JP2022102886A - Compression spring and discharge device for container - Google Patents

Abstract

To provide a compression spring for suppressing decrease in elastic force, and to provide a discharge device for a container for suppressing decrease in repulsive force of an operation part.SOLUTION: A compression spring 1 includes at least one unit structure 2, the unit structure 2 has two annular members 6 that are separated each other in an axial direction along a center axis O and form an annular shape with the center axis O as a center each, and plural spring members 5 provided while shifting phases in a circumferential direction for circling the center axis O, the respective spring members 5 are extended linearly between two ends deviating in a circumferential direction between the two annular members 6 so as to connect them within a region positioned between the two annular members 6 along an axial direction, and respective ends of the respective spring members 5 are connected with the annular members 6 at a second angle larger than a first angle when it is assumed that the spring members 5 were extended spirally between ends when viewed in a radial direction along a straight line orthogonal to the center axis O.SELECTED DRAWING: Figure 1

Description

The present invention relates to a compression spring and a discharge device for a container.

Each includes at least one unit structure, the unit structure having two annular members that are axially separated from each other and each having an annular shape, and a plurality of spring members that are provided with a circumferential phase shift. A compression spring is known in which the spring member of the spring member is a structure that extends spirally between the two annular members so as to connect the two annular members in a region located between the two annular members along the axial direction. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 10-73138

In the compression spring as described above, since the load is concentrated on both ends of each spring member at the time of expansion and contraction, both ends are likely to be plastically deformed, which tends to cause a decrease in elastic force.

An object of the present invention is to solve such a problem, and an object thereof is a compression spring in which a decrease in elastic force is unlikely to occur, and a discharge device for a container in which a decrease in repulsive force of an operating portion is unlikely to occur. Is to provide.

The compression spring of the present invention includes at least one unit structure, and the unit structures are separated from each other in the axial direction along the central axis, and each of the two annular members forming an annular shape centered on the central axis and the said. It has a plurality of spring members provided so as to be out of phase in the circumferential direction orbiting the central axis, and each of the spring members is located in a region located between the two annular members along the axial direction. , The end of each of the two spring members extends linearly between the two ends displaced in the circumferential direction so as to connect the two annular members, and the end of each of the spring members is orthogonal to the central axis. The structure is characterized in that the spring member is connected to the annular member at a second angle larger than the first angle when it is assumed that the spring member extends spirally between the ends when viewed in the radial direction along a straight line. ..

In the compression spring of the present invention, in the above configuration, each of the spring members bends and extends from each end toward the other end toward only one side approaching the other end. It is preferable to have two curved portions.

In the above configuration, the compression spring of the present invention has two reverse bending portions in which each of the spring members bends and extends only to the other side from each of the bending portions toward the other end portion. preferable.

In the compression spring of the present invention, in each of the spring members, at least both of the curved portions are opposite to each other when the intermediate portion connecting the two curved portions is compressed in the axial direction of the unit structure. It is preferable not to abut on any of the annular members until they abut on the annular member.

In the above configuration, the compression spring of the present invention has the intermediate portion of each of the spring members, when the intermediate portion is viewed in a developed view, from the root of the outer edge of the one side of the curved portion to the curved portion of the other. Between a straight line drawn so as to be in contact with the outer edge of the other side and a straight line drawn so as to be in contact with the outer edge of the other curved portion of the one curved portion from the root of the outer edge of the one side of the other curved portion. It is preferable to fit in the area of.

In the compression spring of the present invention, in the above configuration, it is preferable that the plurality of spring members do not interfere with each other during the axial compression of the unit structure.

The compression spring of the present invention includes at least one unit pair structure in the above configuration, and the unit pair structure comprises a pair of the unit structures having the same structure except that the winding directions of the plurality of spring members are different. At the same time, it is preferable that the pair of unit structures are adjacent to each other in the axial direction and are integrally connected to each other.

In the above configuration, the compression spring of the present invention includes at least one unit-to-continuous structure, the unit-to-continuous structure comprises a plurality of the unit-to-structures, and the plurality of unit-to-structures are arranged in the axial direction. It is preferable that the structure is integrally connected.

The compression spring of the present invention is preferably made of synthetic resin in the above configuration.

The container discharge device of the present invention is characterized by having the compression spring and an operation unit for discharging the contents of the container by an operation of compressing the compression spring.

In the above configuration, the container discharge device of the present invention has a structure in which the operation portion includes an expansion / contraction structure, and the expansion / contraction structure incorporates the compression spring and expands / contracts in the axial direction by the operation and its release. Is preferable.

