Pump-type discharger

Abstract

To provide a pump-type discharger which can be easily recycled and is highly operable.SOLUTION: A pump-type discharger 1 comprises: a cap 10 fitted to a mouth 2a of a container 2; a pump 20 that operates when a stem 25a moves back and forth; a head 30 connected to a stem 25b; an extension 40 provided in one of the head 30 and the pump 20 or one of the head 30 and the cap 10 and extending toward the other of the head 30 and the pump 20 or the other of the head 30 and the cap 10; and elastic pieces 50, 51, and 52 provided in the other of the head 30 and the pump 20 or the other of the head 30 and the cap 10 and pressed by the extension 40 to bend when he head 30 is pressed toward the gap 10. The extension 40 is formed by a material harder than the elastic pieces 50, 51, and 52.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pump-type dispenser. [Background technology]

[0002] A known pump-type dispenser has a cap that is attached to the mouth of a container, a pump that is held at the mouth by the cap and is operated by the back and forth movement of a stem, and a head connected to the stem and provided with a discharge port for discharging the liquid contents, and is configured to discharge the liquid contents inside the container from the discharge port when the head is pressed down towards the cap (see, for example, Patent Document 1).

[0003] This type of pump-type dispenser is equipped with a coil spring inside, and is configured so that when the head is pressed down towards the cap to dispense the liquid contents, and then the pressing operation is released, the head that has been pressed down by the spring force of the coil spring returns to its initial position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-31950 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above conventional pump type dispenser, most of the parts are made of synthetic resin, but the coil spring is made of metal, so that the pump type dispenser after use cannot be recycled as a synthetic resin product. In addition, in this type of pump type dispenser, the parts are firmly fixed to each other by fitting or the like to prevent the parts from coming off during use, so it is time-consuming to disassemble the pump type dispenser and separate the coil spring from the other parts. Therefore, recycling the above conventional pump type dispenser has not been easy.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a pump-type discharger which can be easily recycled and has good operability. [Means for solving the problem]

[0007] The pump-type dispenser of the present invention is a pump-type dispenser comprising: a cap that is attached to the mouth of a container that contains a liquid content; a pump that is held at the mouth by the cap and operates when a stem moves back and forth; and a head that is equipped with a discharge port for discharging the liquid content and is connected to the stem, and is configured to discharge the liquid content inside the container from the discharge port when the head is pressed down toward the cap, characterized in that the pump-type dispenser comprises an extension portion that is provided on either the head or the pump, or either the head or the cap, and extends toward the other of the head and the pump, or the other of the head and the cap, and an elastic piece that is provided on the other of the head and the pump, or the other of the head and the cap, and is pushed by the extension portion and bent when the head is pressed down toward the cap, and the extension portion is formed of a material harder than the elastic piece.

[0008] In the pump type dispenser of the present invention having the above-mentioned configuration, it is preferable that the elastic piece is formed from polypropylene resin, and the extension is formed from ultra-high molecular weight polyethylene resin, polyoxymethylene resin or acrylic resin.

[0009] In the pump type discharger of the present invention having the above-mentioned configuration, it is preferable that the extension portion is formed from an ultra-high molecular weight polyethylene resin having a flexural modulus of 1700 MPa or more and 2700 MPa or less.

[0010] In the pump type discharger of the present invention having the above-mentioned configuration, it is preferable that the extension portion is formed from an ultra-high molecular weight polyethylene resin having a flexural modulus of 2400 MPa or more and 2500 MPa or less.

[0011] In the pump-type dispenser of the present invention, in the above-mentioned configuration, it is preferable that the head is provided with the extension portion, and the cap is provided with an outwardly inclined elastic piece that is bent in a direction away from the stem by the extension portion when the head is pushed down toward the cap, and an inwardly inclined elastic piece that is bent in a direction toward the stem by the extension portion when the head is pushed down toward the cap. Effect of the Invention

