proximal end side. The hook-shaped part at the base can be greatly bent and softly scraped, and the hook-shaped part at the base end side can be scraped firmly without being bent. Therefore, the earwax that could not be scraped off by the hook-shaped portion on the distal end side can be surely scraped off by the hook-shaped portion on the proximal end side.
Further, since the hook-shaped portion on the distal end side is more easily bent than the hook-shaped portion on the proximal end side, the hook-shaped portion can be inserted into the back of the ear while being greatly deformed. Therefore, it is possible to reliably scrape even the earwax behind the ear without damaging the ear canal.

According to the second aspect of the present invention, the hook-like portion on the distal end side is formed with a larger diameter than the hook-like portion on the proximal end side. , You can reliably scrape the earwax behind the ears.
In addition, since the hook-shaped portion on the distal end side is formed with a convex surface on the distal end side and a concave surface on the proximal end side, the outer diameter is reduced when inserted into the ear canal. Since it bends and deforms so as to be small, it is easy to insert, and when it is removed from the ear canal, the outer diameter increases, so that the earwax can be reliably scraped off. Moreover, since ear wax can be collected and removed from the concave surface portion, ear wax does not remain in the ear canal.

According to the third aspect of the present invention, three or more hook-shaped portions are provided at intervals in the length direction, and each hook-shaped portion is gradually removed from the distal end side toward the proximal end side. Since the diameter is small and at least two flanges on the distal end side are formed with a convex surface on the distal side and a concave surface on the proximal side, respectively, At least two bowl-shaped parts can exhibit an excellent earwax scraping function.
That is, of the at least two hook-like parts on the distal end side, the hook-like part on the more distal side has a larger diameter, the hook-like part on the more proximal side has a smaller diameter, and both hook-like parts are convex. Since it has a convex surface and a concave surface, the larger diameter bowl-shaped part on the distal end side is bent and deformed, so that the ear wax behind the ear canal can be surely scraped and more proximal Similarly, the small-diameter bowl-shaped portion on the side is flexed and deformed, so that ear wax that cannot be scraped off by the large-diameter bowl-shaped portion can be scraped off.
Also, in general, the ear canal is often narrowed and then widened toward the back, so scrape away the ear wax at the deeper part with a large-diameter bowl at the tip side. It is possible to scrape off the earwax of the narrowed portion with the small-diameter bowl-like portion on the proximal end side.

  According to the invention of claim 4, the radius of curvature of the convex surface, which is the surface on the distal end side, gradually decreases from the distal end side toward the proximal end side. Since the outer peripheral edge portion has a sharper angle toward the tip side, the function of scraping off the ear wax becomes higher. Moreover, since the outer peripheral edge part becomes obtuse as the flange part of the base end part which is not easily bent and deformed, the ear hole is hardly damaged.

  According to the invention which concerns on Claim 5, the said holding | grip part has two large diameter parts provided at intervals in the length direction, and a small diameter part provided between two large diameter parts. The small-diameter portion is formed in a curved surface that gradually narrows toward the central portion in the length direction, so that, in use, by gripping with a finger along the curved surface of the small-diameter portion during use It is easy to hold and can be held firmly. Moreover, since the large-diameter portion is formed in a hexagonal cross section, it is easy to hold even when the large-diameter portion is gripped and is difficult to roll when placed.

  According to the invention of claim 6, the core mold has a core main body having a concave portion, and one side of the primary molding cavity together with the core main body at the time of contact with and away from the concave portion of the core main body. And a back core that is inserted into the recess of the core body as the slide insert separates and forms one surface side of the secondary molding cavity together with the core body. The separation of the slide nest and the insertion of the back core are interlocked with the mold opening of the primary cavities mold and the core mold, so that the core mold is primary molded with the mold opening operation after the primary molding. The configuration for the secondary molding can be changed to the configuration for secondary molding. Therefore, a molded product having a primary molded portion and a secondary molded portion can be efficiently manufactured.

  According to the invention of claim 7, a primary molding part is molded by clamping the primary cavity mold and the core mold, and then the primary cavity mold and the core mold are opened, The slide insert is separated from the concave portion of the core body, and the back core is inserted into the concave portion of the core body along with the separation to form one side of a secondary molding cavity together with the core body, In accordance with the mold opening operation after the primary molding by molding a secondary molded product having a secondary molded part on the surface of the primary molded part by clamping the secondary cavity mold and the core mold. The core mold can be changed from the primary molding configuration to the secondary molding configuration. Therefore, a molded product having a primary molded portion and a secondary molded portion can be efficiently manufactured.

