JP2002068331A - Liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid container which is excellent in molding properties and assembling characteristics, which is suitable for mass production, and whose practical use has been made possible. SOLUTION: The liquid container comprises: a main body 12 having a tank part T for containing a liquid and feed port 12b which is provided on the forward end side thereof; a piston 22 which moves forward in the tank part T; a piston rod 24 which makes it possible to push out the piston 22 forward and which is provided with a male screw 24a formed on a peripheral face thereof; an operation cylinder 30 mounted to a rear part of the main body 12 in a relatively rotatable manner; a piston rod guide 26 in which a female tapped hole 26a to be threadably coupled to the male screw 24a formed on the piston rod 24 is defined and which rotates integrally with the operation cylinder 30; a ratchet cylinder 27 which is fixed to a rear inner part of the main body 12, in which an insert hole 27e for allowing the piston rod 24 to insert therethrough in a relatively unrotatable manner is defined, and on which ratchet teeth 27c are formed; a rotary cam 32 having ratchet teeth 32b to be meshed with the ratchet teeth 27c of the ratchet cylinder 27; and a return spring 34 for urging the rotary cam 32 toward the ratchet cylinder 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container containing a liquid such as a cosmetic ink, a writing ink, and a correction liquid, and having a liquid supply port at a tip end thereof.

[0002]

2. Description of the Related Art Conventionally, as a container for accommodating this kind of liquid, for example, there is a container described in Japanese Utility Model Publication No. 6-14844. The liquid container described in this publication includes a shaft body having a coating liquid storage section formed therein, a screw rod protruding from a piston slidably fitted in the storage section, an inner cylinder member and an outer cylinder member. Are integrally connected to each other. The outer cylindrical member of the rotating cylinder is integrally formed with a ring ridge and a locking claw that can be resilient in the axial direction at the front end, and the ring ridge of the outer cylindrical member is press-fitted into the ring groove at the rear end of the shaft body. The rotatable cylinder is rotatably connected to the outer cylinder member, and the locking claw of the outer cylinder member is elastically engaged with a ratchet tooth integrally formed in the circumferential direction in the shaft to constitute a ratchet mechanism. Also, a screw hole was provided in the inner cylinder member of the rotary cylinder, and the above-mentioned screw rod was screwed together, and two flat portions formed on both sides over the entire length of the screw rod were formed in the partition at the rear end of the storage portion of the shaft body. It is configured to slidably fit in the slide hole, advance without rotating the screw rod by rotation of the rotary cylinder, and press the piston in the axial direction to supply the application liquid.

When the rotary cylinder is rotated with respect to the shaft, the screw rod is slidably fitted in a slide hole formed in the partition at the rear end of the storage portion of the shaft. Relative rotation occurs between the cylinder member and the screw rod, and the screw rod advances by the screwing of the screw hole of the inner cylinder member of the rotating cylinder with the screw rod, thereby pressing the piston in the axial direction to apply the coating liquid. It can be supplied to the tip of the shaft.

[0004]

However, in the liquid container described in this publication, a partition is formed at the rear end of the storage portion of the shaft, and a slide hole is formed in the partition so as to be fitted with the two flat portions of the threaded rod. Must be formed, and ratchet teeth must be formed integrally with the inner circumferential direction of the shaft body.
There is a problem that it is difficult to manufacture the shaft body in molding. Further, a locking claw must be formed on the outer cylinder member. Furthermore, when assembling, the piston and the screw rod are inserted from the front of the shaft body, the screw rod is passed through the slide hole of the partition, and then the rotary cylinder is inserted from the rear of the shaft body. The screw shaft must be screwed into the screw hole of the inner cylinder member of the rotating cylinder,
There is a problem that assembly is difficult. For this reason, it is difficult to manufacture a mass-produced product that can be put to practical use with the configuration of the liquid container disclosed in the above publication.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid container which has excellent moldability and assemblability, is suitable for mass production, and can be put to practical use.

[0006]

In order to achieve the above object, a liquid container according to the first aspect of the present invention has a main body having a tank portion for storing a liquid and a supply port at a front end side. A piston advancing in the tank portion, a piston rod capable of pushing the piston forward and having a male thread formed on a peripheral surface, an operating cylinder mounted rotatably at a rear portion of the main body, and a male thread of the piston rod A female screw hole is formed which is screwed into the operating cylinder, a piston rod guide which rotates integrally with the operation cylinder, and an insertion hole which is fixed to the rear inside of the main body and through which the piston rod is inserted so as to be relatively non-rotatable are formed. A ratchet cylinder having ratchet teeth, a rotating cam having ratchet teeth meshing with the ratchet teeth of the ratchet cylinder, and an elastic body for urging the rotating cam toward the ratchet cylinder. Characterized in that it has a.

