JP2007222422A - Toothbrush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a very simple structure, to lightly and smoothly extrude toothpaste and to fill the toothpaste in a clean state. <P>SOLUTION: In the toothbrush, the toothpaste filled in a handle part 20 is supplied to a toothbrush part 10 and discharged from a brush part 11. The handle part 20 includes a main body cylinder 30, an extrusion rod 40 and a rotary knob 50. The main body cylinder 30 fills the toothpaste in a filling cylinder part 31 on the end side. The extrusion rod 40 is provided with a piston 41 for extruding the toothpaste on the end and is provided with male threads 42 on the rear side of the piston 41. The rotary knob 50 is connected to the main body cylinder 30 so as to be rotated but not to be moved in an axial direction. In the toothbrush, the extrusion rod 40 is moved in the axial direction by rotating female threads 34 and 52 engaged with the male threads 42 of the extrusion rod 40 relatively to the extrusion rod 40 by the rotary knob 50, and the toothpaste is extruded toward the toothbrush part 10 by the piston 41 of the extrusion rod 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a toothbrush that stores a toothpaste paste in a handle portion and can discharge the toothpaste paste to a brush portion when in use.

Toothbrushes have been developed that fill the handle with toothpaste paste and can be discharged during use. (See Patent Documents 1 to 4)
JP 2001-57908 A JP-A-11-28120 Registered Utility Model No. 3053011 JP-T-2002-503129

  Patent Document 1 describes a pen-type toothbrush that supplies a toothpaste stored in a shaft cylinder part to a front toothbrush part by a rotation operation from the outside. In this toothbrush, the shaft cylinder part constitutes a rotation operation part, and the toothpaste filling cartridge, the pressing member, and the screw feeding mechanism are provided in the shaft cylinder part, and the pressing member passes through the screw feeding mechanism as the shaft cylinder part rotates. Then, the cartridge goes straight forward to compress and deform the cartridge, and the toothpaste is supplied to the toothbrush portion.

  The toothbrush having this structure is complicated in structure because the cartridge is filled with the toothpaste paste. Also, the cartridge has a drawback that it takes time and effort to refill the toothpaste repeatedly. Furthermore, since the toothpaste is discharged by crushing the cartridge, it is difficult to extrude the toothpaste smoothly with a light operation. This is because a force for crushing the cartridge is required.

  Patent document 2 has described the toothbrush which can extrude a toothpaste by rotating a knob. This toothbrush is filled with a toothpaste paste in a cylinder, and a piston for extruding this toothpaste paste is provided so that it does not rotate but moves in the axial direction, and a female screw hole is provided at the center of the piston, The male screw shaft connected to the knob is inserted, the male screw shaft is rotated with the knob, the piston is moved, and the toothpaste paste is pushed out.

  The toothbrush part of Patent Document 3 is provided with a female screw on the inner surface of a handle cylinder part filled with a toothpaste, and a male screw shaft is screwed into the female screw to push the filled toothpaste into the toothbrush part. .

  The toothbrushes of Patent Documents 2 and 3 are difficult to use in a clean state because a male screw shaft is inserted into the toothpaste paste or a female screw is provided on the inner surface of the handle tube portion. In particular, when the toothpaste is repeatedly refilled and used, the surface of the male screw shaft with unevenness and the female screw on the inner surface of the handle tube cannot be cleaned cleanly. For this reason, there is a drawback that it cannot be used repeatedly and reused in a clean state. In addition, since the internal thread of the piston is slid on the external thread shaft or the external thread is slid on the internal thread of the handle tube portion, the sliding portion is worn by the abrasive contained in the toothpaste, and In addition, there is a drawback that the piston and the male screw shaft plastic or metal worn by the abrasive are mixed in the toothpaste.

  In Patent Document 4, a piston is provided in a handle cylinder filled with a toothpaste paste, a connection cord is connected to the piston, the connection cord is wound around a spindle provided at the front of the handle portion, and the piston is moved. Toothbrushes for extruding toothpaste are described.

  In the toothbrush having this structure, since the connection cord is inserted into the toothpaste and the connection cord is wound around the spindle provided in the toothpaste paste discharge portion, it is difficult to clean this portion. Further, since the piston is moved by winding the connection cord with the spindle, there is a drawback that it is difficult to move the piston stably as compared with the female screw and the male screw which are engaged with each other.

  The present invention has been developed for the purpose of solving such drawbacks. An important object of the present invention is that the toothpaste can be extruded lightly and smoothly while having a very simple structure, and it is not necessary to provide a female screw, a male screw, a cord, or the like in the portion where the toothpaste is filled. To provide a toothbrush that can be filled and discharged with a toothpaste paste in a safe state.