It is a front view of the earpick which concerns on this invention. It is a top view of the earpick which concerns on this invention. It is a bottom view of the earpick which concerns on this invention. It is a right view of the earpick which concerns on this invention. It is an AA line expanded sectional view of FIG. It is the BB section enlarged view of FIG. It is a front side perspective view of the earpick which concerns on this invention. It is a bottom side perspective view of an earpick according to the present invention. It is a partial expansion perspective view which shows the state which the hook-shaped part has bent and deformed in the use condition. It is a partial expansion perspective view which shows the state which the hook-shaped part has further bent and deformed in the use condition. It is a figure which shows the state of the hook-shaped part when inserting in an ear hole (a), and extracting from an ear hole (b). (A) It is sectional drawing which shows the whole structure of the metal mold | die apparatus based on this invention, The state at the time of primary shaping | molding is shown in the right half, and the state at the time of secondary shaping | molding is shown in the left half. (B) It is a figure which shows the state of the core type | mold lower part at the time of primary shaping | molding. (C) It is a figure which shows the state of the core type lower part at the time of secondary shaping | molding. It is a perspective view of the primary cavity type | mold of the metal mold apparatus which concerns on this invention. It is a perspective view of the secondary cavity type | mold of the metal mold | die apparatus which concerns on this invention. It is a perspective view of the nest | insert for secondary molds of the metal mold | die apparatus which concerns on this invention. It is a perspective view of the core main body of one side among a pair of core main bodies which form the core main body of the metal mold | die apparatus which concerns on this invention. It is a perspective view of the slide nest of the metallic mold device concerning the present invention. It is a perspective view of the back core of the metallic mold apparatus concerning the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an earpick according to the present invention will be described with reference to the drawings as appropriate.
1 is a front view of an earpick according to the present invention, FIG. 2 is a plan view of the earpick according to the present invention, FIG. 3 is a bottom view of the earpick according to the present invention, and FIG. 4 is a right side view of the earpick according to the present invention. 5 is an enlarged sectional view taken along the line AA in FIG. 1, FIG. 6 is an enlarged view of the BB portion in FIG. 1, FIG. 7 is a front perspective view of the earpick according to the present invention, and FIG. It is a side perspective view.

  The earpick according to the present invention includes a rod-shaped gripping part (1) gripped by a user and a scraping part (2) that is provided at the tip of the gripping part (1) and scrapes off the earwax.

  The gripping portion (1) includes two large diameter portions (3) provided at intervals in the length direction, a small diameter portion (4) provided between the two large diameter portions (3), and 2 It consists of the extended part (5) further extended in the front end direction from the large diameter part of the front end side among the two large diameter parts (3).

The large-diameter portion (3) has a hexagonal cross section, and is easy to hold and does not roll.
In the large diameter portion (3), a recess (6) is formed in a portion corresponding to a hexagonal corner (see FIG. 6 and the like). The depression (6) can exert a function of preventing slip when gripped by a finger.

  The small-diameter portion (4) provided between the two large-diameter portions (3) is formed in a curved surface shape that gradually narrows toward the central portion in the length direction. Accordingly, the grip portion (1) can be firmly gripped by gripping the finger surface along the curved surface portion where the small diameter portion (4) is narrowed.

The scraping part (2) is made of a flexible material that is softer than the gripping part (1).
As the material of the gripping part (1), for example, a thermoplastic resin such as polyethylene or polypropylene, particularly polypropylene is preferably used. As a material of the scraping portion (2), for example, an elastomer, particularly a thermoplastic elastomer (TPE) is preferably used.
Thus, since the scraping part (2) is made of a flexible material softer than the gripping part (1), the ear canal is not damaged during use.

The scraping part (2) has a plurality of substantially disk-shaped bowl-shaped parts (7) provided at intervals in the length direction.
Although the number of hook-shaped parts (7) is not specifically limited, At least 2, Preferably three or more are provided. In the illustrated example, three hook-shaped portions (7) are provided.
As shown in FIG. 5 and the like, the three bowl-shaped portions (7) have gradually decreasing outer diameters from the distal end side toward the proximal end side. The most distal ridge (71) has the largest outer diameter, the most proximal ridge (73) has the smallest outer diameter, and the intermediate ridge (72) has a ridge ( 71) which is smaller than the collar (73) and smaller in outer diameter.

