Brush

Abstract

To provide a brush which is easy for a user to use while rotating around a central axis.SOLUTION: The brush 1 is a so-called roll brush having a central axis A extending in a straight line and including a brush section 10, a rotation operation section 100, and a handle section 200, and the brush section 10, the rotation operation section 100, and the handle section 200 are arranged in this order in a direction of the central axis A. The brush part 10 has a body part 20 extending along a central axis A, and brush bristles 30 extending from a front face of the body part 20 in a radial direction with respect to the central axis A. The handle part 200 has a substantially circular cross-sectional shape orthogonal to the central axis A at a portion with which the hand of the user (the balls of the middle finger, the ring finger, and the little finger, the palm of the hand on the little finger side, or the like) comes into contact when the user uses the rotational operation part 100 by pinching it with the fingertips of the thumb and the index finger, and the user can rotate the rotational operation part 100 around the central axis A while pinching it with the fingertips of the thumb and the index finger.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a brush. [Background technology]

[0002] Patent Document 1 discloses a conventional brush. This brush is a roll brush that includes a bristle-implanted portion and a grip portion. The outer surface of the grip portion has three-dimensional irregularities. This allows the grip portion to fit closely to the palm of the hand or fingertips, providing an excellent fit when the user grips the grip portion or holds it between their fingers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-151658 Summary of the Invention [Problem to be solved by the invention]

[0004] The brush in Patent Document 1 has a three-dimensional uneven outer surface of the grip, so when a user tries to rotate the brush around the central axis while holding the bristled side of the grip with their fingertips, the palm of their hand gets caught on the outer surface of the grip, making it difficult to rotate.

[0005] The present invention has been made in view of the above-mentioned conventional circumstances, and an object to be achieved is to provide a brush that is easy to use by the user as it is rotated around the central axis. [Means for solving the problem]

[0006] The brush of the present invention is A brush having a central axis extending in a straight line, and including a brush part, a rotary operation part, and a handle part, the brush part, the rotary operation part, and the handle part are arranged in this order in the direction of the central axis, The brush part is a main body portion extending along the central axis; Brush bristles extending radially from the surface of the main body with respect to the central axis; It has the handle portion has a substantially circular cross-sectional shape perpendicular to the central axis at a portion where a user's hand comes into contact when the user grips the rotation operation portion with his / her fingertips to use the rotation operation portion, The user can rotate the rotation operation unit around the central axis while holding it with his or her fingertips.

[0007] When a user grips the rotating control unit with their fingertips and rotates the brush around the rotation axis, the part of the handle with a roughly circular cross section perpendicular to the central axis touches the user's hand. This allows the brush to rotate smoothly and stably around the central axis. This makes the brush ideal for blow-drying and curling hair.

[0008] Therefore, the brush of the present invention can be easily used by the user while rotating it around the central axis. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a front view showing the brush of the first embodiment. [Figure 2] FIG. 2 is a left side view showing the brush of the first embodiment. [Figure 3] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along the arrow BB in FIG. [Figure 5] FIG. 2 is a cross-sectional view taken along the arrow CC in FIG. [Figure 6] FIG. 2 is a cross-sectional view taken along the arrow DD in FIG. [Figure 7] FIG. 2 is a cross-sectional view taken along the arrows EE in FIG. [Figure 8] FIG. 2 is a perspective view showing the main body of Example 1 before brush bristles are planted. [Figure 9] FIG. 2 is a front view showing the main body of Example 1 before brush bristles are planted. [Figure 10]FIG. 2 is a perspective view showing a cap attached to a main body of the first embodiment. [Figure 11] 3 is an enlarged view showing brush bristles planted in the main body of Example 1. FIG. [Figure 12] 3 is a perspective view showing an insertion portion of the rotation operation unit into the handle portion of the first embodiment. FIG. [Figure 13] 1 is a diagram showing a state in which a user holds a rotation operation part of the brush of Example 1 with their fingertips when using the brush. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] A preferred embodiment of the present invention will now be described.

