Latch component and swell latch structure

Abstract

Provided are: a latch component in which a drive mechanism operates even in a single article state; and a swell latch structure. A latch member 1 comprises a rod member 3, a cylindrical member 5, a drive mechanism 7, and an expansion / contraction member 9. The rod member 3 has a connection part 11 and an action part 13. The cylindrical member 5 accommodates the rod member 3 in a slidable manner while the connection part 11 and the action part 13 are exposed. The drive member 7 is provided to the rod member 3 and linearly moves the rod member 3 in the longitudinal direction of the cylindrical member 5. The expansion / contraction member 9 is disposed between one end of the cylindrical member and the action part 13, and has a radial dimension which increases when the rod member 3 is driven by the drive mechanism 7 to make the action part 13 approach the one end of the cylindrical member 5, and a pressed state occurs between the action part 13 and the one end of the cylindrical member 5, and which decreases when the action part 13 moves away from the one end of the cylindrical member 5 and the pressed state between the action part 3 and the one end of the cylindrical member 5 is released.

Description

Technical Field

[0001] The present invention relates to a latch component and a swell latch structure that latches a first member and a second member in contact with each other so as not to separate using the latch component.

Background Art

[0002] Japanese Patent No. 2933823 (Patent Document 1) discloses a swell latch structure that latches a first member (82) and a second member (84) in contact with each other so as not to separate using a latch component (swell latch assembly 10). The latch component is fixed to the first member, and the shaft means (14) is axially moved by operating the handle means (12) with the bush means (16) passing through an opening formed in the second member, so that the diameter of the bush means (16) expands and the first member and the second member are fixed to each other.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional swell latch structure, the drive mechanism does not operate unless the latch component is fixed to the first member, so it does not function as a swell latch.

[0005] In addition, in the conventional swell latch structure, the shaft means and the bush means protrude from the first member and are fixed. There is a need to retract the shaft means and the bush means protruding from the first member when the swell latch structure is not used.

[0006] An object of the present invention is to provide a latch component and a swell latch structure in which the drive mechanism operates even in a single-piece state not fixed to a first member.

[0007] Another object of the present invention is to provide a latch component and a swell latch structure that can be in a state of not protruding from the first member.

Means for Solving the Problems

[0008] The latch member of the present invention is composed of a rod member, a cylindrical member, a drive mechanism, and a telescopic member. The rod member has a connecting portion at one end and an acting portion at the other end. The cylindrical member slidably houses the rod member in a state where the connecting portion protrudes from one end and the acting portion is exposed from the other end. The drive member is provided at one end of the rod member and linearly moves the rod member in the longitudinal direction of the cylindrical member when the operating portion is operated. The telescopic member is disposed between the other end of the cylindrical member and the acting portion, and when the rod member is driven by the drive mechanism and the acting portion moves in a direction approaching the other end of the cylindrical member, a pressing state is formed between the acting portion and the other end of the cylindrical member, the radial dimension increases, and when the acting portion moves in a direction away from the other end of the cylindrical member, the pressing state between the acting portion and the other end of the cylindrical member is released, and the radial dimension decreases.

[0009] Because of being configured in this way, the latch member of the present invention can change the radial dimension of the telescopic member by the drive mechanism and function as a latch member not only when fixed to the first member but also when not fixed to the first member. Therefore, not only when the latch member is fixed to the first member in advance, but also when using a single-piece latch member prepared separately from the first member, the first member and the second member can be latched so as not to separate when in contact.

[0010] Although any structure can be adopted to change the radial dimension of the expansion and contraction member, for example, an inclined portion having an inclined surface that inclines in a direction in which the distance from the rod member decreases toward the acting portion is provided at the other end of the cylindrical member, and the expansion and contraction member is disposed between the inclined portion and the acting portion. When the acting portion moves toward the inclined portion, it slides on the inclined surface to increase the radial dimension, and when the acting portion moves away from the inclined portion, it slides on the inclined surface to decrease the radial dimension. By adopting this structure, the radial dimension of the expansion and contraction member can be easily increased by using the force pulling the rod member, and the radial dimension of the expansion and contraction member can be decreased by releasing the pulling force.

[0011] In this case, the drive mechanism can be, for example, a cam - attached lever member provided at one end of the rod member and rotating about an axis extending in a direction orthogonal to the longitudinal direction of the rod member. When using such a cam - attached lever member, the cam engages with one end of the cylindrical member and has a cam surface configured to be able to select whether the rod member moves toward the inclined portion or away from the inclined portion according to the rotation direction of the lever member. In the case of this configuration, by a simple operation of rotating the lever member, the radial dimension of the expansion and contraction member can be increased or decreased.