[0012] According to the present invention, it is possible to provide a pump type dispenser which can be easily recycled and has good operability. [Brief description of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional side view of a pump-type dispenser according to an embodiment of the present invention; [Diagram 2] 2 is a vertical cross-sectional view of the pump-type discharger shown in FIG. 1 as seen from behind. [Diagram 3] 2 is a cross-sectional view taken along line AA of the pump-type dispenser shown in FIG. 1. [Figure 4] 2 is a vertical cross-sectional side view of the pump-type dispenser shown in FIG. 1 in a state in which the head is pushed down and the outwardly collapsing elastic pieces are bent. FIG. [Diagram 5] 2 is a vertical cross-sectional side view of the pump-type dispenser shown in FIG. 1 in a state where a head is pushed down and an inwardly collapsing elastic piece is bent. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A pump type dispenser 1 according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0015] In this specification and the claims, the up-down direction refers to the up-down direction when the pump-type discharger 1 is in the upright position shown in FIG.

[0016] 1 and 2, a pump type dispenser 1 according to this embodiment is used by being attached to a mouth portion 2a of a bottle-shaped container 2 that contains a content liquid L. The pump type dispenser 1 is attached to the container 2 to constitute a dispensing container 100 together with the container 2.

[0017] The liquid content L discharged by the pump type dispenser 1 is, for example, cosmetics (eg, milky lotion or toner), shampoo, body soap, hand soap, facial cleanser, etc., but is not limited to these.

[0018] The pump-type dispenser 1 includes a cap 10 , a pump 20 and a head 30 .

[0019] The cap 10 is cylindrical with a top, and has a cylindrical peripheral wall 11 coaxial with the axis O of the mouth 2a, and a top wall 12. A female thread 13 is integrally formed on the inner peripheral surface of the peripheral wall 11, and the cap 10 is attached to the mouth 2a by threadingly engaging the female thread 13 with a male thread 2b formed on the outer peripheral surface of the mouth 2a of the container 2. In addition, a circular opening 14 centered on the axis O is formed in the center of the top wall 12.

[0020] The pump 20 includes a cylinder 21, a valve member 22, an internal member 23, a piston 24, a tubular member 25, and a holder 26.

[0021] The cylinder 21 has a flange 21a at its upper end, and the flange 21a is sandwiched between the top wall 12 of the cap 10 and the upper end of the mouth portion 2a via a seal member 27, so that the cylinder 21 is supported by the cap 10 or the mouth portion 2a in a position along the axis O. A suction port 21b is provided at the lower end of the cylinder 21, and a suction pipe 28 extending toward the bottom of the container 2 is connected to the suction port 21b. The upper end opening of the cylinder 21 faces the opening 14.

[0022] The valve member 22 has a holding portion 22a that is held at the lower end of the cylinder 21, and a valve body 22b that is supported by the holding portion 22a so as to be movable up and down. The valve body 22b can function as a check valve that opens and closes the suction port 21b so as to allow the flow of the content liquid L from the suction pipe 28 toward the inside of the cylinder 21 and to prevent the flow of the content liquid L from the inside of the cylinder 21 toward the suction pipe 28.

[0023] The internal member 23 is disposed inside the cylinder 21 and is a member that moves up and down relative to the cylinder 21. The internal member 23 includes a cylindrical connecting tube 23a and a bottom portion 23b that closes the lower end of the connecting tube 23a and extends radially outward. The connecting tube 23a is provided with a communication port 23c that penetrates it, and the top surface of the bottom portion 23b is provided with an annular portion 23d that is located radially outward from the connecting portion with the connecting tube 23a.

[0024] The piston 24 is inserted through the connecting tube 23a and disposed inside the cylinder 21 so as to be located above the bottom 23b. In this embodiment, the piston 24 has an annular base 24a, and an outer sliding piece 24b extending from the base 24a in the vertical direction is integrally provided on the outer edge of the base 24a. The outer sliding piece 24b slidably and liquid-tightly contacts the inner peripheral surface of the cylinder 21. An inner sliding piece 24c extending from the base 24a in the vertical direction is integrally provided on the inner edge of the base 24a. The inner sliding piece 24c slidably and liquid-tightly contacts the inner peripheral surface of the annular portion 23d at its lower portion, and slidably and liquid-tightly contacts the inner peripheral surface of a diameter-enlarged portion 25b of the tubular member 25, which will be described later, at its upper portion.