As shown in FIG. 5, the most distal flange portion (71) and the flange portion (72) at the intermediate position have a distal surface on a convex surface (convex curved surface) and a proximal end. The side surfaces are respectively formed as concave surfaces (concave curved surfaces). In the most proximal side flange-like portion (73), the proximal side surface is a flat surface and is not a concave surface. By providing the concave surface, the bowl-shaped portion becomes thin and is easily bent and deformed. Moreover, it becomes easy to bend and deform, so that an outer diameter is large.
Thereby, compared with the hook-like part (73) in the base end side, the hook-like part (71) and the hook-like part (72) on the distal end side are more easily bent and deformed. Further, the hook-like part (71) on the distal end side is more easily bent and deformed than the hook-like part (72).

9 and 10 are partially enlarged perspective views showing a state where the hook-shaped portion is bent and deformed in the usage state of the earpick according to the present invention.
As shown in the drawing, the flanges (71) and (72) on the distal end side are greatly bent and deformed compared to the flange (73) on the proximal end side. In the state of FIG. 9, the hook-shaped parts (71), (72) are deformed, and in the state of FIG. 10, the hook-shaped parts (71), (72), (73) are deformed.
As a result, the hook-like portions (71) and (72) on the distal end side can be greatly bent and softly scraped, and the hook-like portion (73) on the proximal end side can be scraped firmly without being bent so much. Therefore, the earwax that has not been scraped off by the hook-like portions (71) (72) on the distal end side can be reliably scraped off by the hook-like portion (73) on the proximal end side.

Further, the hook-like portions (71) (72) on the distal end side are inserted into the ear canal because the distal end surface is formed into a convex surface and the proximal end surface is formed into a concave surface. At the time (indicated by a thick black arrow in the insertion direction), it bends and deforms so that the outer diameter becomes smaller (see FIG. 11A). Therefore, it can be easily inserted into the ear canal. Further, since the hook-like portion (71) on the distal end side is most easily bent and deformed, the hook-like portion (71) can be inserted into the back of the ear while being greatly bent and deformed. Therefore, it is possible to reliably scrape even the earwax behind the ear without damaging the ear canal.
On the other hand, when removing from the ear hole (the removal direction is indicated by a thick black arrow), the outer diameter increases (see FIG. 11B). Therefore, ear wax can be surely scraped off. Moreover, since ear wax can be collected and removed from the concave surface portion, ear wax does not remain in the ear canal. When scraping off the earwax, the hook-shaped portion is further deformed as shown in FIG. 10 from the state shown in FIG.
Also, in general, the ear canal is often narrowed and then widened toward the back, so scrape away the ear wax at the deeper part with a large-diameter bowl at the tip side. It is possible to scrape off the earwax of the narrowed portion with the small-diameter bowl-like portion on the proximal end side.

The three ridges (7) have gradually decreasing radii of curvature of convex surfaces (convex curved surfaces) that are surfaces on the distal end side from the distal end toward the proximal end. The most distal ridge (71) has the largest radius of curvature, the most proximal ridge (73) has the smallest radius of curvature, and the intermediate ridge (72) has a ridge ( 71) and a radius of curvature smaller than that of the bowl-shaped portion (73).
Thereby, since the outer peripheral edge becomes sharper as the hook-shaped part on the distal end side, the function of scraping ear wax becomes higher. Moreover, since the outer peripheral edge part becomes obtuse as the flange part of the base end part which is not easily bent and deformed, the ear hole is hardly damaged.

  As shown in FIG. 5, the scraping portion (2) has a hollow cylindrical shape with the distal end portion closed and the proximal end portion opened, and the extending portion (5) of the gripping portion (1) is formed in the hollow portion. The grip part (1) and the scraping part (2) are integrated by fitting the thinnest tip part (51).

  Next, a mold apparatus and a manufacturing method according to the present invention will be described. Although the earpick according to the present invention can be manufactured by the mold apparatus and the manufacturing method according to the present invention, the object of manufacture is not limited to the earpick, and a cleaning tool that removes unnecessary matter generated from the body such as an interdental brush. It can also be used as a mold apparatus and a manufacturing method for manufacturing.

  The gripping part (1) and the scraping part (2) are integrally formed by two-color molding (double mold). Specifically, it can be molded by the following method.