[0012] The cam surface of the cam preferably has an extended cam surface that extends radially outward of the cylindrical member from the outer peripheral portion of one end in a state of engaging with one end of the cylindrical member. In this way, in a state where the lever member is operated and the radial dimension of the expansion and contraction member is increased, a member can be clamped between the expansion and contraction member and the extended cam surface.

[0013] The length of the inclined portion and the structure of the expansion and contraction member are preferably determined such that when the acting portion moves maximally toward the inclined portion, a part of the expansion and contraction member is located on the other end side of the cylindrical member beyond the inclined portion. In this way, the operation of the lever member can be performed intuitively.

[0014] The expansion and contraction member is composed of a plurality of divided pieces arranged to surround the outer peripheral portion of the rod member protruding from the other end of the cylindrical member and aligned in the circumferential direction of the rod member, and a connecting member that connects the plurality of divided pieces so as to allow radial movement in a state where the plurality of divided pieces are aligned. It is preferable that each of the plurality of divided pieces is provided with a contact surface that contacts the inclined surface. In this way, compared with the conventional latch parts formed of an elastic member such as rubber, the strength and durability of the latch parts can be improved. The plurality of divided pieces can be formed of a material with high strength such as resin, for example. The number of divided pieces may be two or more, but considering the assembly work and operability, about two to five are preferable.

[0015] The connecting member is preferably an elastic member, and for example, an annular elastic rubber can be used. In addition, it is also possible to use an elastic member called a garter spring in which both ends of a coil spring are connected to form an annular shape.

[0016] The cylindrical member is integrally provided with a convex portion extending radially from the outer peripheral surface of the cylindrical member at a position away from the inclined portion toward one end side of the cylindrical member. Between the convex portion and the inclined portion, a plurality of protruding portions protruding radially are integrally provided at intervals in the circumferential direction. The plurality of protruding portions have a radial dimension that does not exceed the convex portion in the radial direction. It is preferable that the expansion and contraction member has a radial dimension that does not exceed the convex portion in the radial direction when the radial dimension is the smallest, and has a radial dimension that exceeds the convex portion in the radial direction when the radial dimension is the largest. Also, it is preferable that the radial dimension of the acting portion is equal to or less than the radial dimension of the convex portion.

[0017] In this way, when fixing the latch member to the first member, it is possible to prevent the latch member from falling out through the through hole formed in the first member. Further, by providing a plurality of protrusions, after latching the first member and the second member and then releasing and separating the first member and the second member, it is possible to prevent the second member from falling between the convex portion and the inclined portion, making it difficult for the latch component to come off the second member. The plurality of protrusions are preferably arranged between the divided pieces of the plurality of divided pieces. That is, in this case, the number of the plurality of protrusions and the number of the plurality of divided pieces are the same.

[0018] The acting portion is arranged to be located between two adjacent divided pieces of the plurality of divided pieces, extends toward the other end of the cylindrical member and has a top at the other end side, and a plurality of protruding portions having a contour shape in which the circumferential dimension becomes smaller as it goes from the acting portion toward the top are formed. A pair of side surfaces facing each other in the circumferential direction of the protruding portion may be in contact with the two divided pieces respectively.

[0019] At the other end of the cylindrical member, two distributed inclined portions that constitute an inclined portion having an inclined surface inclined in a direction in which the distance from the rod member becomes shorter as it goes toward the acting portion are provided at positions facing each other in the radial direction. The expansion and contraction member is arranged to surround the outer peripheral portion of the rod member protruding from the other end of the cylindrical member and includes two divided pieces aligned in the circumferential direction of the rod member, and a connecting member that connects the plurality of divided pieces so as to allow the two divided pieces to move in the radial direction in the aligned state. Contact surfaces that contact the inclined surfaces of the two distributed inclined portions are respectively provided on the two divided pieces. The expansion and contraction member is arranged between the two distributed inclined portions and the acting portion. When the acting portion moves toward the two distributed inclined portions, it slides on the inclined surface to increase the radial dimension, and when the acting portion moves away from the two distributed inclined portions, it slides on the inclined surface to decrease the radial dimension.