The toothbrush of this invention is equipped with the following structures in order to achieve the above-mentioned objective.
The toothbrush includes a handle portion 20 filled with a toothpaste and a toothbrush portion 10 connected to the handle portion 20, and supplies the toothpaste filled in the handle portion 20 to the toothbrush portion 10 to supply the brush portion 11. To discharge from. The handle portion 20 includes a main body cylinder 30 having a cylindrical shape as a whole, an extrusion rod 40 arranged to move in the axial direction inside the main body cylinder 30, and the extrusion rod 40 in the axial direction. A rotary knob 50 to be moved. The main body cylinder 30 is provided with a filling cylinder part 31 which is provided with a filling chamber 32 for filling a toothpaste paste on the distal end side where the toothbrush part 10 is connected. The push rod 40 has a piston 41 that moves the filling cylinder portion 31 in the axial direction to push out the toothpaste, and has a male screw 42 on the rear side of the piston 41. The rotary knob 50 is connected to the main body cylinder 30 so that it can rotate but does not move in the axial direction, and the female screws 34 and 52 that mesh with the male screw 42 of the push rod 40 are connected to the male screw 42 of the push rod 40. It is designed to rotate relatively. The toothbrush rotates the female screws 34 and 52 engaged with the male screw 42 of the extrusion rod 40 relative to the extrusion rod 40 with the rotary knob 50 to move the extrusion rod 40 in the axial direction. The piston 41 pushes the toothpaste in the filling chamber 32 toward the toothbrush unit 10.

  In the toothbrush of the present invention, the main body cylinder 30 is provided with a female screw cylinder portion 33 provided with an internal thread 34 on the inner surface on the rear end side of the filling cylinder portion 31, and the push rod 40 is provided with an internal thread at the rear end portion. A male screw 42 that meshes with the female screw 34 of the cylindrical portion 33 is provided, and a non-circular shaft hole 44 is provided at the center so as to open at the rear end in the axial direction. A non-circular shaft 54 can be provided which is inserted into the shaft hole 44 so as to move in the axial direction but not to rotate relatively. In this toothbrush, the rotary knob 50 rotates the extrusion rod 40 via the non-circular shaft 54, and the male screw 42 of the rotated extrusion rod 40 slides on the female screw 34 of the female screw cylinder portion 33 to push the extrusion rod 40. Is moved in the axial direction, and the piston 41 of the extrusion rod 40 can push out the toothpaste in the filling chamber 32 toward the toothbrush portion 10.

  In the toothbrush of the present invention, the piston 41 of the extrusion rod 40 is arranged in the filling chamber 32 so that it can move in the axial direction without rotating, and the extrusion rod 40 protrudes rearward of the piston 41. In addition, a female screw hole 53 that meshes with the male screw shaft 43 of the push rod 40 can be provided in the central shaft portion of the rotary knob 50. In this toothbrush, the rotary knob 50 rotates the female screw hole 53, the female screw hole 53 moves in the axial direction on the male screw shaft 43 of the extrusion rod 40, and the tooth paste of the filling chamber 32 is transferred to the toothbrush portion by the piston 41. 10 can be pushed out.

  In the toothbrush of the present invention, the intermediate tube 60 can be disposed inside the rotary knob 50. This toothbrush is provided with a female screw 52 on the inner surface of the rotary knob 50, a male screw 61 meshing with the female screw 52 is provided on the outer side of the intermediate cylinder 60, and an intermediate female screw hole 63 is provided on the inner side of the intermediate cylinder 60. Thus, the extrusion rod 40 can be provided with a male screw shaft 43 that engages with the intermediate female screw hole 63 of the intermediate cylinder 60 so as to protrude rearward of the piston 41. This toothbrush can rotate the rotary knob 50 to move the intermediate cylinder 60 in the pushing direction of the piston 41, and the intermediate cylinder 60 can move the pushing rod 40 in the pushing direction of the piston 41.

  The toothbrush of the present invention is a brush in which a toothbrush portion 10 is connected to a handle portion 20 so that the toothbrush portion 10 can rotate, and a countless bristle connected to the tip of the connection shaft 12 is planted. Part 11, and the brush part 11 communicates with the hollow part of the connecting shaft 12 to open the discharge port 14 for discharging the toothpaste paste to the outside, and the handle part 20 has one end in the filling chamber 32 of the main body cylinder 30. A discharge pipe 73 that is connected is provided, the discharge pipe 73 is inserted into the hollow portion of the connecting shaft 12 so as to be rotatable, and an opening / closing hole 74 that supplies toothpaste to the discharge port 14 of the brush portion 11 is opened. Can do. This toothbrush can open and close the opening / closing hole 74 of the discharge pipe 73 at the discharge port 14 of the brush part 11 by rotating the toothbrush part 10 with respect to the handle part 20.

  In the toothbrush of the present invention, the toothbrush part 10 is connected to the handle part 20 via the stopper mechanism 80, the connecting position of the toothbrush part 10 and the handle part 20 is specified by the stopper mechanism 80, and the opening / closing hole 74 is connected to the outlet 14. The toothpaste can be discharged. Further, this toothbrush includes a stopper mechanism 80 that includes an elastic arm 15 provided on the connecting shaft 12 and an engaging portion 75 provided on the main body cylinder 30 for engaging the tip of the elastic arm 15. 15 can be guided to the locking portion 75, and the toothbrush portion 10 can be connected to a specific position of the handle portion 20.

  The toothbrush of the present invention has a very simple structure and can extrude the toothpaste paste lightly and smoothly, and it is not necessary to arrange a female screw, a male screw, or a cord in the portion where the toothpaste paste is filled, and is in a clean state. It has the feature that it can be filled with toothpaste paste and discharged. The toothbrush of the present invention has a structure in which the toothbrush portion is connected to the handle portion, and the handle portion is further arranged to move in the axial direction inside the cylindrical main body tube and the main body tube. It consists of a rod and a rotary knob that moves this extrusion rod in the axial direction, the main body cylinder is provided with a filling chamber filled with toothpaste on the tip side connecting the toothbrush part, and the extrusion rod A piston that moves the filling cylinder in the axial direction and pushes out the toothpaste paste is provided at the tip, and a male screw is provided on the rear side of the piston. Further, the rotary knob can rotate on the main body cylinder but does not move in the axial direction. The female screw engaged with the male screw of the push rod is rotated relative to the male screw of the push rod, and the rotary knob moves the female screw engaged with the male screw of the push rod to the push rod. Relative Rotates in the pushrod to move in the axial direction, is because so that pushing the filling chamber of the toothpaste in the piston of the push rod.