According to the present invention, it is possible to provide a compression spring in which a decrease in elastic force is unlikely to occur, and a discharge device for a container in which a decrease in repulsive force of an operating portion is unlikely to occur.

(A) is a side view showing a compression spring according to the first embodiment of the present invention in an uncompressed state, and (b) is a side view showing a compression spring shown in (a) in a compressed state. It is a development view of the compression spring in the state shown in FIG. 1 (a). It is an enlarged view which shows a part of the unit structure shown in FIG. (A) is an enlarged view showing a part of the unit pair structure shown in FIG. 2, (b) is an enlarged view showing a state when compressed from the state shown in (a), and (c) is an enlarged view. , (B) is an enlarged view showing a state when further compressed from the state shown in (b). It is a developed view which shows a part of the unit pair structure of the compression spring which is 2nd Embodiment of this invention in an uncompressed state. (A) is a developed view showing a part of the unit pair structure of the compression spring according to the third embodiment of the present invention in an uncompressed state, and (b) is a development view when compressed from the state shown in (a). It is a development view which shows the state, and (c) is the development view which shows the state when it is further compressed from the state shown in (b). It is sectional drawing of the discharge device for a container which is one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be illustrated and described with reference to the drawings.

The compression spring 1 according to the first embodiment of the present invention shown in FIGS. 1 to 2 is a spring made of synthetic resin including a unit-to-continuous structure 4 composed of three unit-to-structure 3. Each unit pair structure 3 is composed of a pair of unit structures 2 having different winding directions. Each unit structure 2 has three spring members 5 and two annular members 6. In FIGS. 1 to 2, only one unit structure 2 is designated by reference numerals to three spring members 5 and two annular members 6.

In the present specification, the direction along the central axis O is referred to as an axial direction, the direction around the central axis O is referred to as a circumferential direction, and the direction along a straight line orthogonal to the central axis O is referred to as a radial direction.

As shown in FIGS. 1 to 3, each unit structure 2 is separated from each other in the axial direction and is displaced in the circumferential direction from two annular members 6 each forming an annular shape centered on the central axis O. These have a plurality of spring members 5 provided, and each spring member 5 connects the two annular members 6 in a region located between the two annular members 6 along the axial direction. It extends linearly between the two end portions 5a displaced in the circumferential direction, and each end portion 5a of each spring member 5 spirals between the end portions 5a when viewed in the radial direction. It is a structure connected to the annular member 6 at a second angle θ2 larger than the first angle θ1 when it is assumed to extend. The number of spring members 5 included in each unit structure 2 is three in the present embodiment as described above, but may be two or four or more. The detailed structure of each unit structure 2 will be described below.

Each annular member 6 has an annular flat plate shape. The two annular members 6 have the same shape and size. The plurality of spring members 5 have the same shape and size. The plurality of spring members 5 are arranged so as not to interfere with each other when the unit structure 2 is compressed in the axial direction.

As shown in FIG. 3, each spring member 5 extends from each end 5a toward the other end 5a by bending in an arc shape only on one side approaching the other 5a end 2 It has two curved portions 5b. The two curved portions 5b have the same shape and size.

Each spring member 5 has two reverse curved portions 5c extending from each curved portion 5b toward the other end portion 5a by bending in an arc shape only on the other side. The shape and size of the two reversely curved portions 5c are the same as each other.

In each spring member 5, the intermediate portion 5d connecting the two curved portions 5b is composed of two reverse bending portions 5c and a linear reverse bending portion connecting portion 5e connecting them.

In each spring member 5, the intermediate portion 5d is, when viewed in a developed view as shown in FIG. 3, from the root of the outer edge of one curved portion 5b to the outer edge of the other curved portion 5b. In the region between the straight line L drawn tangent to the other curved portion 5b and the straight line L drawn tangent to the other outer edge of the one curved portion 5b from the root of the one side outer edge of the other curved portion 5b. It is configured to fit in a specific area R. Therefore, the intermediate portion 5d does not abut on any of the annular members 6 until at least both of the curved portions 5b abut on the opposite annular member 6 during axial compression of the unit structure 2 (FIG. 4 (FIG. 4). a)-(c)).

In each spring member 5, the intermediate portion 5d is contained in the specific region R without being in contact with the two straight lines L. However, as in the second embodiment of the present invention shown in FIG. 5, in each spring member 5, the intermediate portion 5d may be configured to be in contact with the two straight lines L and to be contained in the specific region R. In the second embodiment, the intermediate portion 5d is in contact with the straight line L at each reverse bending portion 5c. Also in the second embodiment, the intermediate portion 5d does not abut on any of the annular members 6 until at least both of the curved portions 5b abut on the opposite annular member 6 during axial compression of the unit structure 2. ..