[0025] The tubular member 25 is a member having a generally tubular shape. The tubular member 25 is integrally provided with a cylindrical stem 25a and an expanded diameter portion 25b that is connected to the lower end of the stem 25a and has a larger diameter than the stem 25a. The stem 25a extends upward from the opening 14 of the cap 10. A connecting tube 23a is fitted inside the stem 25a, so that the internal member 23 and the tubular member 25 move integrally with respect to the cylinder 21.

[0026] The holder 26 has a portion located radially outward of the stem 25a and a portion located radially outward of the enlarged diameter portion 25b, and is provided with a holder base 26a that is inserted into the inside of the cylinder 21. The outer peripheral surface of the holder base 26a is fitted and held by the inner peripheral surface of the cylinder 21, and by fitting and holding the holder base 26a to the inner peripheral surface of the cylinder 21, the internal member 23, the piston 24, and the cylindrical member 25 are prevented from slipping out of the cylinder 21. A flange 26b extending radially outward is provided at the upper end of the holder base 26a, and the holder base 26a is positioned relative to the cylinder 21 by the flange 26b abutting against the upper surface of the flange 21a of the cylinder 21.

[0027] With the above-mentioned configuration, the pump 20 operates by the stem 25a moving back and forth in the vertical direction, and the content liquid L sucked into the inside of the cylinder 21 through the suction port 21b from the suction pipe 28 is pressurized by the piston 24 inside the cylinder 21 and pumped toward the head 30 through the connecting tube 23a and the stem 25a.

[0028] The head 30 includes a cylindrical tubular portion 30a, which is connected to the stem 25a by being fitted and fixed to the stem 25a. A head body 30b is integrally provided on the upper portion of the tubular portion 30a, and a nozzle 30c is integrally provided on the head body 30b, which extends radially outward from the axis O. The nozzle 30c is connected to the stem 25a via the tubular portion 30a, and its tip is an outlet 30d from which the content liquid L is discharged. Therefore, when the pump 20 is operated to pump the content liquid L to the stem 25a, the content liquid L is discharged from the outlet 30d through the tubular portion 30a and the nozzle 30c.

[0029] The head 30 is provided with an extension portion 40 that extends toward the cap 10. In this embodiment, the extension portion 40 is formed in a cylindrical shape centered on the axis O as a separate member from the head main body 30b, and is coaxially disposed outside the cylindrical portion 30a by being fitted and fixed at its upper end portion to a fitting cylinder 30e that is integrally provided at the lower end of the head main body 30b. The extension portion 40 may be provided integrally with the head main body 30b at the lower end of the head main body 30b.

[0030] The lower end of the extension 40 is provided with an outer inclined surface 41 that is inclined so as to narrow radially inward as it extends downward, and an inner inclined surface 42 that is inclined so as to widen radially outward as it extends downward.

[0031] On the other hand, the cap 10 is provided with an elastic piece 50. As shown in Fig. 1 to Fig. 3, in this embodiment, the cap 10 is provided with a pair of outwardly inclined elastic pieces 51 and a pair of inwardly inclined elastic pieces 52, which are alternately arranged at equal intervals in the circumferential direction around the axis O.

[0032] 1, the pair of outwardly-inclined elastic pieces 51 are integrally provided on the top wall 12 of the cap 10 and extend upward from the top wall 12. An abutment surface 51a is provided on the inner circumferential surface at the upper end of the pair of outwardly-inclined elastic pieces 51, the abutment surface 51a being inclined so as to widen radially outward as it extends upward, and the abutment surface 51a abuts against the outer inclined surface 41 of the extension portion 40. In addition, the surfaces of the pair of outwardly-inclined elastic pieces 51 facing radially inward are disposed radially inward of the surfaces of the extension portion 40 facing radially outward.

[0033] The pair of outwardly inclined elastic pieces 51 may each be configured to have an outer reinforcing portion 51b that is integrally connected to the radially outer side of the outwardly inclined elastic piece 51 in a predetermined range on the lower end side.