[0011] In the brush of the present invention, the surface of the handle portion may be smoothly curved in the direction of the central axis. In this case, the surface of the handle portion that comes into contact with the user's hand when the user uses the brush by gripping the rotating control unit with their fingertips is smoothly curved in the direction of the central axis, allowing the handle portion to fit comfortably in the user's hand regardless of the size of the user's hand. Therefore, the user can use the brush by rotating it smoothly and stably around the central axis.

[0012] In the brush of the present invention, the surface material of the rotating operation part may be different from the surface material of the handle part. In this case, by increasing the surface roughness or coefficient of friction of the rotating operation part compared to the surface of the handle part, the brush becomes easier to use as the user is less likely to slip when rotating the rotating operation part around the central axis while holding it with their fingertips.

[0013] In the brush of the present invention, the end of the brush unit facing the rotating operation unit may have a wall surface that extends outward from the outer periphery of the rotating operation unit. In this case, when a user grips the rotating operation unit with their fingertips, their fingertips come into contact with the wall surface, preventing their fingertips from entering the brush unit. This allows the user to grip the rotating operation unit at an appropriate position with their fingertips and use the brush while rotating it around the central axis.

[0014] The brush of the present invention may have its center of gravity located closer to the brush head than the wall surface. In this case, when a user grips the rotating control part with their fingertips, the handle naturally touches the user's hand. This allows the user to use the brush by gripping the rotating control part with their fingertips and rotating it stably around the central axis.

[0015] Example 1 Next, a first embodiment of a brush according to the present invention will be described with reference to the drawings. Brush 1 is a so-called roll brush, as shown in Figures 1 and 3. Brush 1 has a central axis A that extends in a straight line, and includes a brush unit 10, a rotation operation unit 100, and a handle unit 200. Brush 1 is arranged in this order from one end in the direction of central axis A, with brush unit 10, rotation operation unit 100, and handle unit 200.

[0016] As shown in FIGS. 1 to 4, the brush unit 10 has a main body 20 and a plurality of brush bristles 30. In the first embodiment, "bristles 30" refers to a bundle of a plurality of pig bristles. The main body 20 is made of resin. The main body 20 has a cylindrical shape centered on a central axis A. The main body 20 extends along the central axis A. As shown in FIGS. 3 and 8, one end of the main body 20 has an annular outer peripheral wall 21 extending in the direction of the central axis A. In other words, one end of the main body 20 forms a first recess 23 recessed toward the rotary operation unit 100. A cap main body 41, which will be described later, is fitted and adhered to the first recess 23.

[0017] As shown in FIG. 8 , one end of the main body 20 forms a second recess 25 recessed toward the rotation operation unit 100 in the center of the bottom surface of the first recess 23. The cross-sectional shape of the second recess 25 perpendicular to the central axis A is substantially circular with the central axis A as its center. The second recess 25 has a protruding wall 27 at its bottom that protrudes from the inner circumferential surface of the second recess 25 in the direction of the central axis A. The protruding wall 27 is flat. The dimension of the protruding wall 27 from the inner circumferential surface of the second recess 25 to the end face on the central axis A side is approximately ¼ of the inner diameter of the second recess 25. The protruding wall 27 is used to position the main body 20 about the central axis A in a device that inserts the base ends of the brush bristles 30 into each insertion hole 24 of the main body 20, which will be described later. The other end of the main body 20 on the rotation operation unit 100 side has a wall surface 29 that extends outward from the outer periphery of the rotation operation unit 100, as shown in FIG. 3 . The wall surface 29 is annular and extends on a plane perpendicular to the central axis A.

[0018] As shown in FIG. 3, the main body 20 includes a cap 40. The cap 40 is fitted into and adhered to the first recess 23 and the second recess 25 formed at one end of the main body 20. As shown in FIG. 10, the cap 40 includes a cap body 41 and an insertion protrusion 43. The cap body 41 and the insertion protrusion 43 are made of resin and are integrally molded. The cap body 41 is disk-shaped. The outer diameter of the cap body 41 is slightly smaller than the inner diameter of the first recess 23. The surface of the cap body 41 is a curved surface with a slightly bulged center (see FIGS. 1 and 3). The surface of the cap body 41 is painted and has a glossy finish. The back surface of the cap body 41 is flat. The insertion protrusion 43 protrudes from the center of the back surface of the cap body 41. The insertion protrusion 43 is approximately cylindrical. The insertion protrusion 43 is inserted into the second recess 25. The outer diameter of the insertion convex portion 43 is slightly smaller than the inner diameter of the second recessed portion 25. The insertion convex portion 43 is formed with a notch 43A into which the protruding wall 27 of the second recessed portion 25 is inserted.