As shown in FIGS. 1 and 2, each unit pair structure 3 is composed of a pair of unit structures 2 having the same structure except that the winding directions of the plurality of spring members 5 are different, and the pair of unit structures 2 are formed. It is a structure that is adjacent to each other in the axial direction and is integrally connected. In addition, "the winding direction is different" means that in one unit structure 2, each spring member 5 is wound right in the axial direction, and in the other unit structure 2, each spring member 5 is wound left in the axial direction. Means.

Each unit pair structure 3 is a structure that passes through the center in the axial direction and is plane-symmetrical with respect to a plane perpendicular to the central axis O. However, the unit-to-structure 3 is not limited to a plane-symmetrical structure. That is, in each unit-to-structure 3, the orientation of one unit structure 2 can be changed around the central axis O independently of the orientation of the other unit structure 2.

The unit-to-continuous structure 4 is composed of a plurality of unit-to-structures 3 and is a structure in which a plurality of unit-to-structures 3 are arranged in the axial direction and integrally connected. The number of unit-to-structure 3 included in the unit-to-continuous structure 4 is three in the present embodiment as described above, but may be two or four or more.

As described above, each unit structure 2 is the first in the case where each end portion 5a of each spring member 5 is assumed to extend spirally between the end portions 5a when viewed in the radial direction. It is a structure connected to the annular member 6 at a second angle θ2 larger than one angle θ1. Therefore, according to the present embodiment, it is possible to make it difficult for the load to concentrate on each end portion 5a of each spring member 5 at the time of expansion and contraction, so that the end portion 5a is made difficult to be plastically deformed, thereby increasing the elastic force. It is possible to make the decrease less likely to occur.

Further, as described above, each unit structure 2 has a structure in which each spring member 5 has two curved portions 5b. Therefore, according to the present embodiment, it is possible to further suppress the concentration of the load on each end portion 5a of each spring member 5, and thereby further reduce the decrease in elastic force.

Further, each unit structure 2 has a structure in which each spring member 5 has two reverse bending portions 5c. Therefore, according to the present embodiment, since the two curved portions 5b can be set longer, the concentration of the load on each end portion 5a of each spring member 5 is further suppressed, thereby elastic. It is possible to make it even more difficult for the force to decrease.

Each unit structure 2 is any of the spring members 5 until the intermediate portion 5d abuts at least both curved portions 5b on the opposite annular member 6 during axial compression of the unit structure 2. It has a structure that does not come into contact with the annular member 6. Therefore, according to the present embodiment, it is possible to easily secure the expansion / contraction stroke amount of each unit structure 2.

Each unit structure 2 has a structure in which a plurality of spring members 5 do not interfere with each other when the unit structure 2 is compressed in the axial direction. Therefore, according to the present embodiment, it is possible to easily secure the expansion / contraction stroke amount of each unit structure 2.

As described above, each unit pair structure 3 is composed of a pair of unit structures 2 having the same structure except that the winding directions of the plurality of spring members 5 are different, and the pair of unit structures 2 are adjacent to each other in the axial direction. It is a structure that is connected together. Therefore, in each unit-to-structure 3, when the axial compressive force as shown by the thick arrow in FIG. 1B is applied, the annular member 6 located at the axial center of the unit-to-structure 3 is shown in FIG. 1 (b) is rotated in the circumferential direction as shown by the white arrow, whereby the plurality of spring members 5 can be expanded in the circumferential direction instead of the radial direction. Therefore, according to the present embodiment, it is possible to suppress the radial expansion of the compression spring 1 during compression. It should be noted that each unit pair structure 3 can produce such an effect even if it does not have a structure that passes through the center in the axial direction and is plane-symmetrical with respect to a plane perpendicular to the central axis O.

Further, as described above, the unit-to-continuous structure 4 is composed of a plurality of unit-to-structures 3 and has a structure in which the plurality of unit-to-structures 3 are aligned in the axial direction and integrally connected. Therefore, according to the present embodiment, it is possible to secure a large expansion / contraction stroke amount for a plurality of units vs. the structure 3.

As described above, the compression spring 1 is made of synthetic resin. Therefore, according to the present embodiment, it is possible to improve the recyclability when the compression spring 1 is used in a device made of synthetic resin.