  Particularly, the toothbrush according to claim 2 of the present invention can smoothly extrude the toothpaste while simplifying the entire structure. This is because the piston is advanced while rotating inside the filling chamber of the main body cylinder, so that the filling cylinder can be formed into a cylindrical shape that can be easily formed.

  Further, the toothbrush according to claim 3 of the present invention is provided with a female screw hole in the rotary knob, a male screw meshing with the female screw hole is provided in the push rod, and the push knob is rotated without rotating the push rod. Is moved in the axial direction. The toothbrush of this structure is provided with a female screw and a male screw that mesh with the rotary knob and the push rod, and the push rod is moved directly in the axial direction by the rotary knob, so that the piston of the push rod is driven reliably and stably. Toothpaste can be extruded.

  Furthermore, in the toothbrush according to claim 4 of the present invention, an intermediate cylinder is disposed between the rotary knob and the extrusion rod, and the piston of the extrusion rod can be pushed out in two stages by the intermediate cylinder. For this reason, the length of the handle portion is shortened to increase the piston pushing stroke, that is, a large amount of toothpaste can be pushed out.

  Moreover, the toothbrush of Claim 5 of this invention can be made into the state which rotates a toothbrush part with respect to a handle | pattern part, and stops the extrusion state of toothpaste, and extrusion. For this reason, when the toothbrush is not used, the toothpaste can be prevented from leaking and can be used cleanly and hygienically.

  Embodiments of the present invention will be described below with reference to the drawings. However, the Example shown below illustrates the toothbrush for actualizing the technical idea of this invention, Comprising: This invention does not specify a toothbrush to the following.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The toothbrush shown in FIG. 1 includes a handle portion 20 filled with a toothpaste and a toothbrush portion 10 connected to the handle portion 20 so as to be removable. This toothbrush supplies the toothpaste filled in the handle part 20 to the toothbrush part 10 and discharges it from the brush part 11.

  The handle | steering-wheel part 20 is arrange | positioned so that it may move to the axial direction inside the main body cylinder 30 which makes the whole shape cylindrical, as shown to sectional drawing of FIG. 2 thru | or FIG. An extrusion rod 40 and a rotary knob 50 that moves the extrusion rod 40 in the axial direction are provided.

  The main body cylinder 30 in FIGS. 2 and 3 is formed of a hard material into a cylindrical shape. As the hard material, for example, hard plastic or metal such as aluminum or aluminum alloy can be used. The main body cylinder 30 has a front end side connecting the toothbrush part 10 as a filling cylinder part 31 and a rear end side as a female screw cylinder part 33. The main body cylinder 30 in the figure has a filling cylinder portion 31 at about half of the front end side and a female screw cylinder portion 33 at about half of the rear end side. The filling cylinder part 31 is cylindrical and has a filling chamber 32 for filling a toothpaste inside. The female screw cylinder portion 33 is provided with a female screw 34 on the inner surface. Furthermore, the main body cylinder 30 is provided with a circular coupling groove 35 that is coupled to the rear end of the female screw cylinder portion 33 so that the rotary knob 50 can be rotated.

  The push rod 40 has a piston 41 that moves the filling cylinder portion 31 in the axial direction to push out the toothpaste, and has a male screw shaft 43 protruding from the rear side of the piston 41. The piston 41 is provided with an annular groove on the outer peripheral surface, and an O-ring 49 is inserted therein. The male screw shaft 43 has a length in which the rear end is positioned at the rear end of the female screw cylinder portion 33 in a state where the piston 41 is most retracted into the filling chamber 32, in other words, substantially equal to the length of the female screw cylinder portion 33. is doing. The male screw shaft 43 is provided with a male screw 42 that meshes with the female screw 34 of the female screw cylinder 33 at the rear end.

  Further, the push rod 40 is provided with a non-circular shaft hole 44 extending in the axial direction at the center thereof and opened at the rear end. The non-circular shaft hole 44 is an elongated hole having a square, polygonal, or elliptical cross-sectional shape. The non-circular shaft hole 44 is provided from the rear end of the push rod 40 to the piston 41 so as not to penetrate the piston 41.

  The rotary knob 50 is connected to the rear end of the main body cylinder 30 so that it can rotate but does not move in the axial direction. The rotary knob 50 shown in the figure is provided with a circular ridge 55 that is guided so as to slide in a connecting groove 35 provided at the rear end of the main body cylinder 30 so as to protrude toward the inner surface of the main body 30. The circular ridge 55 is inserted into the connecting groove 35, and the rotary knob 50 is connected to the main body cylinder 30 so as to be rotatable. Further, the rotary knob 50 of FIG. 2 is provided with a knob cylinder 56 that covers the outer side of the main body cylinder 30 so as to be slidable. Since the rotary knob 50 can widen the knob cylinder 56, it can be easily rotated by grasping it with a hand.