[0019] As shown in Figures 8 and 9, the main body 20 has a plurality of openings 22 formed on its outer peripheral surface. Each opening 22 is circular. The openings 22 are arranged on 16 imaginary straight lines L1 that extend parallel to the central axis A on the outer peripheral surface of the main body 20. As shown in Figure 9, the imaginary straight lines L1 are arranged parallel to each other at equal intervals in the circumferential direction on the outer peripheral surface of the main body 20. Eight openings 22 are arranged on the outer peripheral surface of the main body 20 at equal intervals on each of a plurality of imaginary identical circumferences C1 around the central axis A. The imaginary identical circumferences C1 are arranged at equal intervals in the direction of the central axis A on the outer peripheral surface of the main body 20. As shown in Figure 4, when viewed from the side of one end of the main body 20, the openings 22 arranged on two adjacent imaginary circumferences C1 in the direction of the central axis A are arranged such that the opening 22 arranged on the other imaginary circumference C1 is located at the center of an arc extending between the adjacent openings 22 arranged on one imaginary circumference C1.

[0020] 3 and 4, the main body 20 has insertion holes 24 formed in the direction of the central axis A, which are continuous with each opening 22. Each insertion hole 24 extends toward the central axis A. In other words, each insertion hole 24 extends in a radial direction of the central axis A. Each insertion hole 24 has a circular cross section perpendicular to the extending direction.

[0021] As shown in Figures 3, 4, and 11, the base end of each brush bristles 30 is inserted into and adhered to one of the insertion holes 24 formed in the main body 20. In other words, the brush bristles 30 are arranged at equal intervals on 16 imaginary straight lines L1 extending parallel to the central axis A on the outer circumferential surface of the main body 20, and are also arranged at equal intervals on multiple imaginary identical circles C1. Each brush bristles 30 extends in the direction of the insertion hole 24 into which it is inserted, i.e., radially from the central axis A. Each brush bristles 30 inserted into one insertion hole 24 is composed of 21 boar bristles bundled together. The boar bristles constituting each brush bristles 30 come in two lengths. Each brush bristles 30 is composed of 9 short boar bristles and 12 long boar bristles bundled together. The brush bristles 30 widen as they move away from the opening 22 formed on the surface of the main body 20.

[0022] As shown in FIGS. 1 and 3, the rotary operation unit 100 is continuous with the other end of the main body 20. The rotary operation unit 100 and the main body 20 of the brush unit 10 are made of resin and are molded integrally. The surface material of the rotary operation unit 100 is different from the surface material of the painted resin handle unit 200 (described later), and has a high surface roughness and a high coefficient of friction. As shown in FIGS. 1, 3, and 11, the rotary operation unit 100 has a rotary operation unit main body 110 and a connecting portion 130. The outer diameters of the rotary operation unit main body 110 at both ends in the direction of the central axis A are approximately equal and smaller than the outer diameter of the main body 20 of the brush unit 10. The outer peripheral surface of the rotary operation unit main body 110 is a curved surface whose outer diameter gradually decreases from both ends in the direction of the central axis A toward the center. As shown in FIGS. 1 and 5, six recesses 111 elongated in the direction of the central axis A are formed on the outer peripheral surface of the rotary operation unit main body 110. Each recess 111 has an elliptical shape that is long in the direction of the central axis A. The recesses 111 are arranged at equal intervals in the circumferential direction on the outer circumferential surface of the rotary operation unit body 110. Therefore, the rotary operation unit body 110 is easy to catch on the fingertips when pinched with the fingertips, and the fingers can be easily moved when rotating. Therefore, the brush 1 is easy for the user to pinch the rotary operation unit body 110 with the fingertips and rotate it.