[0034] 2, the pair of inwardly inclined elastic pieces 52 are integrally provided on the top wall 12 of the cap 10 and extend upward from the top wall 12. The outer circumferential surfaces at the upper ends of the pair of inwardly inclined elastic pieces 52 are provided with abutment surfaces 52a that are inclined so as to narrow radially inward as they extend upward, and the abutment surfaces 52a abut against the inner inclined surfaces 42 of the extension portion 40. The surfaces of the pair of inwardly inclined elastic pieces 52 facing radially outward are disposed radially outward of the surfaces of the extension portion 40 facing radially inward.

[0035] The pair of inwardly inclined elastic pieces 52 may each be configured to have an inner reinforcing portion 52b that is integrally connected to the radially inner side of the inwardly inclined elastic piece 52 in a predetermined range on the lower end side.

[0036] The pair of outwardly inclined elastic pieces 51 are in a state of being slightly elastically deformed radially outward from the natural state in which they extend vertically as shown by the two-dot chain line in Fig. 1, as a result of the abutment surface 51a of the pair of outwardly inclined elastic pieces 51 abutting against the outer inclined surface 41 of the extension portion 40. Similarly, the pair of inwardly inclined elastic pieces 52 are in a state of being slightly elastically deformed radially inward from the natural state in which they extend vertically as shown by the two-dot chain line in Fig. 2, as a result of the abutment surface 52a of the pair of inwardly inclined elastic pieces 52 abutting against the inner inclined surface 42 of the extension portion 40. As a result, an upward elastic force is applied to the head 30 from the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52 via the extension portion 40. Therefore, in the state before the head 30 is pressed down as shown in Figs. 1 and 2, the head 30 is held in a reference position (upper stroke end position) farthest above the cap 10.

[0037] The cap 10 may also be configured to have a cap cover 60 attached. The cap cover 60 is substantially cylindrical, and is fitted and fixed to the outside of the peripheral wall 11 of the cap 10. The cap cover 60 extends upward beyond the upper end of the cap 10, and covers the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52 from the outside. By providing the cap cover 60, it is possible to make the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52 less visible from the outside, thereby improving the appearance of the pump-type dispenser 1.

[0038] In the pump-type dispenser 1 having the above-mentioned configuration, by pressing the head 30 downward toward the cap 10 from the state shown in Figures 1 and 2, as shown in Figures 4 and 5, the pump 20 can be operated to dispense the content liquid L contained in the container 2 to the outside from the discharge port 30d of the head 30.

[0039] When the head 30 is pressed downward toward the cap 10, as shown in Fig. 4, the pair of outwardly inclined elastic pieces 51 are pushed radially outward by the extension portion 40 and bend so as to bend radially outward, i.e., in a direction away from the stem 25a, and the extension portion 40 is pushed upward by the restoring force of the bending, i.e., the elastic force of the bent pair of outwardly inclined elastic pieces 51. Similarly, when the head 30 is pressed downward toward the cap 10, as shown in Fig. 5, the pair of inwardly inclined elastic pieces 52 are pushed radially inward by the extension portion 40 and bend so as to bend radially inward, i.e., in a direction approaching the stem 25a, and the extension portion 40 is pushed upward by the restoring force of the bending, i.e., the elastic force of the bent pair of inwardly inclined elastic pieces 52. Therefore, when the pressing operation is released, the head 30 pressed downward is pushed upward by the elastic forces of the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52, and returns to the original position shown in Figs. 1 and 2.

[0040] In this way, according to the pump type dispenser 1 of this embodiment, without using a metal coil spring, the head 30 after discharging the content liquid L can be returned to its original position by the elastic forces of the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52. Therefore, the pump type dispenser 1 of this embodiment can be easily recycled.

[0041] Furthermore, in this embodiment, the pair of outwardly-inclined elastic pieces 51 are integrally provided with outer reinforcement portions 51b, and the pair of inwardly-inclined elastic pieces 52 are integrally provided with inner reinforcement portions 52b. This allows a greater elastic force to be applied to the extension portion 40 from the pair of outwardly-inclined elastic pieces 51 and the pair of inwardly-inclined elastic pieces 52, thereby more reliably returning the head 30 to its original position.

[0042] Here, in the pump type discharger 1 of this embodiment, in the above-mentioned configuration, the extension portion 40 is made of a material harder than the elastic pieces 50 , that is, the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52 .