  Furthermore, the rotary knob 50 is integrally formed with a non-circular shaft 54 that is inserted into the non-circular shaft hole 44 of the extrusion rod 40 so as to be movable in the axial direction. The non-circular shaft 54 is inserted into the non-circular shaft hole 44 of the push rod 40 so that it can move in the axial direction but does not rotate. Therefore, the outer shape of the non-circular shaft 54 is formed slightly smaller than the inner shape of the non-circular shaft hole 44. A rectangular non-circular shaft 54 is inserted into the non-circular shaft hole 44 having a square hole. The length of the non-circular shaft 54 is substantially equal to the length of the non-circular shaft hole 44, and the non-circular shaft 54 is fully inserted into the non-circular shaft hole 44 with the piston 41 retracted most as shown in the figure. Is done.

  As shown in FIG. 2, the handle 20 having this structure fills the filling chamber 32 with the toothpaste with the piston 41 retracted most. At this time, the male screw shaft 43 of the push rod 40 is accommodated in the female screw cylinder portion 33 of the main body cylinder 30. Further, the non-circular shaft 54 of the rotary knob 50 is inserted into the non-circular shaft hole 44 of the push rod 40. This handle part 20 extrudes the toothpaste filled in the filling chamber 32 of the filling cylinder part 31 as follows.

(1) The rotary knob 50 is rotated to the right. The rotary knob 50 is connected to the rear end of the main body cylinder 30 and is rotated without moving in the axial direction.
(2) The rotary knob 50 that is rotated rotates the push rod 40. This is because the non-circular shaft 54 of the rotary knob 50 is inserted into the non-circular shaft hole 44 of the push rod 40.
(3) When the push rod 40 is rotated to the right, the male screw 42 of the push rod 40 is engaged with the female screw 34 provided on the inner surface of the female screw cylinder portion 33 and rotated, so that the push rod 40 is moved to the piston 41. Is moved in the direction of pushing out.
(4) The moving piston 41 pushes the toothpaste in the filling chamber 32 toward the toothbrush portion 10.

  The handle portion 20 of FIG. 2 is provided with a female screw cylinder portion 33 in the main body cylinder 30 in order to accommodate the male screw shaft 43 of the push rod 40. The handle portion 20 of FIG. 4 houses the male screw shaft 43 of the push rod 40 in the rotary knob 50. Therefore, the main body cylinder 30 of FIG. 4 has a connecting groove 35 for connecting the front end side connecting the toothbrush part 10 as a filling cylinder part 31 so that it can be rotated without moving the rotary knob 50 in the axial direction. Provided. The main body cylinder 30 has a filling cylinder portion 31 at least half of the whole. The filling cylinder part 31 moves the piston 41 of the extrusion rod 40 in the axial direction without rotating. Therefore, as shown in FIG. 5, the filling cylinder portion 31 has a cylindrical shape in which the inner cross section is elliptical and the outer cross section is circular. However, the filling cylinder portion does not necessarily have an elliptical inner shape, and can be moved in the axial direction without rotating the piston as a cylindrical shape having a polygonal cross section.

  The push rod 40 has a piston 41 that moves the filling cylinder portion 31 in the axial direction to push out the toothpaste, and has a male screw shaft 43 protruding from the rear side of the piston 41. The piston 41 is provided with an annular groove along the outer peripheral surface, and an O-ring 49 is inserted therein. The male screw shaft 43 has a length at which the rear end is positioned at the rear end of the rotary knob 50 in a state where the piston 41 is most retracted to the filling chamber 32, in other words, equal to the stroke of the piston 41. The male screw shaft 43 is provided with a male screw 42 that meshes with the female screw 52 of the rotary knob 50 as a whole.

  The rotary knob 50 is connected to the rear end of the main body cylinder 30 so that it can rotate but does not move in the axial direction. The rotary knob 50 in the figure is provided with a circular ridge 55 that is guided so as to be slidable in a connecting groove 35 provided at the rear end of the main body cylinder 30 so as to protrude toward the inner surface of the main body 30. The circular ridge 55 is inserted into the connecting groove 35, and the rotary knob 50 is connected to the main body cylinder 30 so as to be rotatable. Further, the rotary knob 50 of FIG. 4 has a length protruding rearward from the main body cylinder 30 and is provided with a female screw hole 53 for guiding the male screw shaft 43 of the push rod 40 in the central shaft portion. A portion of the rotary knob 50 that protrudes rearward from the main body cylinder 30 has a cylindrical shape that is equal to the outer shape of the main body cylinder 30. The female screw hole 53 of the rotary knob 50 has a length capable of inserting the male screw shaft 43 of the push rod 40. 4 is provided with a female screw 52 that meshes with the male screw shaft 43 only at the opening of the female screw hole 53. However, as shown in FIG. An internal thread 52 that meshes with the shaft 43 can also be provided.

  As shown in FIG. 4 and FIG. 6, the handle 20 having this structure fills the filling chamber 32 with the toothpaste with the piston 41 most retracted. At this time, the male screw shaft 43 of the push rod 40 is inserted into the female screw hole 53 of the rotary knob 50. The toothpaste paste filled in the filling chamber 32 of the filling cylinder part 31 is extruded as follows.