[0023] As shown in FIGS. 1, 3, and 12, one end of the connecting portion 130 of the rotary operation unit 100 is continuous with the center of the other end surface of the rotary operation unit main body 110 on the handle unit 200 side. Furthermore, the connecting portion 130 extends along the central axis A and is generally cylindrical. By making the connecting portion 130 generally cylindrical, it is possible to easily manufacture the connecting portion 130 and increase the outer peripheral area. This allows the connecting portion 130 to have a larger bonding area with the connecting hole 210 of the handle unit 200. The outer diameter of the connecting portion 130 is smaller than the outer diameter of the other end of the rotary operation unit main body 110 on the handle unit 200 side.

[0024] As shown in FIG. 12 , the other end of the connecting portion 130, which is remote from the rotary operation unit main body 110, is formed with a first annular protrusion 131, a first annular groove 132, a second annular protrusion 133, and a second annular groove 134, in that order from the other end. The first annular protrusion 131 and the second annular protrusion 133 protrude radially from the central axis A relative to the first annular groove 132 and the second annular groove 134. The first annular protrusion 131 and the second annular protrusion 133 extend circumferentially. The outer diameters of the first annular protrusion 131 and the second annular protrusion 133 are the same as the outer diameter of the connecting portion 130 on the rotary operation unit main body 110 side relative to the second annular groove 134. By making the outer diameters of the first annular protrusion 131, the second annular protrusion 133, and the connecting portion 130 the same, the connecting portion 130 can have a larger area with a narrow gap between the connecting portion 130 and the connecting hole 210 of the handle portion 200. Therefore, in this brush 1, rattle between the rotation operation part 100 and the handle part 200 can be suppressed.

[0025] 6 and 12, the first annular protrusion 131 and the second annular protrusion 133 have notched grooves 131A and 133A formed in two locations on opposite radial positions relative to the central axis A. When the connecting portion 130 of the rotation operation unit 100 is inserted into a connecting hole 210 of the handle unit 200 (described later) to connect the rotation operation unit 100, adhesive injected into the connecting hole 210 passes through the two notched grooves 131A of the first annular protrusion 131 and flows into the first annular groove 132, and the adhesive that has flowed into the first annular groove 132 passes through the two notched grooves 133A of the second annular protrusion 133 and flows into the second annular groove 134. In this way, the adhesive flows into and fills the first annular groove 132 and the second annular groove 134, allowing the rotation operation unit 100 and the handle unit 200 to be reliably bonded to each other. At this time, the adhesive that flows into and fills first annular groove 132 and second annular groove 134 bonds the inner circumferential surface of connecting hole 210 in handle portion 200 to the outer circumferential surface of connecting portion 130. Because rotation operation portion 100 and handle portion 200 are securely bonded in this manner, rattle between rotation operation portion 100 and handle portion 200 of brush 1 is suppressed, allowing for smooth rotation operation.

[0026] 6 and 12, the second annular groove portion 134 is divided in the circumferential direction by a convex portion 135 that protrudes from the outer circumferential surface of the second annular groove portion 134 and extends parallel to the central axis A. The convex portion 135 is located in the middle of two notched grooves 133A formed in the second annular convex portion 133 in the circumferential direction around the central axis A.

[0027] As shown in FIGS. 6 and 12 , the connecting portion 130 has a protrusion 136 that protrudes from the outer peripheral surface and extends parallel to the central axis A. The cross-sectional shape of the protrusion 136 perpendicular to the central axis A is semicircular. The protrusion 136 extends from the end face of the rotation operation unit main body 110 on the handle unit 200 side to the surface of a convex portion 135 that circumferentially divides the second annular groove 134. As shown in FIG. 6 , when the connecting portion 130 of the rotation operation unit 100 is inserted into a connecting hole 210 of the handle unit 200 (described later), the protrusion 136 fits into a groove 210A formed in the connecting hole 210. This prevents the handle unit 200 from rotating around the central axis A relative to the rotation operation unit 100.