[0020] In this case, the acting portion is arranged to be located between the two split pieces, extends toward the other end of the cylindrical member and has a top at the other end side, and two protruding portions having a contour shape in which the circumferential dimension decreases toward the top from the acting portion are formed so as to face each other in the radial direction. A pair of side surfaces facing each other in the circumferential direction of the two protruding portions are in contact with the two split pieces respectively, and it is preferable that the two protruding portions and the two dispersion inclined portions are arranged in a positional relationship separated by 90 degrees in the circumferential direction.

[0021] The cam may further include an additional cam surface that presses a member located radially outside the cylindrical member than the outer peripheral portion of one end of the cylindrical member when the cam surface engages with one end of the cylindrical member and then the lever member is further rotated in the forward direction. By providing such an additional cam surface, wear between the cam surface and one end of the cylindrical member can be reduced.

[0022] The present invention can also be regarded as a swell latch structure that latches the first member and the second member so as not to separate in a state where they are in contact with each other using the latch component described above.

[0023] The first member and the second member each include a contact surface that comes into contact when latched, a non-contact surface located on the opposite side of the contact surface in the longitudinal direction, and a first through hole and a second through hole through which the acting portion penetrates. The diameter dimensions of the first through hole and the second through hole are such that the expansion and contraction member can pass through the first through hole and the second through hole when the radial dimension of the expansion and contraction member is the smallest, but the expansion and contraction member cannot pass through the first through hole and the second through hole when the radial dimension of the expansion and contraction member is the largest.

[0024] The respective thickness dimensions along the longitudinal direction of the first member and the second member, the longitudinal dimension of the rod member of the latch component and the cylindrical member, and the shape of the cam surface are determined such that when the operating portion of the drive mechanism is operated and the radial dimension of the expansion and contraction member is at its maximum, the expansion and contraction member presses the non-contact surface of the second member, and the cam surface of the lever member, which is the operating portion of the drive mechanism, presses the non-contact surface of the first member.

[0025] Thus, in the case of this swell latch structure, with the radial dimension of the expansion and contraction member increased, the first member and the second member are clamped by the expansion and contraction member and the cam surface (including the extended cam surface) of the lever member, and the first member and the second member can be latched so as not to separate in the state where they are in contact with each other (hereinafter, the longitudinal distance between the two members (in this example, the expansion and contraction member and the cam surface of the lever member) in the latched state where they do not separate in the state where the first member and the second member are in contact with each other is defined as the "fastening distance").

[0026] The first member and the second member are the same as the above-described conditions. In particular, in the case of a latch component in which the cam has the above-described cam surface and an additional cam surface, and at least a part of the additional cam surface is located on the forward side of the end position of the cam surface, the respective thickness dimensions along the longitudinal direction of the first member and the second member, the longitudinal dimensions of the rod member and the cylindrical member of the latch component, and the shapes of the cam surface and the additional cam surface are such that when the operating portion of the drive mechanism is operated and the radial dimension of the expansion and contraction member is at its maximum, the expansion and contraction member presses the non-contact surface of the second member, and the cam surface of the lever member engages with one end of the cylindrical member, and when the lever member is rotated maximally in the forward direction, the additional cam surface engages with the non-contact surface of the first member and the cam surface is in a non-engaged state with one end of the cylindrical member, which may be determined accordingly.

[0027] By configuring in this way, when latching the first member and the second member, by operating the lever member, first, the cam surface and one end of the cylindrical member engage, the radial direction of the expansion and contraction member expands, and the expansion and contraction member becomes a diameter dimension that cannot pass through the first through hole and the second through hole (first stage). Then, by further rotating the lever member in the forward direction, the non-contact surface of the additional cam surface and the first member engages, and the first member and the second member are clamped by the expanded expansion and contraction member and the extension cam surface, and the first member and the second member are latched so as not to separate in the state of being in contact (second stage). By latching in two stages in this way, it is possible to eliminate unnecessary friction between the cam surface and one end of the cylindrical member generated when the expansion and contraction member contacts the second member while continuing to expand, and it is possible to improve the durability of the latch parts. In this case, the fastening distance is the longitudinal distance between the expansion and contraction member and the additional cam surface of the lever member.

[0028] In the case of the swell latch structure using the above-described latch parts, as described above, a dedicated design is required to determine the longitudinal dimensions of the rod member and the cylindrical member of the latch parts and the shape of the cam surface in accordance with the thickness dimensions of the first member and the second member. Therefore, the present invention also provides a latch part capable of changing the fastening distance according to the thickness dimensions of the first member and the second member and a swell latch structure using the same (hereinafter, those with a fixed fastening distance are referred to as "dedicated type", and those with a changeable fastening distance are referred to as "flexible type").