  FIG. 12A is a cross-sectional view showing the entire configuration of the mold apparatus according to the present invention, in which the state at the time of primary molding is shown in the right half and the state at the time of secondary molding is shown in the left half. (B) It is a figure which shows the state of the core type | mold lower part at the time of primary shaping | molding. (C) It is a figure which shows the state of the core type lower part at the time of secondary shaping | molding. FIG. 13 is a perspective view of the primary cavity mold of the mold apparatus according to the present invention. FIG. 14 is a perspective view of a secondary cavity mold of the mold apparatus according to the present invention. FIG. 15 is a perspective view of a secondary cabinet nest of the mold apparatus according to the present invention. FIG. 16 is a perspective view of one core body of a pair of core bodies forming the core body of the mold apparatus according to the present invention. FIG. 17 is a perspective view of a slide insert of the mold apparatus according to the present invention. FIG. 18 is a perspective view of the back core of the mold apparatus according to the present invention.

  The mold apparatus according to the present invention includes a cavity mold (8) for molding one surface of a molded product, and a core mold (9) disposed to face the cavity mold (8). The cavity mold (8) includes a primary cavity mold (81) and a secondary cavity mold (82), and the core mold (9) is a core body (91) disposed to face the primary cavity mold (81). And a core body (91) disposed opposite to the secondary cavity mold (82).

As shown in FIG. 13, the primary cavity mold (81) includes a primary molding cavity (83) on the lower surface in FIG. In the following description, terms such as “upper surface”, “lower surface”, “upward direction”, “downward direction”, “leftward direction”, “rightward direction”, “left / rightward direction”, and “lateral direction” have no notice. As far as the direction in FIG. 12 is concerned.
On the other hand, as shown in FIG. 14, the secondary cavity mold (82) includes a through hole (84) penetrating the upper surface and the lower surface at a position corresponding to the secondary molded portion, and the through hole (84) , A secondary cabinet insert (85) (see FIG. 15) in which a secondary molding cavity (86) is formed on the lower surface is inserted and arranged.

  The core mold (9) includes a pair of core bodies (91) having a primary molding cavity (93) formed on the upper surface and having a recess (92) on a side surface corresponding to the primary molding cavity (93). ) (See FIG. 16), a slide insert (94) (see FIG. 17), and a back core (96) (see FIG. 18). One core body (91) is provided for each of the primary cavity mold (81) and the secondary cavity mold (82).

  A molding material is supplied from the hopper (10), and is formed between the primary cavity mold (81) and the core body (91) by clamping the primary cavity mold (81) and the core body (91). Resin is injected into the primary molding cavity to mold the primary molding part. The earpick gripping part (1) according to the present invention corresponds to a primary molding part. At this time, as shown in the right half of FIG. 12 (a), the slide nest (94) is in contact with the recess (92) of the core body (91) when the mold is clamped during the primary molding. The primary molding cavity (95) formed on the upper surface of (94) forms one side of the primary molding cavity together with the primary molding cavity (93) of the core body (91). At this point, the secondary molded portion (corresponding to the ear-scraping scraping portion (2) according to the present invention) is not molded.

  Next, the cavity mold (8) and the core mold (9) are opened, and the core mold (9) is rotated by 180 ° about the axis L in FIG. The core main body (91) and the secondary cavity mold (82) including the other core main body (91) and the primary cavity mold (81) are opposed to each other. When the mold is opened, the slide nest (94) is guided by the angular pin (12) incorporated in the die incorporation plate (11) and is slid to the right, thereby the recess (92). ) In the lateral direction.

The lower part of the core mold (9) is provided with an upper plate (98) having an upper block (981) and a lower plate (99) having a lower block (991), and the upper plate (98). Is in contact with the lower surface of the back core (96). During the primary molding, the upper block (981) and the lower block (991) are in contact with each other on the inclined surfaces (see FIG. 12B). An air cylinder (not shown) is connected to the lower plate (99) via the block (13), so that the lower plate (99) can slide in the left-right direction. It is configured.
When the cavity mold (8) and the core mold (9) are opened, as described above, the slide insert (94) slides away from the recess (91) by the action of the angular pin (12). At the same time, the upper block (981) and the lower block (991) slide on the inclined surfaces by sliding the lower plate (99) in the left direction of FIG. Thus, the lower surface of the upper block (981) and the upper surface of the lower block (991) come into contact with each other (see FIG. 12C). As a result, the upper plate (98) moves upward. When the upper plate (98) is moved upward, the back core (96) of the core mold (9) is also moved upward and inserted into the recess (92) of the core body (91). A secondary molding cavity (97) is formed on the upper surface of the back core (96) (see FIG. 18), and the back core (96) is inserted into the recess (92) of the core body (91). Thus, one side of the secondary molding cavity is formed together with the core body (91) (see the left half of FIG. 12A).