When the operating cylinder is rotated with respect to the main body, a piston rod guide that rotates integrally with the operating cylinder rotates. On the other hand, since the piston rod inserted into the ratchet cylinder fixed to the main body so as not to rotate relatively does not rotate, relative rotation occurs between the piston rod guide and the piston rod,
The screwing between the female screw hole of the piston rod guide and the male screw of the piston rod causes the piston rod to advance and push the piston. In this way, the piston moves forward in the tank portion, so that the liquid in the tank portion is pressed against the supply port provided on the distal end side of the main body and can be supplied.

The ratchet teeth formed on the rotating cam that rotates integrally with the operating cylinder mesh with the ratchet teeth formed on the ratchet cylinder, so that the operation of the ratchet teeth of the rotating cam and the ratchet teeth of the ratchet cylinder causes the operation. A sense of moderation can be given to the user, and the operating cylinder can be prevented from rotating in the opposite direction, that is, in the direction for retracting the piston.

The ratchet teeth are formed in the rotary cam and the ratchet cylinder, and the insertion hole through which the piston rod is inserted so as not to rotate relative to each other is formed in the ratchet cylinder, so that its manufacture is simple. Also, the assembling work can be performed by inserting the ratchet cylinder, the piston, the piston rod, the piston rod guide, and the operation cylinder all from the rear of the main body, and it is also possible to unitize these parts, and the assembly can be performed. Easy to do.

According to a second aspect of the present invention, in the liquid container according to the first aspect, the piston, the piston rod, the piston rod guide, the ratchet cylinder, the rotating cam, and the elastic body include:
In addition to the main body, a unit that can be integrally assembled is configured. With the integrated unit, the assembly of the liquid container can be performed more easily.

[0011] The invention according to claim 3 is the invention according to claim 1 or 2.
In the liquid container described above, a regulating means for regulating a rearward position of the piston rod guide is further provided, and the elastic body is interposed between the rotating cam and the piston rod guide. By regulating the rear position of the piston rod guide, the elastic body urges the rotating cam toward the ratchet cylinder.

According to a fourth aspect of the present invention, in the liquid container according to the third aspect, the regulating means protrudes in an inner diameter direction at a position adjacent to a window hole formed in the ratchet cylinder and at the same circumferential position as the window hole. It is characterized by comprising a projection and an annular projection provided on the piston rod guide and locked by the projection.

According to a fifth aspect of the present invention, in the liquid container according to the third aspect, the regulating means is a step formed inside the operating cylinder and in which the rear end of the piston rod guide abuts. I do.

According to a sixth aspect of the present invention, there is provided an operation device which includes a main body having a tank portion for accommodating a liquid and has a supply port on the tip end side, and a piston which advances in the tank portion, and which is attached to the main body so as to be relatively rotatable. A piston unit that advances the piston in the tank by rotation of the cylinder, wherein the piston unit constitutes a unit that can be integrally assembled separately from the main body. By assembling the piston unit separately from the main body as a unit, the liquid container can be easily assembled.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of the present invention.

In the drawing, reference numeral 10 denotes a liquid container,
The liquid container 10 is roughly divided into a main body 12 having a tank portion T in which a liquid L such as a correction liquid, a writing ink, and a cosmetic ink is accommodated, and having a liquid supply port 12b at a distal end, and a front portion of the main body 12. And a piston unit 21 provided at the rear of the liquid container 10.
And

The tip unit 13 includes a tip 14 into which the tip of the main body 12 is press-fitted, and a pipe holder 1 which is pressed into the rear part of the tip 14 and is sandwiched between the main body 12 and the tip 14.
6, the tip pipe 18 fixed to the tip of the pipe holder 16, and the tip of the tip pipe 18 is inserted into its base and the base is sandwiched between the pipe holder 16 and the tip 14 in the tip 14. And a brush (tip application body) 20. A brush 20 is provided around the tip 14 when not in use.
Is detachably attached.

