Pumps and pump-type products

Abstract

To provide a pump and a pump product capable of reducing the possibility that a first cylinder part and a second cylinder part may separate from each other in normal use.SOLUTION: In a pump 30 of a pump product 10, an upper cylinder part 50 comprises a movement prevention part extending in a direction orthogonal to a direction indicated by an arrow 30a, and a lower cylinder part 60 comprises a movement prevention part 63a extending in a direction orthogonal to the direction indicated by the arrow 30a. The upper cylinder part 50 and the lower cylinder part 60 are configured such that by rotating one of the upper cylinder part 50 and the lower cylinder part 60 with respect to the other in a rotational direction around a central axis 41 extending in the direction indicated by the arrow 30a, the contact between the movement prevention part of the upper cylinder part 50 and the movement prevention part 63a is released, and thus can be separated from each other, so that a metal spring 31 and a ball 32 can be taken out from the inside of a cylinder 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pump for a pump-type product and to a pump-type product. [Background technology]

[0002] A known pump in a conventional pump-type product includes a cylinder having a first cylinder portion and a second cylinder portion attached to the first cylinder portion, and a metal part disposed inside the cylinder (see, for example, Patent Document 1). In the pump described in Patent Document 1, the first cylinder portion and the second cylinder portion of the cylinder can be separated from each other, allowing the metal part to be removed from inside the cylinder itself. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-337654 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the pump described in Patent Document 1, the first and second cylinder portions are separated from each other by the cylinder being bent at the thin-walled portion formed between them, which poses a problem in that it is not easy to design the thin-walled portion so that it will not be broken and the first and second cylinder portions separated from each other by an external force in the extension direction of the cylinder, such as the biasing force of a spring inside the cylinder, during normal use.

[0005] Therefore, an object of the present invention is to provide a pump and a pump-type product that can reduce the possibility that the first cylinder portion and the second cylinder portion will become separated from each other during normal use. [Means for solving the problem]

[0006] The pump of the present invention is a pump for a pump-type product, comprising a cylinder and a metal part disposed inside the cylinder, the cylinder comprising a first cylinder portion and a second cylinder portion attached to the first cylinder portion, the first cylinder portion and the second cylinder portion being separated so that the part can be removed from inside the cylinder itself, the first cylinder portion comprising a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in a direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder, and the second cylinder portion the cylinder portion includes a second cylinder movement prevention part that comes into contact with the first cylinder movement prevention part to prevent movement of the second cylinder portion relative to the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion in the extension direction, the first cylinder movement prevention part and the second cylinder movement prevention part extend in a direction perpendicular to the extension direction, and the first cylinder portion and the second cylinder portion are rotated relative to one another in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention part and the second cylinder movement prevention part and making them separable from each other.

[0007] With this configuration, the pump of the present invention has the first cylinder movement prevention part and the second cylinder movement prevention part extending in a direction perpendicular to the extension direction of the cylinder, and by rotating one of the first cylinder part and the second cylinder part relative to the other in a rotational direction around an axis extending in the extension direction of the cylinder as the rotation center, the contact between the first cylinder movement prevention part and the second cylinder movement prevention part is released and the first cylinder part and the second cylinder part can be separated from each other.This reduces the possibility of the first cylinder part and the second cylinder part being separated from each other by external forces in the extension direction of the cylinder, such as the biasing force of a spring inside the cylinder, during normal use.

[0008] In the pump of the present invention, the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at an end in a second rotation direction opposite to the first rotation direction, the first cylinder portion preventing rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction of the rotation directions by contacting the second cylinder portion, and has a convex portion to be overcome on an outer surface of the first cylinder portion that can be overcome by a part of the second cylinder portion when one of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other of the first cylinder portion and the second cylinder portion, the first cylinder portion has a first cylinder second rotation direction rotation prevention portion at an end in the first rotation direction, the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at an end in the first rotation direction, the second cylinder first rotation direction rotation prevention portion preventing rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and the other of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other of the first cylinder portion and the second cylinder portion. the second cylinder portion includes, on its inner circumferential surface, a jumping convex portion that jumps over the jump-over convex portion when the second cylinder portion is rotated in the second rotation direction, the second cylinder portion includes a second cylinder second rotational direction rotation preventing portion that prevents rotation of the second cylinder portion relative to the first cylinder portion in the second rotational direction by coming into contact with the first cylinder second rotational direction rotation preventing portion, the first cylinder portion and the second cylinder portion are arranged at a locking position where, after the jumping convex portion jumps over the jump-over convex portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other, and the first cylinder portion and the second cylinder second rotational direction rotation preventing portion face each other,The overcoming convex portion may be disposed at an unlocking position where the overcoming convex portion has overcome the to-be-overcome convex portion.

[0009] With this configuration, the pump of the present invention rotates the second cylinder portion in the second rotation direction relative to the first cylinder portion, and after the overriding convex portion overcomes the overcome-to-be-overridden convex portion, the first cylinder portion and the second cylinder portion are positioned in a locked position, thereby reducing the possibility that the first cylinder portion and the second cylinder portion will separate from each other during normal use.

[0010] In the pump of the present invention, at least one of the following may be satisfied: the length of the convex portion to be overcome in the rotational direction is shorter than the length of the first cylinder movement prevention portion in the rotational direction; and the length of the convex portion to overcome in the rotational direction is shorter than the length of the second cylinder movement prevention portion in the rotational direction.

[0011] With this configuration, in the pump of the present invention, when the length of the convex portion to be climbed over in the rotational direction is shorter than the length of the first cylinder movement prevention portion in the rotational direction, even if the length of the first cylinder movement prevention portion in the rotational direction is increased to reduce the possibility of the first cylinder portion and the second cylinder portion separating in the direction of extension of the cylinder when the first cylinder portion and the second cylinder portion are positioned in the locked position, the climbing convex portion can more easily climb over the climbing convex portion compared to a configuration in which the length of the convex portion to be climbed over in the rotational direction is equal to or greater than the length of the first cylinder movement prevention portion in the rotational direction, thereby making it easier for the worker to position the first cylinder portion and the second cylinder portion in the locked position or the unlocked position. Furthermore, in the pump of the present invention, when the length of the climbing convex portion in the rotational direction is shorter than the length of the second cylinder movement prevention portion in the rotational direction, even if the length of the second cylinder movement prevention portion in the rotational direction is increased to reduce the possibility of the first cylinder portion and the second cylinder portion separating in the extension direction of the cylinder when the first cylinder portion and the second cylinder portion are positioned in the locked position, the climbing convex portion can more easily climb over the to-be-climbed convex portion compared to a configuration in which the length of the climbing convex portion in the rotational direction is equal to or greater than the length of the second cylinder movement prevention portion in the rotational direction, thereby making it easier for the worker to position the first cylinder portion and the second cylinder portion in the locked position or the unlocked position.