[0043] If the extension portion 40 were formed from a material having the same hardness as or a softer material than the elastic piece 50, i.e., the pair of outwardly leaning elastic pieces 51 and the pair of inwardly leaning elastic pieces 52, when the head 30 is pressed downward toward the cap 10, the extension portion 40 abutting the elastic piece 50, i.e., the pair of outwardly leaning elastic pieces 51 and the pair of inwardly leaning elastic pieces 52, may be significantly deformed, thereby deteriorating the operability of the pump-type dispenser 1.

[0044] In contrast, in the pump type dispenser 1 of this embodiment, the extension portion 40 is made of a harder material than the elastic piece 50, i.e., the pair of outwardly leaning elastic pieces 51 and the pair of inwardly leaning elastic pieces 52, so that it is possible to suppress deformation of the extension portion 40 when the head 30 is pressed downward toward the cap 10 and the extension portion 40 presses and bends the elastic piece 50, i.e., the pair of outwardly leaning elastic pieces 51 and the pair of inwardly leaning elastic pieces 52. This makes it possible to more efficiently bend the elastic piece 50, i.e., the pair of outwardly leaning elastic pieces 51 and the pair of inwardly leaning elastic pieces 52, by the extension portion 40 made of a harder material, thereby improving the operability of the pump type dispenser 1.

[0045] Furthermore, by forming the extension portion 40 from a harder material, the ease of assembling the extension portion 40 to the fitting tube 30e provided on the head 30 can be improved.

[0046] In this embodiment, the elastic pieces 50, i.e., the pair of outwardly inclined elastic pieces 51 and the pair of inwardly inclined elastic pieces 52, are each formed of polypropylene resin (PP) together with the cap 10. Meanwhile, the extension portion 40 is formed of ultra-high molecular weight polyethylene resin (UHMW-PE), whereas the head 30 is formed of polypropylene resin. When the extension portion 40 is configured to be integrally formed with the head 30, the head 30 and the extension portion 40 may be configured to be integrally formed as a whole from ultra-high molecular weight polyethylene resin.

[0047] The ultra-high molecular weight polyethylene resin has a higher flexural modulus and a higher sliding property than the polypropylene resin, and therefore can improve the operability of the pump-type discharger 1.

[0048] The ultra-high molecular weight polyethylene resin from which the extension 40 is made is preferably one having a flexural modulus of 1700 MPa or more and 2700 MPa or less.

[0049] If an ultra-high molecular weight polyethylene resin having a flexural modulus of less than 1700 MPa is used to form the extension portion 40, the extension portion 40 may be easily deformed, and the operability of the pump-type dispenser 1 may not be sufficiently improved. On the other hand, if an ultra-high molecular weight polyethylene resin having a flexural modulus of more than 2700 MPa is used to form the extension portion 40, the fitting force required to fit the extension portion 40 into the fitting tube 30e provided on the head 30 may be large, and the assembly of the extension portion 40 to the head 30 may be deteriorated, and the impact resistance of the extension portion 40 may be reduced. In contrast, by using an ultra-high molecular weight polyethylene resin having a flexural modulus of 1700 MPa or more and 2700 MPa or less to form the extension portion 40, the operability of the pump-type dispenser 1 may be sufficiently improved, the assembly of the extension portion 40 to the head 30 may be improved, and the impact resistance of the extension portion 40 may be further improved.

[0050] It is more preferable to use an ultra-high molecular weight polyethylene resin that forms the extension 40, the resin having a flexural modulus of elasticity of 2400 MPa or more and 2500 MPa or less.

[0051] By using an ultra-high molecular weight polyethylene resin having a flexural modulus of 2400 MPa or more and 2500 MPa or less as the ultra-high molecular weight polyethylene resin forming the extension portion 40, the operability of the pump-type dispenser 1 can be further improved while also improving the ease of assembly of the extension portion 40 to the head 30.

[0052] The ultra-high molecular weight polyethylene resin from which the extension portion 40 is formed may be, for example, LUBMER (registered trademark) manufactured by Mitsui Chemicals, Inc., but is not limited thereto.