The piston unit 21 includes a piston 22 slidable in the tank portion T and a piston 22
A piston rod 24 having a male screw 24a formed on the peripheral surface, a piston rod guide 26 having a female screw hole 26a screwed into the male screw 24a of the piston rod 24, and a piston. The tip of the rod guide 26 is rotatably supported by the shaft, and the piston rod 2
A ratchet cylinder 27 through which the piston rod guide 4 is inserted so as to be relatively non-rotatable, an operation cylinder 30 in which the piston rod guide 26 is disposed so as to be relatively non-rotatable inside the ratchet cylinder 27, and an operation cylinder 30 The rotation cam 32 is disposed between the rotation cam 32 and the piston rod guide 26 to urge the rotation cam 32 toward the ratchet cylinder 27. A return spring 34.

The piston unit 21 will be described in more detail. A plurality of vertical ribs 30c protruding in the inner diameter direction are formed at an inner rear portion of the operation cylinder 30, and a vertical groove 30d is formed between the adjacent vertical ribs 30c. The plurality of vertical grooves 30d are provided with the piston rod guide 2
A plurality of longitudinal ribs 26b formed on the outer peripheral surface of the rear end of the rear end 6 are fitted respectively, whereby the operating cylinder 30 and the piston rod guide 26 cannot rotate relative to each other, that is, rotate integrally. I have. Similarly, a plurality of vertical ribs 32a are formed on the outer peripheral surface of the rear end portion of the rotary cam 32, and the plurality of vertical ribs 32a are fitted into the plurality of vertical grooves 30d, respectively. The cylinder 30 and the rotary cam 32 are configured to be relatively movable in the axial direction and not to rotate relatively, that is, to rotate integrally.

The piston rod guide 26 has an annular projection 26c formed at its axial center. On the other hand, the ratchet cylinder 27 has a pair of window holes 2 at its axial center.
7a are formed, and as shown in FIG.
The inner diameter of the ratchet cylinder 27 changes from the front end of 7a as a boundary, and the inner diameter of the ratchet cylinder 27 is larger at the rear than at the front. In the rear end edge portion of the window hole 27a, a D-shaped projection 27b is formed at the same portion in the circumferential direction as the window hole 27a and protrudes toward the inner diameter side as viewed in FIG. The interval between the portions 27b is equal to the inner diameter at the front edge of the window hole 27a. By engaging the annular projection 26c of the piston rod guide 26 with the projection 27b of the ratchet cylinder 27, the piston rod guide 26 is rotatable with respect to the ratchet cylinder 27 and is prevented from falling out from the rear of the ratchet cylinder 27. The rearward movement of the piston rod guide 26 is restricted. The annular protrusion 26c and the protruding portion 27b constitute a regulating means for regulating the backward movement of the piston rod guide 26.

The tip of the rotating cam 32 has a ratchet tooth 3
2b is formed, and one ratchet cylinder 27
A ratchet tooth 27c that meshes with the ratchet teeth 32b is formed at the rear end of the rotary cam 32 so that the rotary cam 32 can rotate only in one direction with respect to the ratchet cylinder 27. When the rotating cam 32 rotates in a rotational direction allowed with respect to the ratchet cylinder 27, the rotating cam 32 can rotate while compressing the return spring.

Also, as shown in FIG.
Reference numeral 4 denotes a non-circular shape in which a cross section is partially cut out from a circular shape, in this embodiment, an oval shape, and a ratchet cylinder 27 having an oval shape matching the cross-sectional shape of the piston rod 24 is inserted. An inner cylindrical portion 27f having a hole 27e is formed. As shown in the drawing, the piston rod 24 penetrates through the insertion hole 27e of the inner cylindrical portion 27f, so that the piston rod 24 cannot rotate relative to the ratchet cylinder 27. Furthermore, ratchet cylinder 2
7, a part of the outer peripheral surface is a ribbed outer peripheral surface 27g, and a ribbed hole 1 formed in a part of the inner peripheral surface of the main body 12 is formed.
2c. A detent structure is formed by the ribbed outer peripheral surface 27g and the ribbed hole 12c, and the ratchet cylinder 27 cannot rotate relative to the main body 12. Of course, it is also possible to prevent the ratchet cylinder 27 and the main body 12 from rotating by using a knurl fitting structure, a key and a key groove fitting structure other than the rib fitted structure.
Since the ratchet cylinder 27 is prevented from rotating with respect to the piston rod 24, the piston rod 24 cannot rotate relative to the main body 12 as a result. Also,
Tapered surface 27h formed adjacent to ribbed outer peripheral surface 27g of ratchet cylinder 27 and reduced in diameter as going forward.
Is in contact with a tapered surface 12a formed on the inner peripheral surface of the main body 12 and reduced in diameter as going forward. The ratchet cylinder 27 is sandwiched between the tapered surface 12a of the main body 12 and the operation cylinder 30, and is fixed to the main body 12.