[0012] In the pump of the present invention, at least one of the convex portion to be overcome and the convex portion for overcoming may be a portion that breaks when the first cylinder portion and the second cylinder portion are positioned in the locked position and the unlocked position.

[0013] With this configuration, when the first cylinder portion and the second cylinder portion are arranged in the locked position and then in the unlocked position, the pump of the present invention allows a worker assembling the cylinders to determine, based on the condition of the convex portion to be climbed over, whether the first cylinder portion has previously been arranged in the locked position and then in the unlocked position if the convex portion to be climbed over breaks.Furthermore, when the first cylinder portion and the second cylinder portion are arranged in the locked position and then in the unlocked position, the pump of the present invention allows a worker assembling the cylinders to determine, based on the condition of the convex portion to be climbed over, whether the second cylinder portion has previously been arranged in the locked position and then in the unlocked position if the convex portion to be climbed over breaks.

[0014] In the pump of the present invention, the first cylinder portion and the second cylinder portion may be provided with a mark that indicates the unlocked position.

[0015] With this configuration, the pump of the present invention has the first cylinder portion and the second cylinder portion provided with markers that indicate the unlocked position, so that the worker separating the first cylinder portion and the second cylinder portion can easily place the first cylinder portion and the second cylinder portion in the unlocked position based on the markers, thereby facilitating the work of separating the first cylinder portion and the second cylinder portion.

[0016] In the pump of the present invention, at least one of the first cylinder portion and the second cylinder portion may be provided with a knob for an operator to hook his or her fingers onto when rotating one of the first cylinder portion and the second cylinder portion relative to the other in the rotational direction.

[0017] With this configuration, the pump of the present invention has a knob on at least one of the first and second cylinder sections that can be hooked with the fingers of an operator who rotates one of the first and second cylinder sections in a rotational direction relative to the other, thereby facilitating the operation of rotating one of the first and second cylinder sections in a rotational direction relative to the other, and as a result, facilitating the operation of separating the first and second cylinder sections.

[0018] The pump-type product of the present invention is characterized by including the pump described above.

[0019] With this configuration, the pump-type product of the present invention can reduce the possibility that the first and second cylinder portions will become separated from each other during normal use. [Effects of the Invention]

[0020] The pump and pump-type product of the present invention can reduce the likelihood that the first and second cylindrical portions will become separated from each other during normal use. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view of a portion of a pump-type product according to one embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the upper cylinder portion shown in FIG. [Figure 3] FIG. 3 is a top end view of the upper cylinder portion shown in FIG. 2. [Figure 4] 4 is a top end view of the upper cylinder part when cut along a cutting plane different from the cutting plane shown in FIG. 3. FIG. [Figure 5] FIG. 2 is a perspective view of the lower cylinder portion shown in FIG. [Figure 6] FIG. 6 is a top end view of the lower cylinder portion shown in FIG. 5. [Figure 7]7(a) is a front view of a portion of the cylinder shown in FIG. 1 just before the insertion portion of the upper cylinder portion is inserted into the hole of the lower cylinder portion. (b) is a front view of a portion of the cylinder shown in FIG. 7(a) when the lower cylinder portion is substantially omitted except for the lock portion. [Figure 8] 8(a) is a front view of a portion of the cylinder shown in FIG. 1 immediately after the insertion portion of the upper cylinder portion has been inserted into the hole of the lower cylinder portion. (b) is a front view of a portion of the cylinder shown in FIG. 8(a) when the lower cylinder portion is substantially omitted except for the locking portion. [Figure 9] 9(a) is a front view of a portion of the cylinder shown in FIG. 1 in a state where the inclined portion of the upper cylinder portion is in contact with the inclined portion of the lower cylinder portion, and FIG. 9(b) is a front view of a portion of the cylinder in a state shown in FIG. 9(a) in which the lower cylinder portion is substantially omitted except for the locking portion. [Figure 10] 10(a) is a front view of a portion of the cylinder shown in FIG. 1 in a state where the upper and lower cylinder portions are prevented from rotating relative to each other, and FIG. 10(b) is a front view of a portion of the cylinder shown in FIG. 10(a) in a state where the lower cylinder portion is substantially omitted except for the locking portion. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] First, the configuration of a pump-type product according to one embodiment of the present invention will be described.

[0024] FIG. 1 is a cross-sectional view of a portion of a pump-type product 10 according to the present embodiment.

[0025] As shown in FIG. 1, the pump-type product 10 includes a container 20 for storing contents, and a pump 30 attached to the container 20.

[0026] The container 20 is formed with an opening 21 for inserting the pump 30. The opening 21 has a male thread 21a formed on the outer periphery.

[0027] pump 30 includes a cylinder 40, a piston 70 disposed inside cylinder 40 so as to be movable in the direction of extension of cylinder 40, i.e., the directions indicated by arrows 30a and 30b, a spring 31 disposed inside cylinder 40 relative to piston 70 in the direction indicated by arrow 30a and biasing piston 70 in the direction indicated by arrow 30b, a ball 32 disposed inside cylinder 40 relative to spring 31 in the direction indicated by arrow 30a and constituting a check valve together with cylinder 40, a bushing 33 that contacts piston 70 to restrict movement of piston 70 in the direction indicated by arrow 30b, an annular packing 34 for sealing the gap between mouth 21 of container 20 and cylinder 40, a cap 35 having an internal thread 35a formed on its inner periphery to mate with external thread 21a of container 20, a spout 36 attached to piston 70 for discharging the liquid content, and a dip tube 37 attached to cylinder 40 for circulating the contents of container 20 to cylinder 40.

[0028] The cylinder 40 includes an upper cylinder portion 50 as a first cylinder portion attached to the cap 35, and a lower cylinder portion 60 as a second cylinder portion attached to the upper cylinder portion 50.

[0029] Fig. 2 is a perspective view of the upper cylinder portion 50. Fig. 3 is a top end view of the upper cylinder portion 50. Fig. 4 is a top end view of the upper cylinder portion 50 when cut along a cut plane different from the cut plane shown in Fig. 3.

[0030] 1 to 4, upper cylinder portion 50 has vertical hole 50a extending in the directions indicated by arrows 30a and 30b, and horizontal hole 50b penetrating from the inner peripheral surface to the outer peripheral surface. Vertical hole 50a and horizontal hole 50b are in communication with each other.