(1) The rotary knob 50 is rotated to the right. The rotary knob 50 is connected to the rear end of the main body cylinder 30 and is rotated without moving in the axial direction.
(2) The rotary knob 50 rotated to the right rotates the female screw 52 of the female screw hole 53.
(3) Since the female screw 52 of the female screw hole 53 is engaged with the male screw 42 of the male screw shaft 43 of the push rod 40, the male screw shaft 43 is moved in the axial direction. This is because the male screw shaft 43 can move in the axial direction but is connected to the main body cylinder 30 so as not to rotate.
(4) The male screw shaft 43 moved in the axial direction moves the piston 41 of the filling chamber 32 in the axial direction and pushes the tooth paste out of the filling chamber 32 toward the toothbrush portion 10.

  Further, in the handle portion 20 of FIG. 7, an intermediate cylinder 60 is disposed inside the rotary knob 50. The main body cylinder 30 of the handle part 20 has the filling cylinder part 31 as the front end side connecting the toothbrush part 10 as in the main body cylinder 30 of FIG. A connection groove 35 is provided for connection so as to be rotatable. The main body cylinder 30 has a filling cylinder portion 31 at least half of the whole. The filling cylinder part 31 moves the piston 41 of the extrusion rod 40 in the axial direction without rotating. Therefore, the filling cylinder portion 31 has a cylindrical shape in which the inner cross section is elliptical and the outer cross section is circular. However, the filling cylinder portion does not necessarily have an elliptical inner shape, and can be moved in the axial direction without rotating the piston as a cylindrical shape having a polygonal cross section.

  The push rod 40 has a piston 41 that moves the filling cylinder portion 31 in the axial direction to push out the toothpaste, and has a male screw shaft 43 protruding from the rear side of the piston 41. The piston 41 is provided with an annular groove along the outer peripheral surface, and an O-ring 49 is inserted therein. The male screw shaft 43 has a length at which the rear end is positioned at the rear end of the rotary knob 50 in a state where the piston 41 is most retracted to the filling chamber 32, in other words, equal to the stroke of the piston 41. The male screw shaft 43 is provided with a male screw 42 that meshes with the female screw 62 of the intermediate cylinder 60 as a whole.

  The rotary knob 50 is connected to the rear end of the main body cylinder 30 so that it can rotate but does not move in the axial direction. The rotary knob 50 shown in the figure has a circular ridge 55 that is guided so as to be slidable in a connecting groove 35 provided at the rear end of the main body cylinder 30 so as to protrude toward the inner surface of the main body cylinder 30. The circular ridge 55 is inserted into the connecting groove 35, and the rotary knob 50 is connected to the main body cylinder 30 so as to be rotatable. Further, the rotary knob 50 of FIG. 7 has a length protruding rearward from the main body cylinder 30 and is provided with a female screw hole 53 for guiding the intermediate cylinder 60 in the central shaft portion. The rear end portion of the rotary knob 50 protruding rearward from the main body cylinder 30 has a cylindrical shape equal to the outer shape of the main body cylinder 30. The female screw hole 53 of the rotary knob 50 has a length capable of inserting the intermediate cylinder 60. The female screw hole 53 is provided with a female screw 52 that meshes with the male screw 61 of the intermediate cylinder 60 as a whole.

  The intermediate cylinder 60 has a hollow cylindrical shape, and a male screw 61 that engages with the female screw 52 of the female screw hole 53 of the rotary knob 50 is provided at the outer rear end, and a male screw shaft 43 of the push rod 40 is provided on the inner side. An intermediate female screw hole 63 that meshes with the male screw 42 is provided. The intermediate cylinder 60 shown in the figure is provided with a female screw 62 that meshes with the male screw shaft 43 only at the opening of the intermediate female screw hole 63, but a female screw that meshes with the male screw of the male screw shaft is formed on the entire intermediate cylinder. It can also be provided.

  The intermediate cylinder 60 is disposed inside the rotary knob 50 so that it can rotate. Therefore, when the rotary knob 50 is rotated, the intermediate cylinder 60 is rotated together with the rotary knob 50 or is not rotated. The intermediate cylinder 60 that is not rotated together with the rotating rotary knob 50 does not move in the axial direction with respect to the rotary knob 50, but moves the push rod 40 in the axial direction. The intermediate cylinder 60 that does not rotate with respect to the rotating knob 50 is moved in the axial direction with respect to the rotating knob 50. When the rotary knob 50 is rotated to the right, the intermediate cylinder 60 moves in the pushing direction of the piston 41 with respect to the rotary knob 50, and the push rod 40 moves in the pushing direction of the piston 41 with respect to the intermediate pipe 60. . Whether or not the intermediate cylinder 60 is rotated when the rotary knob 50 is rotated is specified by the frictional resistance between the rotary knob 50 and the intermediate cylinder 60 and the magnitude of the frictional resistance between the intermediate cylinder 60 and the push rod 40. The If the frictional resistance between the rotary knob 50 and the intermediate cylinder 60 is larger than the frictional resistance between the intermediate cylinder 60 and the push rod 40, the intermediate cylinder 60 is rotated together with the rotary knob 50 when the rotary knob 50 is rotated. The However, since the extrusion rod 40 and the intermediate cylinder 60 are provided with retaining stoppers 45 and 65 for specifying the movement distance, in the state where the retaining stoppers 45 and 65 abut and the movement in the axial direction is restricted, A member whose axial movement is not restrained moves.