An annular projection 30 is provided on the inner peripheral surface of the distal end of the operation cylinder 30.
e is formed, and the annular projection 30e is fitted in an annular groove 27d formed on the outer periphery in front of the window hole 27a of the ratchet cylinder 27.
0 is connected to the ratchet cylinder 27 so as to be relatively rotatable.
An annular projection 30a is formed on a front outer peripheral surface of the operation cylinder 30, and the annular projection 30a is fitted into an annular groove 12d formed on a rear inner peripheral surface of the main body 12, whereby The operation cylinder 30 is attached to the main body 12 so as to be relatively rotatable.

The assembly of the liquid container 10 described above can be performed as follows.

First, the assembly of the piston unit 21 will be described. First, the piston rod 24 is attached to the piston 22.
Press in the tip of. Also, the return spring 34
Is mounted on the outer periphery of the piston rod guide 26 from the distal end thereof, and the rotating cam 32 is also mounted on the outer periphery of the piston rod guide 26 from the distal end. In this state, the distal end of the piston rod guide 26 is inserted into the ratchet cylinder 27. Then, the annular projection 26c is pushed from behind the projection 27b and passed therethrough to be locked at the tip of the projection 27b. Next, the circumferential positions of the vertical ribs 26b of the piston rod guide 26 and the vertical ribs 32a of the rotary cam 32 are aligned with the vertical grooves 30d of the operation cylinder 30, and the rear end of the piston rod guide 26 The rotating cam 32 is inserted, and the annular projection 30e of the operation cylinder 30 is fitted into the annular groove 27d of the ratchet cylinder 27. Further, the piston rod 24 is connected to the ratchet cylinder 27.
And screwed into the female screw hole 26a of the piston rod guide 26. Thus, the piston unit 2
1 is completed as an integral unit.

The assembling of the leading tool unit 13 is performed as follows. That is, the tip pipe 18 is pressed into the pipe holder 16 to be set. Then, the brush 20 is inserted from the rear end of the tool 14, and the set of the pipe holder 16 and the tip pipe 18 prepared as described above is inserted into the hole in the center of the brush 20 while passing the tip pipe 18. It is press-fitted and fixed in the tool 14. And cap 3
6 is attached to the leading tool 14 to complete the leading tool unit.

Next, the piston unit 2
1 is inserted from the rear end opening, the outer peripheral surface 27g with the rib of the ratchet cylinder 27 is fitted into the hole 12c with the rib of the main body 12, and the tapered surface 27h of the ratchet cylinder 27 is
Piston unit 2 until it comes into contact with the tapered surface 12a of
Press 1. Then, the annular projection 30a of the operation cylinder 30 is fitted into the annular groove 12d of the main body 12, and the main body 12 and the piston unit 21 are fixed.

Next, the liquid L is injected from the front end opening of the main body 12, and then the leading unit 13 is press-fitted and fixed to the main body 12 to complete the operation.

When the liquid container 10 constructed as described above is used, the cap 36 is removed and the application is performed using the brush 20. However, when it is desired to further supply the liquid from the brush 20, the operation cylinder 30 is connected to the main body. Rotate with respect to 12.

When the operation cylinder 30 is rotated with respect to the main body 12, the piston rod guide 26 rotates together with the operation cylinder 30. On the other hand, since the piston rod 24 fitted into the insertion hole 27e of the ratchet cylinder 27 fixed to the main body 12 does not rotate, relative rotation occurs between the piston rod guide 26 and the piston rod 24, and the piston rod guide 2
6 female screw hole 26a and male screw 24 of piston rod 24
The piston rod 24 moves forward due to the screwing between the piston rod 24 and the a. As the piston 22 advances in the tank portion T, the liquid L in the tank portion T is pressed to the supply port 12b provided on the distal end side of the main body 12, passes through the distal end pipe 18, and is supplied from the distal end of the brush 20. You can use it.