[0031] The upper cylinder portion 50 has an insertion portion 51 at its end in the direction indicated by arrow 30a, which is inserted into the lower cylinder portion 60. The insertion portion 51 has an annular protrusion 52 on the outer peripheral surface of the end in the direction indicated by arrow 30a, which seals the gap between the upper cylinder portion 50 and the lower cylinder portion 60. The insertion portion 51 has an annular protrusion 53 on its outer peripheral surface in the direction indicated by arrow 30b, which has an outer diameter substantially the same as that of the protrusion 52, thereby preventing the upper cylinder portion 50 and the lower cylinder portion 60 from rattling relative to the other. The insertion portion 51 has a locking portion 54 on its outer peripheral surface, which prevents the upper cylinder portion 50 and the lower cylinder portion 60 from separating from each other.

[0032] The locking portion 54 has two L-shaped protrusions 55 that are approximately L-shaped. The two L-shaped protrusions 55 extend in the directions indicated by arrows 30a and 30b and are spaced 180° apart around the central axis 41 of the cylinder 40 as the center of rotation. That is, the locking portion 54 has two-fold symmetry around the central axis 41. The L-shaped protrusions 55 have a first protrusion 56 that extends in a first rotation direction indicated by arrow 40a around the central axis 41 as the center of rotation, and a second protrusion 57 that extends in the direction indicated by arrow 30a from the end of the first protrusion 56 in a second rotation direction indicated by arrow 40b that is opposite to the rotation direction indicated by arrow 40a.

[0033] The first convex portion 56 includes a movement prevention portion 56a at its end in the direction indicated by arrow 30b. The movement prevention portion 56a serves as a first cylinder movement prevention portion that prevents movement of the upper cylinder portion 50 relative to the lower cylinder portion 60 in the direction away from the lower cylinder portion 60, i.e., the direction indicated by arrow 30b, by contacting the lower cylinder portion 60. The movement prevention portion 56a extends in a direction perpendicular to the direction indicated by arrow 30b. The first convex portion 56 also includes a rotation prevention portion 56b at its end in the rotation direction indicated by arrow 40a. The rotation prevention portion 56b serves as a first cylinder second rotation direction rotation prevention portion that prevents rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b by contacting the lower cylinder portion 60. The wall surface of the first convex portion 56 that forms the rotation prevention portion 56b is inclined with respect to a plane extending radially of the upper cylinder portion 50. That is, the wall surface forming the rotation prevention portion 56b is inclined with respect to a plane perpendicular to the outer peripheral surface of the upper cylinder portion 50.

[0034] The second convex portion 57 includes a rotation prevention portion 57a ​​at its end in the rotation direction indicated by arrow 40b. The rotation prevention portion 57a ​​serves as a first-cylinder first-rotation direction rotation prevention portion that contacts the lower cylinder portion 60 to prevent rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40a. The wall surface of the second convex portion 57 that forms the rotation prevention portion 57a ​​is inclined with respect to a plane extending radially of the upper cylinder portion 50. That is, the wall surface that forms the rotation prevention portion 57a ​​is inclined with respect to a plane perpendicular to the outer circumferential surface of the upper cylinder portion 50. The second convex portion 57 includes an inclined portion 57b at its end in the rotation direction indicated by arrow 40a. The inclined portion 57b of the wall surface of the second convex portion 57 is inclined with respect to a plane extending radially of the upper cylinder portion 50. That is, the wall surface forming inclined portion 57b is inclined with respect to a plane perpendicular to the outer peripheral surface of upper cylinder portion 50. Second convex portion 57 is a portion that climbs over part of lower cylinder portion 60 when one of upper cylinder portion 50 and lower cylinder portion 60 is rotated relative to the other in the rotational directions indicated by arrows 40a and 40b, and constitutes the climb-over convex portion of the present invention. Note that the length of second convex portion 57 in the rotational direction indicated by arrow 40a is shorter than the length of movement-preventing portion 56a in the rotational direction indicated by arrow 40a.

[0035] The upper cylinder portion 50 has an operation mark 58 formed on its outer circumferential surface to indicate when the upper cylinder portion 50 and the lower cylinder portion 60 are to be separated from each other. The mark 58 is triangular in shape, with one vertex 58a at the tip in the direction indicated by the arrow 30a.

[0036] Figure 5 is a perspective view of the lower cylinder portion 60. Figure 6 is a top end view of the lower cylinder portion 60.

[0037] 1, 5, and 6, the lower cylinder portion 60 is formed with a hole 60a into which the insertion portion 51 of the upper cylinder portion 50 is inserted, a hole 60b into which the ball 32 is inserted, and a hole 60c into which the dip tube 37 is inserted. The holes 60a, 60b, and 60c are in communication with one another.

[0038] The lower cylinder portion 60 has a lock portion 61 on the inner circumferential surface forming the hole 60a, for preventing the upper cylinder portion 50 and the lower cylinder portion 60 from being separated from each other.

[0039] The locking portion 61 has two L-shaped protrusions 62 and two protrusions 65, each of which is substantially L-shaped. The two L-shaped protrusions 62 are spaced apart by 180° around the central axis 41 as the center of rotation. Similarly, the two protrusions 65 are also spaced apart by 180° around the central axis 41 of the cylinder 40 as the center of rotation. In other words, the locking portion 61 has two-fold symmetry around the central axis 41 as the center of rotation.

[0040] The L-shaped convex portion 62 has a first convex portion 63 extending in the rotational direction indicated by the arrow 40a, and a second convex portion 64 extending in the direction indicated by the arrow 30a from the end of the first convex portion 63 in the rotational direction indicated by the arrow 40a.

[0041] The first convex portion 63 is provided with a movement preventing portion 63a at its end in the direction indicated by arrow 30a as a second cylinder movement preventing portion that prevents movement of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the direction in which the lower cylinder portion 60 moves away from the upper cylinder portion 50, i.e., in the direction indicated by arrow 30a, by contacting the movement preventing portion 56a of the upper cylinder portion 50. The movement preventing portion 63a extends in a direction perpendicular to the direction indicated by arrow 30a.

[0042] The second convex portion 64 has a rotation prevention portion 64a at its end in the rotation direction indicated by arrow 40b, which serves as a second cylinder second rotation direction rotation prevention portion that prevents rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b by contacting the rotation prevention portion 56b of the upper cylinder portion 50. Of the wall surfaces of the second convex portion 64, the wall surface forming the rotation prevention portion 64a extends in the radial direction of the lower cylinder portion 60. In other words, the wall surface forming the rotation prevention portion 64a is perpendicular to the inner circumferential surface of the lower cylinder portion 60.