  As shown in FIG. 7, the handle portion 20 of this structure fills the filling chamber 32 with the toothpaste with the piston 41 most retracted. At this time, the intermediate cylinder 60 and the push rod 40 are in the most retracted position. Therefore, the intermediate cylinder 60 is inserted into the female screw hole 53 of the rotary knob 50, and the male screw shaft 43 of the push rod 40 is in a position to be inserted into the intermediate female screw hole 63 of the intermediate cylinder 60. The handle 20 extrudes the toothpaste that is filled in the filling chamber 32 of the filling cylinder as follows.

(1) The rotary knob 50 is rotated to the right. The rotary knob 50 is connected to the rear end of the main body cylinder 30 and is rotated without moving in the axial direction.
(2) When the intermediate cylinder 60 is rotated together with the rotary knob 50 that rotates clockwise, the female screw 62 of the intermediate female screw hole 63 of the intermediate cylinder 60 is rotated.
(3) Since the female screw 62 of the intermediate female screw hole 63 of the intermediate cylinder 60 is engaged with the male screw 42 of the male screw shaft 43 of the push rod 40, the male screw shaft 43 is moved in the axial direction. This is because the male screw shaft 43 can move in the axial direction but is connected to the main body cylinder 30 so as not to rotate.
(4) The male screw shaft 43 moved in the axial direction moves the piston 41 of the filling chamber 32 in the axial direction and pushes the tooth paste out of the filling chamber 32 toward the toothbrush portion 10.
(5) When the stopper 45 of the push rod 40 comes into contact with the flange 66 of the intermediate tube 60 and the movement of the piston 41 is stopped, the rotation of the intermediate tube 60 is stopped by the push rod 40.
(6) When the rotary knob 50 is rotated and the intermediate cylinder 60 does not rotate, the intermediate cylinder 60 is moved in the pushing direction of the piston 41 with respect to the rotary knob 50. This is because the female screw 52 of the female screw hole 53 of the rotary knob 50 and the male screw 61 of the intermediate cylinder 60 are engaged with each other.
(7) The intermediate cylinder 60 that moves in the axial direction moves the piston 41 further in the extrusion direction to push out the toothpaste from the filling chamber 32. In this state, the piston 41 is moved to the upper end.

  In the above operation, when the rotary knob 50 is rotated to the right, the intermediate cylinder 60 is first rotated together with the rotary knob 50, and the retaining stopper 45 of the push rod 40 stops the axial movement of the push rod 40. The rotation of the intermediate cylinder 60 is stopped, and the intermediate cylinder 60 is pushed out in the axial direction. However, since the handle portion 20 of FIG. 7 allows the rotation of the intermediate cylinder 60 to be free, when the rotary knob 50 is rotated, the intermediate cylinder 60 is first moved in the axial direction without rotating, and the stopper for the intermediate cylinder 60 is prevented. After 65 is brought into contact with the flange 36 provided on the main body cylinder 30 and stopped, the intermediate cylinder 60 may rotate together with the rotary knob 50 to move the push rod 40 in the axial direction. Further, when the rotary knob 50 is rotated, the intermediate cylinder 60 does not rotate together with the rotary knob 50 but rotates slower than the rotary knob 50 to move the intermediate cylinder 60 in the axial direction with respect to the rotary knob 50. Further, the extrusion rod 40 may be moved in the axial direction with respect to the intermediate cylinder 60.

  As shown in FIGS. 8 and 9, the toothbrush portion 10 has a hollow connecting shaft 12 connected to the handle portion 20 so as to be rotatable, and innumerable hairs connected to the tip of the connecting shaft 12. The brush part 11 is provided. In order to connect the connecting shaft 12 of the toothbrush portion 10, the handle portion 20 fixes a lid member 70 that closes the tip opening of the filling tube portion 31 to the tip of the main body tube 30.

  The lid member 70 has a cylindrical shape such as a cylinder, and is provided with a partition wall 71 in the middle. The partition wall 71 is divided into a body side connected to the body tube 30 and a brush side connecting the toothbrush portion 10. On the main body side, an internal thread 72 is provided on the inner surface. The female screw 72 is screwed into a male screw 37 provided on the outer periphery of the front end portion of the main body cylinder 30 to connect the lid member 70 to the main body cylinder 30.

  The partition wall 71 is connected to the discharge pipe 73 at the center. The discharge pipe 73 is a flexible pipe and is inserted into the hollow portion of the connecting shaft 12 so as to be rotatable. Further, the discharge pipe 73 has an opening / closing hole 74 that supplies toothpaste to the discharge port 14 of the brush portion 11.

  The connecting shaft 12 is inserted on the brush side of the lid member 70 so as to be detachable on the inner side, and the toothbrush portion 10 is connected. The toothbrush part 10 is inserted in the brush side of the cover material 70, and is connected so that it can rotate. The toothbrush portion 10 is connected to the lid member 70 of the handle portion 20 via a stopper mechanism 80. The stopper mechanism 80 specifies the connecting position of the toothbrush part 10 and the handle part 20, in other words, the rotational position of the toothbrush part 10 with respect to the handle part 20, and switches between a state where the toothpaste can be discharged and a state where it is not discharged.

  In the illustrated toothbrush, a stopper mechanism 80 is provided on an elastic arm 15 provided on the connecting shaft 12 of the toothbrush part 10, and a locking part provided on the lid member 70 of the main body cylinder 30 to lock the tip of the elastic arm 15. 75. The stopper mechanism 80 guides the convex portion 16 of the elastic arm 15 to the locking portion 75 and stops the toothbrush portion 10 at a specific position of the handle portion 20. The stopper mechanism 80 stops the toothbrush part 10 in the open position where the toothpaste paste can be discharged and in the closed position where the discharge of the toothpaste paste is stopped.