When the operation cylinder 30 rotates, the rotary cam 32 rotates together with the operation cylinder 30. The rotation cam 32 rotates while compressing the return spring 34 while the ratchet teeth 32 b of the rotation cam 32 slide on the slope of the ratchet teeth 27 c of the ratchet cylinder 27. The ratchet teeth 32b and 27c mesh with each other to generate a clicking sound, and the user can obtain a sense of moderation. Further, if the user tries to rotate the operation cylinder 30 in the opposite direction by mistake, the ratchet teeth 32b of the rotary cam 32 and the ratchet teeth 27c of the ratchet cylinder 27 mesh with each other to prevent relative rotation.
The rotation cam 32 and the operation cylinder 30 cannot be rotated. Therefore, the operation cylinder 30 is always rotated only in the direction in which the piston 22 advances in the tank portion T.

Next, FIG. 4 is a rear view showing a second embodiment of the present invention. In the figure, the front part is the same as that of the first embodiment, so that the illustration is omitted, and the same parts and components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the figure, the piston unit 21 '
A piston 22, a piston rod 24, a piston rod guide 26 ′ in which a female screw hole 26 a screwed to a male screw 24 a of the piston rod 24 is formed, and a tip of the piston rod guide 26 ′ is inserted. 24 is a ratchet cylinder 27 'that is inserted so that it cannot rotate relatively.
An operating cylinder 30 ′ which is connected to the ratchet cylinder 27 ′ so as to be relatively rotatable and in which the piston rod guide 26 is disposed so as to be relatively non-rotatable therein, a rotating cam 32, and a return spring 34. I have.

In this embodiment, a plurality of vertical ribs 30c 'projecting in the inner diameter direction are formed at the inner rear portion of the operation cylinder 30', and the vertical rib 30c 'has a stepped portion whose rib height changes. 30f is provided, and behind the step portion 30f,
The rib height is further increased, so that the body of the piston rod guide 26 abuts the step 30f and cannot move further backward. Thus, the piston rod guide 26 'is formed by the step portion 30f.
Is restricted, and the step 30f constitutes a restricting means for restricting the rearward movement of the piston rod guide 26 '.

In assembling the piston unit 21 ', the tip of the piston rod 24 is pressed into the piston 22. The return spring 34 is connected to the piston rod guide 2.
6 ′ is attached to the outer periphery of the piston rod guide 26 ′, and the rotating cam 32 is also attached to the outer periphery of the piston rod guide 26 ′.
The piston rod guide 2 is inserted into the vertical groove 30d of the operation cylinder 30 '.
The rear end of the piston rod guide 26 'and the rotary cam 32 are inserted into the operation cylinder 30' by aligning the circumferential positions of the vertical rib 26b of 6 'and the vertical rib 32a of the rotary cam 32.
Then, the tip of the piston rod guide 26 'is inserted into the ratchet cylinder 27', and the annular projection 30e of the operation cylinder 30 'is inserted.
Into the annular groove 27d of the ratchet cylinder 27 '. Further, the piston rod 24 is inserted from the front of the ratchet cylinder 27 ', and the female screw hole 2 of the piston rod guide 26' is inserted.
6a. Thus, the piston unit 21 '
Is completed as an integral unit. The rest of the assembly and its operation are the same as in the first embodiment, and a description thereof will be omitted.

As described above, according to each embodiment, the ratchet cylinder 27, 27 '
The ratchet teeth 27c are formed at 7, 27 ', and the insertion hole 27e of the inner cylindrical portion 27f is formed so as to fit with the piston rod 24 so as not to rotate relatively.
Such ratchet cylinders 27, 27 'can be easily formed. Similarly, the rotary cam 32 formed with the ratchet teeth 32b can be easily formed. On the other hand, there is no need to form such ratchet teeth or through holes for allowing the piston rod 24 to pass through the main body 12 so that they cannot rotate relative to each other. Therefore, the main body 12 can be easily formed with high yield. In addition, there is no need to form a locking claw as in the conventional example, and molding can be performed with high yield.