[0043] The protrusion 65 includes a rotation prevention portion 65a at its end in the rotation direction indicated by the arrow 40a. The rotation prevention portion 65a serves as a second cylinder first rotation direction rotation prevention portion that prevents rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by the arrow 40a by contacting the rotation prevention portion 57a ​​of the upper cylinder portion 50. The wall surface of the protrusion 65 that forms the rotation prevention portion 65a extends in the radial direction of the lower cylinder portion 60. That is, the wall surface that forms the rotation prevention portion 65a is perpendicular to the inner circumferential surface of the lower cylinder portion 60. The protrusion 65 includes an inclined portion 65b at its end in the rotation direction indicated by the arrow 40b. The wall surface of the protrusion 65 that forms the inclined portion 65b is inclined with respect to the plane that extends in the radial direction of the lower cylinder portion 60. That is, the wall surface forming the inclined portion 65b is inclined with respect to a plane perpendicular to the inner circumferential surface of the lower cylinder portion 60. The convex portion 65 is a portion that climbs over the second convex portion 57 of the upper cylinder portion 50 when one of the upper cylinder portion 50 and the lower cylinder portion 60 is rotated relative to the other in the rotational directions indicated by arrows 40a and 40b, and constitutes the climbing-over convex portion of the present invention. The length of the convex portion 65 in the rotational direction indicated by arrow 40a is shorter than the length of the movement-preventing portion 63a in the rotational direction indicated by arrow 40a.

[0044] The lower cylinder part 60 has two knobs 66 on its outer circumferential surface for the operator to place their fingers on when separating the upper cylinder part 50 and the lower cylinder part 60. The two knobs 66 are spaced 180° apart with the central axis 41 as the center of rotation.

[0045] The lower cylinder portion 60 has a mark 67 formed on its outer circumferential surface to indicate when the upper cylinder portion 50 and the lower cylinder portion 60 are to be separated from each other. The mark 67 is triangular in shape, with one vertex 67a at the tip in the direction indicated by the arrow 30b.

[0046] As shown in FIG. 1, the piston 70 includes a first piston portion 71 to which the spout 36 is attached, a second piston portion 72 attached to the first piston portion 71, and a seal valve 73 supported by the first piston portion 71 and the second piston portion 72 so as to be movable in the directions indicated by the arrows 30a and 30b.

[0047] The first piston portion 71 has a hole 71a into which the tip of the second piston portion 72 in the direction indicated by arrow 30b is inserted, and a flow path 71b that connects from the tip of the first piston portion 71 in the direction indicated by arrow 30a to the tip of the first piston portion 71 in the direction indicated by arrow 30b when the second piston portion 72 is attached to the first piston portion 71.

[0048] The second piston portion 72 is attached to the first piston portion 71 by inserting the tip of the second piston portion 72 in the direction indicated by arrow 30b into hole 71a. The second piston portion 72 is formed with a groove 72a for forming a gap between the second piston portion 72 and cylinder 40 when part of the outer circumferential surface of the second piston portion 72 is in close contact with part of the inner circumferential surface of cylinder 40, and a groove 72b for forming a gap between the second piston portion 72 and seal valve 73 when part of the outer circumferential surface of the second piston portion 72 is in close contact with part of the inner circumferential surface of seal valve 73.

[0049] The seal valve 73 has, on its outer peripheral surface, seal portions 73a and 73b that come into close contact with the inner peripheral surface of the cylinder 40, and a seal portion 73c that comes into close contact with the inner peripheral surface of the first piston portion 71. The seal valve 73 also has, on its inner peripheral surface, a seal portion 73d that comes into close contact with the outer peripheral surface of the second piston portion 72.

[0050] The diameter of the spring 31 at its end in the directions indicated by arrows 30a and 30b is smaller. Because the diameter of the spring 31 at its end in the direction indicated by arrow 30a is smaller, when the ball 32 moves in the direction indicated by arrow 30b, the end in the direction indicated by arrow 30a comes into contact with the ball 32, thereby restricting the movement of the ball 32 in the direction indicated by arrow 30b. In addition, the diameter of the spring 31 at its end in the direction indicated by arrow 30b is also smaller than the diameter of the end in the direction indicated by arrow 30a. Therefore, when assembling the pump-type product 10, the worker stores the spring 31 in the cylinder 40 without having to be aware of the orientation of the spring 31 in the directions indicated by arrows 30a and 30b, thereby improving workability.

[0051] The cap 35 is formed with a groove 35b into which the cylinder 40 is fitted.

[0052] Spout 36 has operating portion 36a that is pressed by the user to discharge the contents. Spout 36 is formed with hole 36b into which the tip of first piston portion 71 is inserted in the direction indicated by arrow 30b, and discharge port 36c through which the contents are discharged. Spout 36 is attached to first piston portion 71 by inserting the tip of first piston portion 71 in the direction indicated by arrow 30b into hole 36b. Hole 36b and discharge port 36c are in communication.

[0053] Of the components that make up the pump-type product 10, the spring 31 and the ball 32 are made of metal. On the other hand, of the components that make up the pump-type product 10, all the components other than the spring 31 and the ball 32 are made of plastic.

[0054] Next, a method for assembling the pump-type product 10 will be described.

[0055] First, the method of assembling the cylinder 40 will be described.

[0056] Fig. 7(a) is a front view of a portion of the cylinder 40 just before the insertion portion 51 of the upper cylinder portion 50 is inserted into the hole 60a of the lower cylinder portion 60. Fig. 7(b) is a front view of a portion of the cylinder 40 in the state shown in Fig. 7(a) when the lower cylinder portion 60 is substantially omitted except for the lock portion 61.

[0057] First, the upper cylinder portion 50 and the lower cylinder portion 60 are coaxially arranged so that the apex 58a of the mark 58 on the upper cylinder portion 50 faces the apex 67a of the mark 67 on the lower cylinder portion 60, as shown in Figure 7. In the state shown in Figure 7, the L-shaped protrusion 55 of the upper cylinder portion 50 faces the gap between the two L-shaped protrusions 62 of the lower cylinder portion 60.

[0058] Fig. 8(a) is a front view of a portion of the cylinder 40 immediately after the insertion portion 51 of the upper cylinder portion 50 has been inserted into the hole 60a of the lower cylinder portion 60. Fig. 8(b) is a front view of a portion of the cylinder 40 in the state shown in Fig. 8(a) when the lower cylinder portion 60 is substantially omitted except for the lock portion 61.

[0059] The upper cylinder portion 50 and the lower cylinder portion 60 are brought into the state shown in Figure 8 by inserting the insertion portion 51 of the upper cylinder portion 50 into the hole 60a of the lower cylinder portion 60 from the state shown in Figure 7. Here, the L-shaped protrusion 55 of the upper cylinder portion 50 passes through the gap between the two L-shaped protrusions 62 of the lower cylinder portion 60.