[0053] The material for forming the extension portion 40 is not limited to the above, and any material harder than the material for forming the elastic piece 50 may be used. For example, other synthetic resins having a high flexural modulus and high sliding properties, such as polyoxymethylene resin (POM) and acrylic resin (PMMA), may be used.

[0054] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0055] For example, in the above embodiment, the extension portion 40 is provided on the head 30, and the elastic piece 50 is provided on the cap 10, but this is not limiting, and the elastic piece 50 may be provided on the head 30 and the extension portion 40 may be provided on the cap 10, or the extension portion 40 may be provided on the head 30 and the elastic piece 50 may be provided on the pump 20, or the elastic piece 50 may be provided on the head 30 and the extension portion 40 may be provided on the pump 20. When the elastic piece 50 or the extension portion 40 is provided on the pump 20, the elastic piece 50 or the extension portion 40 may be provided integrally with the flange 26b of the holder 26, extending upward from the flange 26b.

[0056] In the above embodiment, a pair of outwardly-inclined elastic pieces 51 and a pair of inwardly-inclined elastic pieces 52 are arranged at equal intervals in the circumferential direction as the elastic pieces 50, but only the outwardly-inclined elastic pieces 51 or only the inwardly-inclined elastic pieces 52 may be provided as the elastic pieces 50. The number and arrangement of the elastic pieces 50, i.e., the outwardly-inclined elastic pieces 51 and the inwardly-inclined elastic pieces 52, can also be changed in various ways.

[0057] Furthermore, the configuration of pump 20 described above is merely an example, and other types of pumps may be used. [Explanation of symbols]

[0058] 1. Pump type dispenser 2 containers 2a Mouth 2b Male thread 10 Cap 11 Surrounding wall 12 Top wall 13 Female thread 14 Aperture 20 Pump 21 Cylinder 21a Flange 21b Suction port 22 Valve member 22a Holding part 22b Valve body 23 Internal parts 23a Connecting tube 23b bottom 23c communication port 23d Circular section 24 Piston 24a base 24b Outer sliding piece 24c Inner sliding piece 25 Cylindrical member 25a stem 25b Expanded diameter part 26 Holder 26a Holder base 26b flange 27 Sealing material 28 Suction pipe 30 Head 30a Cylindrical part 30b Head body 30c Nozzle 30d outlet 30e fitting tube 40 Extension 41 Outer slope 42 Inner inclined surface 50 Elastic piece 51 Outer falling elastic piece 51a Contact surface 51b Reinforcement part 52 Inwardly collapsing elastic piece 52a Contact surface 52b Inner reinforcement 60 Cap Cover 100 Discharge container L Content liquid O axis

Claims

1. A cap to be attached to the mouth of a container that contains the liquid content; a pump that is held in the mouth portion by the cap and that is actuated by the back and forth movement of a stem; a head having a discharge port for discharging the content liquid and connected to the stem; A pump-type dispenser configured to dispense a content liquid inside the container from the discharge port when the head is pressed down toward the cap, an extension portion provided on either the head or the pump or the head or the cap, and extending toward the other of the head or the pump or the other of the head or the cap; an elastic piece provided on the other of the head and the pump, or the other of the head and the cap, and pushed by the extension portion and bent when the head is pressed down toward the cap, A pump-type dispenser, wherein the extension is formed of a material harder than the elastic piece.

2. The elastic piece is made of polypropylene resin, 2. The pump-type dispenser according to claim 1, wherein the extension is made of ultra-high molecular weight polyethylene resin, polyoxymethylene resin or acrylic resin.

3. 3. The pump type dispenser according to claim 2, wherein the extension is made of ultra-high molecular weight polyethylene resin having a flexural modulus of 1700 MPa or more and 2700 MPa or less.

4. 4. The pump type dispenser according to claim 3, wherein the extension is made of ultra-high molecular weight polyethylene resin having a flexural modulus of 2400 MPa or more and 2500 MPa or less.

5. The head is provided with the extension portion, A pump-type dispenser as described in any one of claims 1 to 4, wherein the cap is provided with an outwardly inclined elastic piece that is bent by the extension portion in a direction away from the stem when the head is pushed down toward the cap, and an inwardly inclined elastic piece that is bent by the extension portion in a direction toward the stem when the head is pushed down toward the cap.

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