  Next, in the secondary molding cavity formed between the secondary cavity mold (82) and the secondary mold insert (85), and the core mold (9) and the back core (96), the primary molded portion is formed. Another molten resin different from the above material is injected to form a secondary molding portion (scraping portion (2)) on the surface of the molded resin. Finally, the secondary cavity mold (82) and the core mold (9) are opened, and the finished product is taken out. As a result, a molded product having a primary molded part and a secondary molded part and covered with a part of the surface of the primary molded part by the secondary molded part (unnecessary items generated from the body such as an earpick and an interdental brush). The cleaning tool to be removed) can be manufactured efficiently.

  The earpick according to the present invention is suitably used as an earpick that can reliably scrape the earwax in the back of the ear canal without damaging the ear canal, and is also used as a cleaning tool for nasal cleaning. In addition, the mold apparatus and the manufacturing method according to the present invention are suitably used for manufacturing a cleaning tool that removes unnecessary items generated from the body such as an earpick and an interdental brush.

DESCRIPTION OF SYMBOLS 1 Gripping part 2 Scraping part 3 Large diameter part 4 Small diameter part 5 Extension part 6 Indentation 7, 71, 72, 73 Cage-like part 8 Cavity type 81 Primary cavity type 82 Secondary cavity type 85 Nest 9 for secondary mold Core mold 91 Core body 92 Recess 94 Slide insert 96 Back core

Claims (6)

It consists of a rod-shaped gripping part gripped by the user, and a scraping part that is provided at the tip of this gripping part and scrapes off the earwax,
The scraping portion is made of a flexible material that is softer than the gripping portion, and has a plurality of hook-like portions provided at intervals in the length direction, and has a hook-like shape on the tip side. parts are rather easily resiliently deformed in comparison with the flange portion on the proximal side,
The flange portion on the distal end side is formed with a larger diameter than the flange portion on the proximal end side, the distal end surface is a convex surface, and the proximal end surface is a concave surface. Each earpick is characterized by being formed. Three or more hook-shaped portions are provided at intervals in the length direction, and each hook-shaped portion gradually decreases in outer diameter from the distal end side toward the proximal end side, 2. The earpick according to claim 1 , wherein at least two hook-shaped portions are formed such that a front surface is a convex surface and a proximal surface is a concave surface. The earpick according to claim 2, wherein the curvature radius of the convex surface, which is a surface on the distal end side, gradually decreases from the distal end side toward the proximal end side. The grip portion has two large diameter portions provided at intervals in the length direction, and a small diameter portion provided between the two large diameter portions,
The said large diameter part is formed in the cross-sectional hexagonal shape, The said small diameter part is formed in the curved surface shape which becomes thin gradually toward the center part of a length direction, The one of Claim 1 thru | or 3 characterized by the above-mentioned. Earpick as described in A cavity mold for molding one surface of the molded product, and a core mold disposed opposite to the cavity mold,
The cavity mold includes a primary cavity mold and a secondary cavity mold,
A primary molded part is molded by clamping the primary cavity mold and the core mold, and a secondary molded part is formed on the surface of the primary molded part by clamping the secondary cavity mold and the core mold. A mold apparatus for two-color molding that molds a secondary molded product,
The core mold includes a core main body having a concave portion, a slide nest that makes contact with and separates from the concave portion of the core main body and forms one surface side of the primary molding cavity together with the core main body at the time of contact, and the slide A back core that is inserted into the recess of the core body along with the separation of the nest and forms one side of the secondary molding cavity together with the core body, and
Separation of the slide nest with respect to the recess and insertion of the back core are interlocked with mold opening of the primary cabdy mold and the core mold.
The earpick mold apparatus according to any one of claims 1 to 4, wherein: A method of manufacturing a cleaning tool for removing unnecessary materials generated from a body using the mold apparatus according to claim 5 ,
A primary molding part is formed by clamping the primary cavity mold and the core mold,
Next, the primary cavity mold and the core mold are opened, the slide nest is separated from the recess of the core body, and the back core is inserted into the recess of the core body along with the separation. And forming one side of the secondary molding cavity together with the core body,
Next, a secondary molded product having a secondary molded part on the surface of the primary molded part is molded by clamping the secondary cavity mold and the core mold,
A manufacturing method characterized by the above.