[0060] Figure 9(a) is a front view of a portion of the cylinder 40 in a state where the inclined portion 57b of the upper cylinder portion 50 is in contact with the inclined portion 65b of the lower cylinder portion 60. Figure 9(b) is a front view of a portion of the cylinder 40 in the state shown in Figure 9(a) when the lower cylinder portion 60 is substantially omitted except for the lock portion 61.

[0061] 8, the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40b, so that the inclined portion 57b of the upper cylinder portion 50 comes into contact with the inclined portion 65b of the lower cylinder portion 60, as shown in FIG. 9. Here, the first convex portion 56 of the upper cylinder portion 50 passes through the gap between the first convex portion 63 of the lower cylinder portion 60 and the convex portion 65 of the lower cylinder portion 60.

[0062] Fig. 10(a) is a front view of a portion of the cylinder 40 in a state in which relative rotation between the upper cylinder portion 50 and the lower cylinder portion 60 is prevented. Fig. 10(b) is a front view of a portion of the cylinder 40 in the state shown in Fig. 10(a) when the lower cylinder portion 60 is substantially omitted except for the lock portion 61.

[0063] 9, the lower cylinder section 60 is rotated relative to the upper cylinder section 50 in the direction indicated by arrow 40b, whereby the inner diameter of the lower cylinder section 60 gradually increases due to contact between the inclined section 57b of the upper cylinder section 50 and the inclined section 65b of the lower cylinder section 60, and the convex section 65 of the lower cylinder section 60 rides over the second convex section 57 of the upper cylinder section 50, and then the L-shaped convex section 55 of the upper cylinder section 50 is positioned in the gap between the L-shaped convex section 62 of the lower cylinder section 60 and the convex section 65 of the lower cylinder section 60, as shown in FIG. 10. In other words, the cylinder 40 is completed.

[0064] Here, the position of the upper cylinder portion 50 and the lower cylinder portion 60 shown in FIG. 10 is referred to as the locked position. When the upper cylinder portion 50 and the lower cylinder portion 60 of the cylinder 40 are disposed in the locked position shown in FIG. 10, the anti-rotation portion 56b of the upper cylinder portion 50 and the anti-rotation portion 64a of the lower cylinder portion 60 face each other and come into contact with each other, preventing rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b. Also, when the upper cylinder portion 50 and the lower cylinder portion 60 of the cylinder 40 are disposed in the locked position shown in FIG. 10, the anti-rotation portion 57a ​​of the upper cylinder portion 50 and the anti-rotation portion 65a of the lower cylinder portion 60 face each other and come into contact with each other, preventing rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40a. Furthermore, when the upper cylinder section 50 and the lower cylinder section 60 of the cylinder 40 are positioned in the locked position shown in Figure 10, the movement prevention section 56a of the upper cylinder section 50 and the movement prevention section 63a of the lower cylinder section 60 face each other, and the movement prevention section 56a and the movement prevention section 63a are in contact with each other due to the biasing force of the spring 31, thereby preventing movement of the lower cylinder section 60 relative to the upper cylinder section 50 in the direction indicated by the arrow 30a.

[0065] Furthermore, when the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction of rotation indicated by arrow 40b by the operator from the state shown in Figure 8 to the state shown in Figure 10, the operator can improve workability by hooking his or her finger on the knob 66 ​​of the lower cylinder portion 60.

[0066] Next, a method for assembling the piston 70 will be described.

[0067] The piston 70 is assembled by combining the first piston portion 71 and the second piston portion 72 with the seal valve 73 disposed between them.

[0068] Next, a method for assembling the entire pump-type product 10 will be described.

[0069] First, the ball 32, the spring 31, and the piston 70 are inserted in order into the vertical hole 50a of the cylinder 40, and then the bushing 33 is inserted into the vertical hole 50a of the cylinder 40. Also, the packing 34 and the dip tube 37 are attached to the cylinder 40.

[0070] The cylinder 40 is then attached to the cap 35 .

[0071] The spout 36 is then attached to the cylinder 40 to complete the pump 30 .

[0072] Finally, the cap 35 of the pump 30 is attached to the container 20 containing the contents, thereby completing the pump-type product 10.

[0073] In the above description, the packing 34 is attached to the cylinder 40 before the cylinder 40 is attached to the cap 35 , but it may be attached to the cylinder 40 after the cylinder 40 is attached to the cap 35 .

[0074] Similarly, although in the above description dip tube 37 is attached to cylinder 40 before cylinder 40 is attached to cap 35 , it may be attached to cylinder 40 after cylinder 40 is attached to cap 35 .

[0075] Next, the operation of the pump product 10 will be described.

[0076] To expel the contents from the outlet 36c of the spout 36, the user can press the operating portion 36a of the spout 36 to push the spout 36 down in the direction shown by the arrow 30a.

[0077] When the spout 36 of the pump-type product 10 is pushed down in the direction indicated by the arrow 30a, the piston 70 to which the spout 36 is attached is also pushed down in the direction indicated by the arrow 30a.

[0078] When the piston 70 is pushed down in the direction indicated by arrow 30a, the seal valve 73, which is movably supported by the first piston portion 71 and the second piston portion 72, moves in the direction indicated by arrow 30b relative to the first piston portion 71 and the second piston portion 72 due to the pressure of the contents present in the direction indicated by arrow 30a relative to the seal valve 73 itself, and only a part of the seal portion 73d comes into close contact with the outer circumferential surface of the second piston portion 72. As a result, the gap between the seal valve 73 and the second piston portion 72 is such that the part of the gap between the second piston portion 72 and the groove 72b in the direction indicated by arrow 30a communicates with the part of the gap between the second piston portion 72 and the groove 72b in the direction indicated by arrow 30b via the groove 72b. Furthermore, since the sealing portions 73a and 73b of the sealing valve 73 are in close contact with the inner surface of the cylinder 40, and the sealing portion 73c of the sealing valve 73 is in close contact with the inner surface of the first piston portion 71, the contents inside the cylinder 40 do not pass through the gap between the sealing valve 73 and the cylinder 40 and the gap between the sealing valve 73 and the first piston portion 71.

[0079] Furthermore, when piston 70 is pressed down in the direction indicated by arrow 30a, ball 32 is pressed down in the direction indicated by arrow 30a by the pressure of the contents inside cylinder 40. As a result, ball 32 comes into close contact with the inner circumferential surface of cylinder 40. Therefore, the contents inside cylinder 40 do not pass through the gap between ball 32 and cylinder 40.

[0080] As described above, even when piston 70 is pressed down in the direction indicated by arrow 30a, the contents inside cylinder 40 do not pass through the gap between seal valve 73 and cylinder 40, the gap between seal valve 73 and first piston portion 71, or the gap between ball 32 and cylinder 40. Meanwhile, the portion of the interior of cylinder 40 that exists in the direction indicated by arrow 30a relative to piston 70 communicates with discharge port 36c of spout 36 via grooves 72a and 72b of second piston portion 72 and flow path 71b of first piston portion 71. Therefore, when piston 70 is pressed down in the direction indicated by arrow 30a, the contents are discharged from discharge port 36c of spout 36.