[0028] The handle portion 200 is made of resin. The surface of the handle portion 200 is painted and has a glossy finish. As shown in Figs. 1 and 3, the outer peripheral surface of the handle portion 200 is continuous with the outer peripheral surface of the rotary operation unit main body 110 without any steps. In other words, the outer diameter of the handle portion 200 at one end on the rotary operation unit main body 110 side is the same as the outer diameter of the rotary operation unit main body 110 at the other end on the handle portion 200 side. As shown in Figs. 6 and 7, the cross section of the handle portion 200 perpendicular to the central axis A is substantially circular.

[0029] The outer diameter of the handle portion 200 gradually increases from one end on the rotary operation unit main body 110 side to the midpoint, which is approximately one-third of the length of the handle portion 200 in the direction of the central axis A. The handle portion 200 has a tapered shape in which the outer diameter gradually decreases from the midpoint to the other end, which is remote from the rotary operation unit main body 110. In this way, the outer surface of the handle portion 200 is a smoothly curved surface in the direction of the central axis A. The other end of the handle portion 200 remote from the rotary operation unit main body 110 is a pointed curved surface.

[0030] The handle unit 200 has a connecting hole 210 formed therein, extending in the direction of the central axis A from the center of the end face on the side of the rotary operation unit main body 110. A groove 210A extending in the direction of the central axis A is formed on the inner peripheral surface of the connecting hole 210. The cross section of the groove 210A perpendicular to the central axis A is semicircular. The inner diameter of the connecting hole 210 is slightly larger than the outer diameter of the connecting part 130 of the rotary operation unit 100. As described above, the handle unit 200 and the rotary operation unit 100 are connected by injecting adhesive into the connecting hole 210 of the handle unit 200 and then inserting the connecting part 130 of the rotary operation unit 100 into the connecting hole 210.

[0031] As described above, the brush 1 of Example 1 is a so-called roll brush having a central axis A that extends in a straight line and comprising a brush section 10, a rotation operation section 100, and a handle section 200, with the brush section 10, rotation operation section 100, and handle section 200 arranged in that order along the central axis A. The brush section 10 has a main body section 20 that extends along the central axis A and brush bristles 30 that extend radially from the surface of the main body section 20 toward the central axis A. As shown in Figure 13, the handle section 200 has an approximately circular cross-sectional shape perpendicular to the central axis A at the part that comes into contact with the user's hand (the pads of the middle finger, ring finger, and little finger, or the side of the hand on the little finger side) when the user uses the rotation operation section 100 by pinching it between the tips of the thumb and index finger, and the user can rotate the rotation operation section 100 around the central axis A while pinching it between the tips of the thumb and index finger.

[0032] When a user uses this brush 1 by pinching the rotary operation unit 100 between the tips of the thumb and index finger and rotating it around the rotation axis, the portion of the handle 200 with a roughly circular cross section perpendicular to the central axis A comes into contact with the user's hand (the pads of the middle finger, ring finger, and little finger, or the side of the hand with the little finger). This allows the user to rotate this brush 1 smoothly and stably around the central axis A. Therefore, this brush 1 is suitable for use when blow-drying and curling hair.

[0033] Therefore, the brush 1 of Example 1 is easy to use while the user rotates it around the central axis A.

[0034] In the brush 1 of Example 1, the surface of the handle portion 200 is a smoothly curved surface in the direction of the central axis A. Therefore, when a user uses the brush 1 by pinching the rotary operation unit 100 between the tips of their thumb and index finger, the surface of the handle portion 200 that comes into contact with their hand (the pads of their middle finger, ring finger, and little finger, or the half of the hand on the little finger side) is a smoothly curved surface in the direction of the central axis A, so that the handle portion 200 can be satisfactorily placed on the user's hand (the pads of their middle finger, ring finger, and little finger, or the half of the hand on the little finger side) regardless of the size of the user's hand. Therefore, the user can use the brush 1 by rotating it smoothly and stably around the central axis A.

[0035] In brush 1 of Example 1, the surface material of rotation operation unit 100 has a high surface roughness and a high coefficient of friction, unlike the surface material of handle unit 200. Therefore, this brush 1 is easy to use and does not slip when a user rotates rotation operation unit 100 around central axis A while holding it between the tips of the thumb and index finger.