In the assembly operation, the piston 22,
Piston rod 24, ratchet cylinders 27 and 27 ', piston rod guides 26 and 26', operation cylinders 30 and 30 ',
This can be performed by inserting the piston units 21 and 21 ′ including the rotating cam 32 and the return spring 34 from the rear of the main body 12, and the assembly can be performed easily. However, the operation cylinders 30 and 30 'need not necessarily be included in the piston units 21 and 21'. That is, instead of forming the annular projection 30e of the operation cylinders 30 and 30 'and the annular groove 27d of the ratchet cylinder 27 into which the operation is performed, the piston 22, the piston rod 24, the ratchet cylinder 27,
27 ', the piston rod guides 26, 26', the piston units 21, 21 'composed of the rotary cam 32 and the return spring 34 are inserted from the rear of the main body 12, and then the operation cylinders 30, 30' are inserted into the main body 12. Alternatively, the annular projection 30a of the operation cylinder 30 may be fitted into the annular groove 12d of the main body 12.

[0038]

As described above, according to the present invention,
A rotating cam having a ratchet cylinder separately from the main body, forming ratchet teeth at the rear end of the ratchet cylinder, and forming an insertion hole through which the piston rod is inserted so as to be relatively non-rotatable, and further having a ratchet tooth formed thereon And an elastic body for urging the rotating cam toward the ratchet cylinder, so that the liquid container is excellent in moldability and assemblability, and is most suitable for mass production and practical use.

Alternatively, according to the present invention, apart from the main body,
By assembling the piston unit integrally, the liquid container can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a liquid container of the present invention, and a partial internal mechanism is a half sectional view.

2 (a) and 2 (b) are partial cross-sectional perspective views of a main part of the ratchet cylinder of FIG. 1, and FIG. 2 (a) is 2a-2 of FIG.
It is sectional drawing seen along the a line.

FIG. 3 is an end view taken along line 3-3 in FIG. 1;

FIG. 4 is a rear vertical sectional view showing a second embodiment of the liquid container of the present invention, and a partial internal mechanism is a half sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid container 12 Main body 21, 21 'Piston unit 22 Piston 24 Piston rod 24a Male screw 26, 26' Piston rod guide 26a Female screw hole 26c Annular projection 27, 27 'Ratchet cylinder 27a Window hole 27b Projection 27c Ratchet tooth 27e Insertion Hole 30, 30 'Operating cylinder 30f Step 32 Rotating cam 32b Ratchet tooth 34 Return spring (elastic body)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadao Odaka 138, Kurei, Kawagoe-shi, Saitama F-term in Kotobukigawago Factory (reference) 2C350 GA05 KC21 KF05 3E014 PA01 PB03 PC03 PE08 PE25 PF10 4F042 AA01 FA29 FA30 FA35

Claims (6)

[Claims] 1. A main body having a tank portion for accommodating a liquid and having a supply port on the tip side, a piston advancing in the tank portion, and a piston capable of pushing the piston forward and having an external thread formed on a peripheral surface. A piston rod, an operating cylinder rotatably attached to a rear portion of the main body, a female threaded hole screwed into a male screw of the piston rod, and a piston rod guide rotating integrally with the operating cylinder; A ratchet cylinder formed with an insertion hole through which the piston rod is inserted so as to be relatively non-rotatable and having ratchet teeth, and a ratchet tooth meshing with the ratchet teeth of the ratchet cylinder. A rotating cam that rotates in a direction; an elastic body that biases the rotating cam toward the ratchet cylinder;
A liquid container comprising: 2. The liquid container according to claim 1, wherein the piston, the piston rod, the piston rod guide, the ratchet cylinder, the rotating cam, and the elastic body constitute a unit that can be integrally assembled separately from the main body. A liquid container characterized by the above-mentioned. 3. The liquid container according to claim 1, further comprising a restricting means for restricting a rear position of the piston rod guide, wherein the elastic body is interposed between the rotating cam and the piston rod guide. A liquid container characterized by the above-mentioned. 4. The liquid container according to claim 3, wherein the restricting means is adjacent to a window formed in the ratchet cylinder and projects in the radial direction at the same circumferential position as the window, and a piston rod. A liquid projection provided on the guide and an annular projection locked by the projection. 5. The liquid container according to claim 3, wherein the restricting means is a step formed inside the operating cylinder and in contact with a rear end of a piston rod guide. 6. A main body having a tank portion for accommodating a liquid and having a supply port on the tip side, and a piston advancing in the tank portion, the operation cylinder being rotatably attached to a rear portion of the main body and being rotated. A liquid container, comprising: a piston unit for moving the piston forward in a tank portion; wherein the piston unit constitutes a unit that can be integrally assembled separately from the main body.