  On the brush side of the lid 70, a fitting recess 76 that can fit the convex portion 16 of the elastic arm 15 is provided on the inner surface as the locking portion 75 of the elastic arm 15. The fitting recess 76 is provided at a position for guiding the convex portion 16 of the elastic arm 15 at the open position and the closed position of the toothbrush portion 10. Therefore, the fitting recesses 76 at the open position and the closed position are arranged apart from each other in the rotation direction of the toothbrush portion 10. The fitting recesses 76 at the open position and the closed position are connected by a slit 77 extending in the rotation direction. The slit 77 guides the push button 17 protruding outward from the elastic arm 15 and arranges it on the outer side of the lid 70 on the brush side. The push button 17 is pressed to elastically deform the elastic arm 15. The push button 17 includes a head portion 17A that is discharged to the outside of the handle portion 20 and a rod portion 17B that connects the head portion 17A to the elastic arm 15. The head portion 17A is enlarged, and the rod portion 17B is slit. 77 so that it can pass through. Further, the slit 77 extends to the opening edge on the brush side. The rod portion 17 </ b> B of the push button 17 is inserted into the slit 77 to connect the toothbrush portion 10 to the handle portion 20.

  The connecting shaft 12 is provided with a cylindrical portion 13 to be inserted and connected to the lid member 70 of the handle portion 20 at the rear end, and an elastic arm 15 is provided on the cylindrical portion 13. The elastic arm 15 cuts the cylindrical part 13 into two rows so as to extend parallel to the axial direction, and the elastic arm 15 is provided between the cut parts. The elastic arm 15 is provided with a convex portion 16 guided to the fitting concave portion 76 of the lid member 70 at the distal end portion. Further, the elastic arm 15 connects the push button 17. Further, the connecting shaft 12 communicates with the hollow portion inside and opens a discharge port 14 for discharging the toothpaste paste to the outside in the brush portion 11.

  The toothbrush portion 10 having the above structure is connected to the handle portion 20 by inserting the cylindrical portion 13 provided at the tip of the connecting shaft 12 into the lid member 70 of the handle portion 20. At this time, the rod portion 17B of the push button 17 is inserted into the slit 77 provided on the brush side of the lid member 70, and the convex portion 16 of the elastic arm 15 is guided to the fitting concave portion 76. When the toothbrush portion 10 is rotated left and right, the convex portion 16 of the elastic arm 15 is guided to the fitting concave portion 76 in the open position and the closed position. The opening / closing hole 74 of the discharge pipe 73 is connected to the discharge port 14 of the brush portion 11 in a state where the convex portion 16 of the elastic arm 15 is guided by the fitting recess 76 in the open position. Therefore, when the rotary knob 50 is rotated in this state, the tooth paste in the filling chamber 32 is discharged to the brush portion 11. When the toothbrush part 10 is rotated and the convex part 16 of the elastic arm 15 is guided to the fitting concave part 76 in the closed position, the opening / closing hole 74 of the discharge pipe 73 is not connected to the discharge port 14 of the brush part 11 and opens / closes. The hole 74 is closed by the connecting shaft 12 of the toothbrush portion 10. Therefore, even if the rotary knob 50 is rotated in this state, the toothpaste paste is not discharged to the brush portion 11. The outer diameter of the discharge pipe 73 is substantially equal to the inner diameter of the connecting shaft 12 so that the toothpaste is not pushed out in the closed position. However, since the discharge pipe and the connecting shaft are rotated relative to each other, a slight gap is provided so that the toothpaste does not leak.

It is a perspective view of a toothbrush concerning one example of the present invention. It is sectional drawing of the handle | pattern part of the toothbrush shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA of the handle shown in FIG. 2. It is sectional drawing which shows another example of a handle | pattern part. It is the sectional view on the AA line of the handle | pattern part shown in FIG. It is sectional drawing which shows another example of a handle | pattern part. It is sectional drawing which shows another example of a handle | pattern part. It is a disassembled perspective view which shows the toothbrush part and lid | cover material of the toothbrush shown in FIG. It is sectional drawing which shows the connection structure of the toothbrush part and handle | steering-wheel part of the toothbrush shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Toothbrush part 11 ... Brush part 12 ... Connecting shaft 13 ... Tube part 14 ... Discharge port 15 ... Elastic arm 16 ... Convex part 17 ... Push button 17A ... Head
17B ... Rod part 20 ... Handle part 30 ... Main body cylinder 31 ... Filling cylinder part 32 ... Filling chamber 33 ... Female screw cylinder part 34 ... Female screw 35 ... Connecting groove 36 ... Gutter part 37 ... Male screw 40 ... Extrusion rod 41 ... Piston 42 ... male screw 43 ... male screw shaft 44 ... non-circular shaft hole 45 ... retaining stopper 49 ... O-ring 50 ... rotating knob 52 ... female screw 53 ... female screw hole 54 ... non-circular shaft 55 ... circular convex 56 ... knob cylinder 60 ... Intermediate cylinder 61 ... Male screw 62 ... Female screw 63 ... Intermediate female screw hole 65 ... Removal stopper 66 ... 鍔 70 ... Ladder 71 ... Partition wall 72 ... Female screw 73 ... Discharge pipe 74 ... Open / close hole 75 ... Locking portion ... Fitting recess 77 ... Slit 80 ... Stopper mechanism