[0036] In brush 1 of Example 1, the end of brush unit 10 on the rotation operation unit 100 side has wall surface 29 that extends outward from the outer periphery of rotation operation unit 100. Therefore, when a user holds rotation operation unit 100 with the tips of their thumb or index finger, the tips of their thumb or index finger come into contact with wall surface 29, preventing the tips of the user's thumb or index finger from entering brush unit 10. Therefore, brush 1 can be used by a user by holding an appropriate position of rotation operation unit 100 with the tips of their thumb or index finger and rotating it around central axis A.

[0037] The brush 1 of Example 1 has its center of gravity located closer to the brush unit 10 than to the wall surface 29. Therefore, when a user holds the rotation control unit 100 between the tips of their thumb and index finger, the handle unit 200 naturally touches the user's hand (the side of the hand on the pinky finger side). Therefore, the user can use the brush 1 by holding the rotation control unit 100 between the tips of their thumb and index finger and stably rotating it around the central axis A.

[0038] The present invention is not limited to the first embodiment described above with reference to the drawings, and the following embodiments are also included within the technical scope of the present invention. (1) The brush part, the rotary operation part, and the handle part may be integrally molded. (2) The surface of the handle portion may have a step in the direction of the central axis. (3) The outer diameter of the handle portion may be constant in the direction of the central axis. (4) The surface material of the rotary operating part may be the same as the surface material of the handle part. (5) The outer peripheral surface of the rotary operating part does not need to be formed with a recess. In this case, the outer peripheral surface of the rotary operating part may be formed with small protrusions. (6) The recess formed on the outer peripheral surface of the rotary operating part may be circular, elongated in the circumferential direction of the rotary operating part, polygonal, or have any other geometric shape. (7) The number of recesses formed on the outer peripheral surface of the rotary operation part may be six or more if the diameter of the rotary operation part is large. (8) It is preferable that the recesses formed on the outer peripheral surface of the rotary operation part are arranged at equal intervals. (9) The rotating operating part may be made of rubber. (10) The brush unit does not need to have a wall surface at the end on the rotary operation unit side. (11) The center of gravity of the brush does not have to be located on the brush part side of the wall surface. (12) The brush bristles do not have to be made of multiple hog bristles bound together. In this case, the brush bristles may be made of a single resin bristles or multiple resin bristles bound together. The brush bristles may also be made of elastomer, boar bristles, etc. (13) It does not have to be a roll brush. In this case, it is sufficient that the brush has bristles arranged only within a predetermined range in the circumferential direction of the central axis of the main body of the brush part. (14) The handle portion preferably has a circular cross section perpendicular to the central axis, making it easy for the user to rotate the handle portion of the brush. [Explanation of symbols]

[0039] 1. Brush 10...Brush section 20...Main body 29...Wall 30...Brush bristles 100...Rotation operation unit 200...Handle A…Central axis

Claims

1. A brush having a central axis extending in a straight line, and including a brush part, a rotary operation part, and a handle part, the brush part, the rotary operation part, and the handle part are arranged in this order in the direction of the central axis, The brush part is a main body portion extending along the central axis; Brush bristles extending radially from the surface of the main body with respect to the central axis; It has the handle portion has a substantially circular cross-sectional shape perpendicular to the central axis at a portion where a user's hand comes into contact when the user grips the rotation operation portion with his / her fingertips to use the rotation operation portion, The brush can be rotated around the central axis while the user holds the rotation operation part with their fingertips.

2. 2. The brush according to claim 1, wherein the surface of the handle portion is a smoothly curved surface in the direction of the central axis.

3. 3. The brush according to claim 1, wherein the surface of the rotary operation part is made of a material different from the surface of the handle part.

4. 3. The brush according to claim 1, wherein an end of the brush part on the side of the rotary operation part has a wall surface that extends outward from an outer periphery of the rotary operation part.

5. 5. The brush according to claim 4, wherein the center of gravity is located closer to the brush portion than the wall surface.

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