As in the third embodiment of the present invention shown in FIG. 6, in each unit structure 2, each spring member 5 has two reverse bending portions 5c in the intermediate portion 5d connecting the two bending portions 5b. It may be a structure that does not. In the third embodiment, the intermediate portion 5d of each spring member 5 of each unit structure 2 has a linear shape.

As shown in FIG. 7, the compression spring 1 according to the first embodiment, the second embodiment or the third embodiment of the present invention is used in a container discharge device 10 or the like capable of discharging the contents of the container 11. Can be done. The container discharge device 10 according to the embodiment of the present invention shown in FIG. 7 is an operation of compressing the compression spring 1 and the compression spring 1 in the axial direction (direction along the central axis O as described above) (hereinafter, compression). It has an operation unit 12 for discharging the contents of the container 11 by operation).

In the container discharge device 10, all the components including the compression spring 1 are made of synthetic resin. Further, the container discharge device 10 is a general known push-down head type pump device in which the operation unit 12 includes a push-down head 13.

The operation unit 12 includes a telescopic structure 12a. The telescopic structure 12a has a built-in compression spring 1 and is a structure that expands and contracts in the axial direction by a compression operation and its release.

The telescopic structure 12a includes a push-down head 13, a tubular stem 14 centered on a central axis O integrally connected to the push-down head 13, a mounting cap 15, and a stem fixed to the container 11 by the mounting cap 15. It is composed of a retaining member 16. The push-down head 13 is provided radially outside the stem 14, and has a cylindrical peripheral wall 13a centered on the central axis O. The mounting cap 15 has a cylindrical guide wall 15a centered on the central axis O, which is provided radially outside the stem 14 and can guide the peripheral wall 13a in the axial direction.

The compression spring 1 is arranged in the annular space S surrounded by the stem 14, the peripheral wall 13a, and the guide wall 15a. The compression spring 1 is sandwiched and held in the axial direction by the lower surface of the push-down head 13 and the upper surface of the stem retaining member 16.

As described above, the container discharge device 10 has a compression spring 1 that is unlikely to cause a decrease in elastic force. Therefore, according to the present embodiment, it is possible to prevent a decrease in the repulsive force of the operating unit 12 from occurring.

Further, as described above, the telescopic structure 12a has a built-in compression spring 1 that does not easily spread in the radial direction during compression. Therefore, according to the present embodiment, miniaturization can be easily realized.

As described above, in the container discharge device 10, all the components including the compression spring 1 are made of synthetic resin. Therefore, according to the present embodiment, the container discharge device 10 can be disposed of as a recycled product as it is without being separated, so that excellent recyclability can be realized.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist thereof.

Therefore, the compression spring 1 and the container discharge device 10 of the above embodiment can be changed in various ways as described below, for example.

The compression spring 1 of the embodiment includes at least one unit structure 2, and the unit structures 2 are separated from each other in the axial direction along the central axis O, and each of them forms an annular shape centered on the central axis O. It has a member 6 and a plurality of spring members 5 provided so as to be out of phase in the circumferential direction around the central axis O, and each spring member 5 is placed between two annular members 6 along the axial direction. Within the region in which it is located, it extends linearly between the two ends 5a that are circumferentially offset between them so that the two annular members 6 are connected, and each end 5a of each spring member 5 is centered. A structure connected to the annular member 6 at a second angle θ2 larger than the first angle θ1 when the spring member 5 is assumed to extend spirally between the ends 5a when viewed in the radial direction along a straight line orthogonal to the axis O. As long as it is, various changes can be made.

The compression spring 1 has two curved portions in which each spring member 5 is curved and extends only on one side approaching the other end portion 5a from each end portion 5a toward the other end portion 5a. It is preferable to have 5b.

Further, the compression spring 1 preferably has two reverse bending portions 5c in which each spring member 5 bends and extends only to the other side from each bending portion 5b toward the other end portion 5a.

In the compression spring 1, in each spring member 5, at least both curved portions 5b abut on the annular member 6 on the opposite side when the intermediate portion 5d connecting the two curved portions 5b is compressed in the axial direction of the unit structure 2. Until then, it is preferable that the annular member 6 does not come into contact with any of the annular members 6.

In each spring member 5, the compression spring 1 has an intermediate portion 5d from the root of the outer edge of one curved portion 5b to the outer edge of the other curved portion 5b when viewed in a developed view. A region (specification) between a straight line L drawn so as to be in contact with a straight line L drawn so as to be in contact with the outer edge of the other curved portion 5b from the root of the outer edge of the other curved portion 5b. It is preferable to fit in the region R).