Claims (7)

A toothbrush part (10) comprising a handle part (20) for filling a toothpaste and a toothbrush part (10) connected to the handle part (20), and a toothbrush part (10) In a toothbrush that is supplied to and discharged from the brush part (11),
The handle portion (20) has a cylindrical main body tube (30), and an extrusion rod (40) arranged to move in the axial direction inside the main body tube (30). A rotary knob (50) for moving the extrusion rod (40) in the axial direction;
The main body cylinder (30) is provided with a filling cylinder part (31) in which a filling chamber (32) for filling a toothpaste paste is provided on the tip side connecting the toothbrush part (10),
The push rod (40) is provided with a piston (41) at the tip which moves the filling tube portion (31) in the axial direction to push out the toothpaste, and a male screw (42) is provided on the rear side of the piston (41). And
The rotary knob (50) is connected to the main cylinder (30) so that it can rotate but does not move in the axial direction, and the female screw (34), (52) meshes with the male screw (42) of the push rod (40). Is rotated relative to the male screw (42) of the extrusion rod (40),
The rotary knob (50) rotates the female screws (34), (52) meshing with the male screw (42) of the push rod (40) relative to the push rod (40), and the push rod (40). Is a toothbrush in which the piston (41) of the push rod (40) pushes the tooth paste in the filling chamber (32) toward the toothbrush portion (10). The main body cylinder (30) is provided with a female screw cylinder part (33) provided with an internal thread (34) on the inner surface on the rear end side of the filling cylinder part (31), and the push rod (40) A male screw (42) that meshes with the female screw (34) of the female screw cylindrical part (33) is provided at the end, and a non-circular shaft hole (44) is opened at the rear end in the axial direction at the center. The rotary knob (50) includes a non-circular shaft (54) that is inserted into the non-circular shaft hole (44) of the extrusion rod (40) so as to move in the axial direction but not to rotate relatively. ,
The rotary knob (50) rotates the extrusion rod (40) through the non-circular shaft (54), and the male screw (42) of the rotating extrusion rod (40) is rotated by the female screw (33). 34), the push rod (40) is moved in the axial direction, and the piston (41) of the push rod (40) pushes the tooth paste of the filling chamber (32) toward the toothbrush portion (10). The toothbrush according to claim 1 formed. The piston (41) of the push rod (40) is disposed in the filling chamber (32) so that it can move in the axial direction without rotating, and the push rod (40) protrudes rearward of the piston (41). A male screw shaft (43) is provided, and a female screw hole (53) that meshes with the male screw shaft (43) of the extrusion rod (40) is provided in the central shaft portion of the rotary knob (50). ,
The rotary knob (50) rotates the female screw hole (53), and the female screw hole (53) moves in the axial direction on the male screw shaft (43) of the push rod (40) and is filled with the piston (41). The toothbrush according to claim 1, wherein the toothpaste in the chamber (32) is extruded toward the toothbrush portion (10). An intermediate cylinder (60) is disposed inside the rotary knob (50), and a female screw (52) is provided on the inner surface of the rotary knob (50), and the male screw (61) meshes with the female screw (52). Is provided on the outer side of the intermediate cylinder (60), the intermediate cylinder (60) is provided with an intermediate female screw hole (63) on the inner side, and the push rod (40) is connected to the intermediate female of the intermediate cylinder (60). A male screw shaft (43) that engages with the screw hole (63) is provided so as to protrude rearward of the piston (41),
The rotary knob (50) is rotated to move the intermediate cylinder (60) in the pushing direction of the piston (41), and the intermediate cylinder (60) moves the pushing rod (40) in the pushing direction of the piston (41). The toothbrush according to claim 1 formed as described above. The toothbrush portion (10) has a hollow connecting shaft (12) connected to the handle portion (20) so as to be rotatable, and innumerable hairs connected to the tip of the connecting shaft (12). The brush part (11), and the brush part (11) communicates with the hollow part of the connecting shaft (12) and opens a discharge port (14) for discharging the toothpaste paste to the outside,
The handle portion (20) includes a discharge pipe (73) having one end connected to the filling chamber (32) of the main body cylinder (30), and the discharge pipe (73) is connected to the hollow portion of the connection shaft (12). It is inserted so that it can rotate, and an open / close hole (74) that supplies toothpaste to the discharge port (14) of the brush part (11) is opened,
The toothbrush portion (10) is rotated with respect to the handle portion (20), and the opening and closing hole (74) of the discharge pipe (73) is opened and closed by the discharge port (14) of the brush portion (11). The toothbrush described in 1.   The toothbrush part (10) is connected to the handle part (20) via the stopper mechanism (80), and the stopper mechanism (80) specifies the connecting position of the toothbrush part (10) and the handle part (20) to open and close it. The toothbrush according to claim 5, wherein the tooth paste is discharged by connecting the hole (74) to the discharge port (14). The stopper mechanism (80) includes an elastic arm (15) provided on the connecting shaft (12), and a locking portion (75) provided on the main body cylinder (30) for locking the tip of the elastic arm (15). The toothbrush according to claim 6, wherein the toothbrush part (10) is connected to a specific position of the handle part (20) by guiding the elastic arm (15) to the locking part (75).

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