[0081] When the user releases the operating portion 36a of the spout 36, the piston 70 of the pump-type product 10 is pushed up in the direction indicated by the arrow 30b by the biasing force of the spring 31.

[0082] When the piston 70 is pushed up in the direction indicated by arrow 30b, the seal valve 73, which is movably supported by the first piston portion 71 and the second piston portion 72, moves in the direction indicated by arrow 30a relative to the first piston portion 71 and the second piston portion 72, and the entire seal portion 73d comes into close contact with the outer circumferential surface of the second piston portion 72. Furthermore, the seal portions 73a and 73b of the seal valve 73 come into close contact with the inner circumferential surface of the cylinder 40, and the seal portion 73c of the seal valve 73 comes into close contact with the inner circumferential surface of the first piston portion 71. Therefore, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40, the gap between the seal valve 73 and the first piston portion 71, or the gap between the seal valve 73 and the second piston portion 72.

[0083] Furthermore, when piston 70 is pushed up in the direction indicated by arrow 30b, the pressure of the contents inside cylinder 40 becomes lower than the pressure of the contents inside dip tube 37, so ball 32 is pushed up in the direction indicated by arrow 30b by the pressure of the contents inside dip tube 37. Therefore, the contents inside dip tube 37 can pass through the gap between ball 32 and cylinder 40.

[0084] As described above, even when the piston 70 is pushed up in the direction indicated by arrow 30b, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40, the gap between the seal valve 73 and the first piston portion 71, or the gap between the seal valve 73 and the second piston portion 72. Meanwhile, the interior of the cylinder 40 communicates with the interior of the dip tube 37 through the gap between the ball 32 and the cylinder 40. Therefore, when the piston 70 is pushed up in the direction indicated by arrow 30b, the contents are filled from the dip tube 37 side into the portion of the interior of the cylinder 40 that is in the direction indicated by arrow 30a relative to the piston 70.

[0085] When the piston 70 is pushed up in the direction indicated by the arrow 30b, the interior of the container 20 communicates with the outside of the pump product 10 via the horizontal hole 50b of the cylinder 40, the gap between the bushing 33 and the first piston portion 71, the gap between the cap 35 and the first piston portion 71, and the gap between the cap 35 and the spout 36, until the seal portion 73b of the seal valve 73 moves in the direction indicated by the arrow 30b from the horizontal hole 50b of the cylinder 40. Therefore, air is introduced into the inside of the container 20 from the outside of the pump product 10.

[0086] Next, a method for disposing of the pump-type product 10 will be described.

[0087] First, the cap 35 of the pump 30 is removed from the container 20 .

[0088] Next, the upper cylinder portion 50 and the lower cylinder portion 60 of the pump 30 are separated from each other. Here, the procedure for separating the upper cylinder portion 50 and the lower cylinder portion 60 is the reverse of the procedure for assembling the cylinder 40.

[0089] That is, the upper cylinder portion 50 and the lower cylinder portion 60 are first rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40a from the state shown in Fig. 10 so that the apex 58a of the mark 58 on the upper cylinder portion 50 faces the apex 67a of the mark 67 on the lower cylinder portion 60, thereby releasing the contact between the movement preventing portions 56a and 63a and making them separable from each other, as shown in Fig. 8. Here, the position of the upper cylinder portion 50 and the lower cylinder portion 60 shown in Fig. 8 is referred to as the unlocked position. Furthermore, since the wall surface forming the anti-rotation portion 65a of the lower cylinder portion 60 is perpendicular to the inner surface of the lower cylinder portion 60, when the upper cylinder portion 50 and the lower cylinder portion 60 are moved from the locked position shown in Figure 10 to the unlocked position shown in Figure 8, the convex portion 65 of the lower cylinder portion 60 will forcibly climb over the second convex portion 57 of the upper cylinder portion 50, resisting contact between the anti-rotation portion 57a ​​of the upper cylinder portion 50 and the anti-rotation portion 65a of the lower cylinder portion 60, and the convex portion 65 of the lower cylinder portion 60 will be crushed and damaged from its original shape and will not return to its original shape.

[0090] Furthermore, when the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction of rotation indicated by arrow 40a by the operator from the state shown in Figure 10 to the state shown in Figure 8, the operator can improve workability by hooking his or her finger on the knob 66 ​​of the lower cylinder portion 60.

[0091] After the upper cylinder part 50 and the lower cylinder part 60 reach the state shown in Fig. 8, the insertion part 51 of the upper cylinder part 50 is removed from the hole 60a of the lower cylinder part 60 from the state shown in Fig. 8, and thus the upper cylinder part 50 and the lower cylinder part 60 reach the separated state shown in Fig. 7. This makes it possible to remove the spring 31 and the ball 32 that were arranged inside the cylinder 40 from inside the cylinder 40.

[0092] After removing the spring 31 and the ball 32 from inside the cylinder 40, the worker disposing of the pump-type product 10 can dispose of the spring 31 and the ball 32 as metal waste, and dispose of the parts of the pump-type product 10 other than the spring 31 and the ball 32 as plastic waste. In other words, the worker disposing of the pump-type product 10 can separate the metal waste from the plastic waste before disposal.

[0093] As described above, in the pump 30, the movement prevention portion 56a of the upper cylinder portion 50 and the movement prevention portion 63a of the lower cylinder portion 60 extend in a direction perpendicular to the extension direction of the cylinder 40 as indicated by the arrows 30a and 30b. When the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction indicated by the arrow 40a, with the central axis 41 extending in the direction indicated by the arrows 30a and 30b as the center of rotation, the contact between the movement prevention portion 56a of the upper cylinder portion 50 and the movement prevention portion 63a of the lower cylinder portion 60 is released, and the upper cylinder portion 50 and the lower cylinder portion 60 can be separated from each other. This reduces the possibility that the upper cylinder portion 50 and the lower cylinder portion 60 will be separated from each other by an external force in the direction indicated by the arrows 30a and 30b, such as the biasing force of the spring 31 inside the cylinder 40, during normal use.

[0094] When the lower cylinder portion 60 of the pump 30 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40b, the convex portion 65 of the lower cylinder portion 60 passes over the second convex portion 57 of the upper cylinder portion 50, and the upper cylinder portion 50 and the lower cylinder portion 60 are then placed in the locked position shown in Figure 10, thereby reducing the possibility that the upper cylinder portion 50 and the lower cylinder portion 60 will become separated from each other during normal use.