In the compression spring 1, it is preferable that the plurality of spring members 5 do not interfere with each other when the unit structure 2 is compressed in the axial direction.

The compression spring 1 includes at least one unit-to-structure 3, and the unit-to-structure 3 is composed of a pair of unit structures 2 having the same structure except that the winding directions of the plurality of spring members 5 are different, and a pair of units. It is preferable that the structures 2 are adjacent to each other in the axial direction and are integrally connected to each other.

The compression spring 1 includes at least one unit-to-continuous structure 4, and the unit-to-continuous structure 4 is composed of a plurality of unit-to-structures 3 and a plurality of unit-to-structures 3 are arranged in an axial direction and integrally connected. It is preferable to have it.

The compression spring 1 is preferably made of synthetic resin.

The container discharge device 10 of the above embodiment can be variously changed as long as it has a compression spring 1 and an operation unit 12 for discharging the contents of the container 11 by an operation of compressing the compression spring 1.

It is preferable that the container discharge device 10 has a structure in which the operation unit 12 includes an expansion / contraction structure 12a, and the expansion / contraction structure 12a incorporates a compression spring 1 and expands / contracts in the axial direction by the operation and its release.

Further, the container discharge device 10 is preferably a push-down head type pump device in which the operation unit 12 includes the push-down head 13.

It is preferable that all the components of the container discharge device 10 including the compression spring 1 are made of synthetic resin.

1 Compression spring 2 Unit structure 3 Unit-to-structure 4 Unit-to-continuous structure 5 Spring member 5a Spring member end 5b Curved part 5c Reverse bending part 5d Intermediate part 5e Reverse bending part connecting part 6 Circular member 10 Discharge device for container 11 Container 12 Operation unit 12a Telescopic structure 13 Push-down head 13a Circumferential wall 14 Stem 15 Mounting cap 15a Guide wall 16 Stem retaining member L Straight line O Center axis R Specific area S Circular space θ1 First angle θ2 Second angle

Claims (11)

Contains at least one unit structure
The unit structure is provided with two annular members each separated from each other in the axial direction along the central axis and each forming an annular shape centered on the central axis, and a plurality of members having a phase shift in the circumferential direction around the central axis. And, in a region where each of the spring members is located between the two annular members along the axial direction, the two annular members are connected to each other. The spring member extends linearly between two circumferentially displaced ends, and the end of each of the spring members is seen radially along a straight line orthogonal to the central axis, and the spring member is at the end. A compression spring having a structure connected to the annular member at a second angle larger than the first angle when it is assumed that the springs extend spirally between the portions. 1. Compression spring. The compression spring according to claim 2, wherein each of the spring members has two reverse bending portions extending from each of the bending portions so as to be curved only on the other side toward the other end portion. In each of the spring members, any of the intermediate portions connecting the two curved portions abuts on the annular member on the opposite side at least during the axial compression of the unit structure. The compression spring according to claim 3, which does not come into contact with the annular member. In each of the spring members, the intermediate portion is pulled from the root of the outer edge of the one side of the curved portion so as to be in contact with the outer edge of the other curved portion of the other curved portion when viewed in a developed view. The fourth aspect of claim 4, wherein the straight line falls within the region between the straight line and the straight line drawn from the root of the outer edge of the other curved portion so as to be in contact with the outer edge of the other curved portion of the one curved portion. Compression spring. The compression spring according to any one of claims 1 to 5, wherein the plurality of spring members do not interfere with each other when the unit structure is compressed in the axial direction. Contains at least one unit pair structure
The unit-to-structure consists of a pair of the unit structures having the same structure except that the winding directions of the plurality of spring members are different, and the pair of unit structures are adjacent to each other in the axial direction and are integrally connected to each other. The compression spring according to any one of claims 1 to 6. Includes at least one unit pair continuous structure
The compression spring according to claim 7, wherein the unit-to-continuous structure is composed of a plurality of the unit-to-structures, and the plurality of unit-to-structures are arranged in the axial direction and integrally connected. The compression spring according to any one of claims 1 to 8, which is made of synthetic resin. The compression spring according to any one of claims 1 to 9,
A container discharge device comprising an operation unit for discharging the contents of the container by an operation of compressing the compression spring. The operation part includes a telescopic structure.
The discharge device for a container according to claim 10, wherein the telescopic structure has a built-in compression spring and a structure that expands and contracts in the axial direction by the operation and the release thereof.

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