[0095] In the pump 30, the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. Therefore, even if the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is increased to reduce the possibility of the upper cylinder portion 50 and the lower cylinder portion 60 separating in the extension direction of the cylinder 40 indicated by arrows 30a and 30b when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position, the convex portion 65 of the lower cylinder portion 60 is more likely to overcome the second convex portion 57 of the upper cylinder portion 50 compared to a configuration in which the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. Therefore, the pump 30 can facilitate the operator's operation of placing the upper cylinder portion 50 and the lower cylinder portion 60 in the locked position shown in FIG. 10 or in the unlocked position shown in FIG.

[0096] In the present embodiment, the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by the arrow 40a is shorter than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by the arrow 40a. However, the pump 30 may be configured such that the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by the arrow 40a is equal to or greater than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by the arrow 40a.

[0097] In the pump 30, the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a. Therefore, even if the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is increased to reduce the possibility of the upper cylinder portion 50 and the lower cylinder portion 60 separating in the extension direction of the cylinder 40 indicated by arrows 30a and 30b when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position, the convex portion 65 of the lower cylinder portion 60 is more likely to overcome the second convex portion 57 of the upper cylinder portion 50 compared to a configuration in which the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a. Therefore, the pump 30 can facilitate the operator's operation of placing the upper cylinder portion 50 and the lower cylinder portion 60 in the locked position shown in FIG. 10 or in the unlocked position shown in FIG.

[0098] In the present embodiment, the length of the protrusion 65 of the lower cylinder part 60 in the rotation direction indicated by the arrow 40a is shorter than the length of the movement prevention part 63a of the lower cylinder part 60 in the rotation direction indicated by the arrow 40a. However, the pump 30 may be configured such that the length of the protrusion 65 of the lower cylinder part 60 in the rotation direction indicated by the arrow 40a is equal to or greater than the length of the movement prevention part 63a of the lower cylinder part 60 in the rotation direction indicated by the arrow 40a.

[0099] When the upper cylinder portion 50 and the lower cylinder portion 60 of the pump 30 are placed in the locked position shown in Fig. 10 and then in the unlocked position shown in Fig. 8, the convex portion 65 of the lower cylinder portion 60 will be damaged, and therefore the worker assembling the cylinder 40 can determine whether the lower cylinder portion 60 has been placed in the locked position and then in the unlocked position based on the state of the convex portion 65 of the lower cylinder portion 60. Therefore, the pump 30 can reduce the possibility that a lower cylinder portion 60 that has been placed in the locked position and then in the unlocked position will be mistakenly reused to assemble the cylinder 40, for example.

[0100] In the present embodiment, when the upper cylinder portion 50 and the lower cylinder portion 60 are disposed in the locked position shown in Fig. 10 and the unlocked position shown in Fig. 8, the convex portion 65 of the lower cylinder portion 60 is damaged. However, the pump 30 may be configured so that the convex portion 65 of the lower cylinder portion 60 is not damaged when the upper cylinder portion 50 and the lower cylinder portion 60 are disposed in the locked position shown in Fig. 10 and the unlocked position shown in Fig. 8. Furthermore, the pump 30 may be configured so that the second convex portion 57 of the upper cylinder portion 50 is damaged when the upper cylinder portion 50 and the lower cylinder portion 60 are disposed in the locked position shown in Fig. 10 and the unlocked position shown in Fig. 8.

[0101] When the upper cylinder portion 50 and the lower cylinder portion 60 are arranged in the locked position shown in Fig. 10 and the unlocked position shown in Fig. 8, if the second convex portion 57 of the upper cylinder portion 50 is damaged, the worker assembling the cylinder 40 can determine whether the upper cylinder portion 50 has been arranged in the locked position and the unlocked position based on the state of the second convex portion 57 of the upper cylinder portion 50. Therefore, the pump 30 can reduce the possibility that, for example, an upper cylinder portion 50 that has been arranged in the locked position and the unlocked position will be mistakenly reused in assembling the cylinder 40.

[0102] In the pump 30, the upper cylinder portion 50 and the lower cylinder portion 60 are provided with marks 58 and 67, respectively, which indicate the unlocked positions. Therefore, the worker performing the work of separating the upper cylinder portion 50 and the lower cylinder portion 60 can easily place the upper cylinder portion 50 and the lower cylinder portion 60 in the unlocked position shown in Figure 8 based on the marks 58 and 67, thereby facilitating the work of separating the upper cylinder portion 50 and the lower cylinder portion 60.

[0103] In the pump 30, the lower cylinder portion 60 is provided with a knob 66 ​​that can be hooked with the fingers of an operator to rotate one of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the direction indicated by arrows 40a and 40b, thereby facilitating the operation of rotating the other of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the direction indicated by arrows 40a and 40b, and as a result, facilitating the operation of separating the upper cylinder portion 50 and the lower cylinder portion 60.

[0104] In this embodiment of the pump 30, the lower cylinder portion 60 is provided with a knob 66 ​​for an operator to place his / her fingers on to rotate one of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the directions indicated by arrows 40a and 40b. However, the pump 30 may be configured without a knob for an operator to place his / her fingers on to rotate the other of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the directions indicated by arrows 40a and 40b. Alternatively, the pump 30 may be configured such that the upper cylinder portion 50 is provided with a knob for an operator to place his / her fingers on to rotate the other of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the directions indicated by arrows 40a and 40b, instead of or in addition to the knob on the lower cylinder portion 60.

[0105] When the upper cylinder portion 50 of the pump 30 is provided with a knob for an operator to hook with his / her fingers to rotate one of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the direction indicated by arrows 40a and 40b, the operation of rotating the other of the upper cylinder portion 50 and the lower cylinder portion 60 relative to the other in the direction indicated by arrows 40a and 40b can be facilitated, and as a result, the operation of separating the upper cylinder portion 50 and the lower cylinder portion 60 can be facilitated.

[0106] In the present embodiment, the pump 30 has the upper cylinder portion 50 inserted into the lower cylinder portion 60. However, the pump 30 may have a configuration in which the lower cylinder portion 60 is inserted into the upper cylinder portion 50. When the pump 30 has a configuration in which the lower cylinder portion 60 is inserted into the upper cylinder portion 50, the lower cylinder portion 60 constitutes the first cylinder portion, and the upper cylinder portion 50 constitutes the second cylinder portion.

[0107] In this embodiment, the pump 30 is of a type that discharges the liquid content, but it may also be of a spray type that sprays the liquid content. [Explanation of symbols]

[0108] 10 Pump-type products 30 Pump 30a Arrow (arrow indicating the direction in which the second cylinder portion moves away from the first cylinder portion in the extending direction of the cylinder) 30b Arrow (arrow indicating the direction in which the first cylinder portion moves away from the second cylinder portion in the extending direction of the cylinder) 31 Spring (metal part) 32 Ball (metal part) 40 cylinders 40a Arrow (arrow indicating the first rotation direction) 40b Arrow (arrow indicating second rotation direction) 41 Central axis (axis) 50 Upper cylinder section (first cylinder section) 56a Movement prevention part (first cylinder movement prevention part) 56b Rotation prevention part (first cylinder second rotation direction rotation prevention part) 57 Second convex part (convex part for getting over) 57a Rotation prevention part (first cylinder first rotation direction rotation prevention part) 58 Landmark 60 Lower cylinder section (second cylinder section) 63a Movement prevention part (second cylinder movement prevention part) 64a Rotation prevention part (second cylinder second rotation direction rotation prevention part) 65 Convex part (convex part for climbing over) 65a Anti-rotation part (second cylinder first rotation direction anti-rotation part) 66 knob 67 Landmark

Claims

1. A pump for a pump-type product, comprising: A cylinder and a metal part disposed inside the cylinder; Equipped with The cylinder is A first cylinder portion; a second cylinder portion attached to the first cylinder portion; and Equipped with The cylinder may be configured such that the first cylinder portion and the second cylinder portion are separated, thereby allowing the component to be removed from inside the cylinder itself; the first cylinder portion includes a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in a direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder, the second cylinder portion includes a second cylinder movement prevention portion that contacts the first cylinder movement prevention portion to prevent movement of the second cylinder portion relative to the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion in the extension direction, The first cylinder movement prevention portion and the second cylinder movement prevention portion extend in a direction perpendicular to the extension direction, the first cylinder portion and the second cylinder portion are rotated relative to one another in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention portion and the second cylinder movement prevention portion and making them separable from each other; the first cylinder portion and the second cylinder portion are capable of rotating in the rotation direction relative to one another while the first cylinder movement preventing portion and the second cylinder movement preventing portion are in contact with each other because the contact between the first cylinder portion and the second cylinder movement preventing portion is released, the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at an end in a second rotation direction opposite to the first rotation direction, the first cylinder portion contacting the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction of the rotation directions, and has a convex portion to be overcome on an outer circumferential surface thereof that can be overcome by a part of the second cylinder portion when one of the first cylinder portion and the second cylinder portion is rotated relative to the other in the rotation direction; the first cylinder portion includes a first cylinder second rotation direction rotation prevention portion that contacts the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction, the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at an end in the first rotation direction that prevents rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and has a jumping convex portion on an inner circumferential surface that jumps over the to-be-jumped convex portion when one of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other, the second cylinder portion includes a second cylinder second rotation direction rotation prevention portion that contacts the first cylinder second rotation direction rotation prevention portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction, the first cylinder portion and the second cylinder portion are arranged in a locking position where, after the climbing convex portion climbs over the climbed-over convex portion by rotating the second cylinder portion in the second rotational direction relative to the first cylinder portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other, the first cylinder portion and the second cylinder portion are disposed in an unlocked position where the climbing convex portion climbs over the to-be-climbed convex portion by rotating the second cylinder portion in the first rotation direction relative to the first cylinder portion from the locked position, a length of the to-be-ridden convex portion in the rotation direction is shorter than a length of the first cylinder movement prevention portion in the rotation direction; The pump, wherein the length of the overcoming convex portion in the rotation direction is shorter than the length of the second cylinder movement prevention portion in the rotation direction.

2. 2. The pump according to claim 1, wherein the component includes a spring that biases the second cylinder portion toward the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion.

3. A pump as described in claim 1 or claim 2, characterized in that the first cylinder second rotation direction rotation prevention portion and the second cylinder second rotation direction rotation prevention portion face each other in the rotation direction when the first cylinder portion and the second cylinder portion are positioned in the locked position.

4. A pump for a pump-type product, A cylinder and a metal part disposed inside the cylinder; Equipped with The cylinder is A first cylinder portion; a second cylinder portion attached to the first cylinder portion; and Equipped with The cylinder may be configured such that the first cylinder portion and the second cylinder portion are separated, thereby allowing the component to be removed from inside the cylinder itself; the first cylinder portion includes a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in a direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder, the second cylinder portion includes a second cylinder movement prevention portion that contacts the first cylinder movement prevention portion to prevent movement of the second cylinder portion relative to the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion in the extension direction, The first cylinder movement prevention portion and the second cylinder movement prevention portion extend in a direction perpendicular to the extension direction, the first cylinder portion and the second cylinder portion are rotated relative to one another in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention portion and the second cylinder movement prevention portion and making them separable from each other; the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at an end in a second rotation direction opposite to the first rotation direction, the first cylinder portion contacting the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction of the rotation directions, and has a convex portion to be overcome on an outer circumferential surface thereof that can be overcome by a part of the second cylinder portion when one of the first cylinder portion and the second cylinder portion is rotated relative to the other in the rotation direction; the first cylinder portion includes a first cylinder second rotation direction rotation prevention portion that contacts the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction, the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at an end in the first rotation direction that prevents rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and has a jumping convex portion on an inner circumferential surface that jumps over the to-be-jumped convex portion when one of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other, the second cylinder portion includes a second cylinder second rotation direction rotation prevention portion that contacts the first cylinder second rotation direction rotation prevention portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction, the first cylinder portion and the second cylinder portion are arranged in a locking position where, after the climbing convex portion climbs over the climbed-over convex portion by rotating the second cylinder portion in the second rotational direction relative to the first cylinder portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other, the first cylinder portion and the second cylinder portion are disposed in an unlocked position where the climbing convex portion climbs over the to-be-climbed convex portion by rotating the second cylinder portion in the first rotation direction relative to the first cylinder portion from the locked position, A pump characterized in that at least one of the convex portion to be overcome and the convex portion for overcoming is a portion that breaks when the first cylinder portion and the second cylinder portion are positioned in the locked position and the unlocked position.

5. The length of the convex portion to be overcome in the rotational direction is shorter than the length of the first cylinder movement prevention portion in the rotational direction; a length of the overcoming convex portion in the rotation direction is shorter than a length of the second cylinder movement prevention portion in the rotation direction; 5. The pump according to claim 4, wherein at least one of the above is satisfied.

6. A pump described in any one of claims 1 to 5, characterized in that the first cylinder portion and the second cylinder portion are provided with a mark indicating the unlocked position.

7. A pump described in any one of claims 1 to 6, characterized in that at least one of the first cylinder portion and the second cylinder portion is provided with a knob for an operator's fingers to hook onto when rotating one of the first cylinder portion and the second cylinder portion relative to the other in the rotational direction.

8. A pump-type product characterized by comprising a pump described in any one of claims 1 to 7.

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