[0029] In the case of the flexible type, a movable fixing mechanism including a movable fixing part that is movable in the longitudinal direction on the outer peripheral part of the cylindrical member and is in a fixed attachment state where it does not move in the longitudinal direction at an arbitrary position on the outer peripheral part is mounted. By doing so, it becomes possible to freely change the fastening distance according to the object.

[0030] The movable fixing mechanism may be composed of, for example, a male screw part formed along the longitudinal direction on the outer peripheral surface of the cylindrical member and a movable fixing part (for example, a nut member) having a female screw part screwed into the male screw part.

[0031] Of course, the flexible type latch member may also have some or all of the features of the dedicated type latch member described above (for example, the structure of the expansion and contraction member, the structure of the drive mechanism, etc.).

[0032] The present invention can also be regarded as a swell latch structure that latches the first member and the second member so as not to separate in a state where they are in contact with each other by using a flexible type latch component.

[0033] The first member and the second member are the same as the above-described conditions. The latch component is such that the movable fixing component is located outside the non-contact surface of the first member in the longitudinal direction, and with the expansion and contraction member inserted through the first through hole and the second through hole and the radial dimension being maximized, the movable fixing component is moved along the outer peripheral portion of the cylindrical member toward the non-contact surface of the first member, and when the non-contact surface of the first member is pressed by the movable fixing component, the expansion and contraction member presses the non-contact surface of the second member. By doing so, the expansion and contraction member and the movable fixing component can latch the first member and the second member so as not to separate in a state where they are in contact with each other, and the fastening distance can be changed according to the thickness dimensions of the first member and the second member.

Brief Description of the Drawings

[0034]

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Embodiments for Carrying Out the Invention

[0035] Hereinafter, embodiments of the latch component and the swell latch structure of the present invention will be described in detail with reference to the drawings.

[0036] <First Embodiment> [Configuration of Latch Component] FIG. 1 is a perspective view showing a frame member to which a latch component is fixed. In the present embodiment, the latch component 1 is fixed to a rectangular frame member FE (in FIG. 1, when distinguishing, as shown in the figure, the frame members are labeled FE1 and FE2 as reference numerals). The frame member FE is a hollow frame member made of metal such as aluminum, and two columns member FP1 and FP2 extending upward from the floor surface F are respectively formed with through holes through which the latch component 1 passes. In the present embodiment, the latch component 1 is pre-fixed to the through hole of one column portion FP1 of the frame member FE, and the other column memberIn FP2, through-holes are formed. In the present embodiment, one column member FP1 of the frame member FE1 is the "first member", and the other column member FP2 of the frame member FE2 is the "second member". The latch member 1 latches the one column member FP1 of the frame member FE1 and the other column member FP2 of the frame member FE2 so as not to separate them.

[0037] FIG. 2(A) is a front view of the latch part 1, (B) is a plan view, (C) is a bottom view, (D) is a right side view, (E) is a left side view, and (F) is a cross-sectional view taken along the line F-F shown in (B).

[0038] The latch member 1 of the present embodiment is composed of a rod member 3, a cylindrical member 5, a drive mechanism 7, and a telescopic member 9. These constituent members (3 to 9) are mainly made of resin, but in order to enhance the strength, it is also possible to configure part (for example, the rod member 3) or all of them with metal. This latch part 1 is a dedicated type with a fixed fastening distance.

[0039] The rod member 3 is a rod-shaped member, having a connecting portion 11 at one end and an acting portion 13 at the other end.

[0040] The cylindrical member 5 slidably houses the rod member 3 in a state where the connecting portion 11 of the rod member 3 protrudes from one end and the acting portion 13 is exposed from the other end. At the other end of the cylindrical member 5, an inclined portion having an annular inclined surface 15 that inclines in a direction in which the distance from the rod member 3 shortens as it goes toward the acting portion 13 is provided. Further, on the cylindrical member 5, a convex portion 17 extending radially from the outer peripheral surface of the cylindrical member 5 is integrally provided at a position away from the inclined surface 15 toward one end side of the cylindrical member 5. Furthermore, between the convex portion 17 and the inclined surface 15, three protruding portions 19A to 19C that are provided at intervals in the circumferential direction and protrude in the radial direction are integrally provided.

[0041] The drive mechanism 7 is provided at one end of the rod member 3 and linearly moves the rod member 3 in the longitudinal direction LD of the cylindrical member 5 when the lever member 21 as an operation part is operated. The drive mechanism 7 can be a cam-equipped lever member 21 provided at one end of the rod member 3 and rotating about a shaft AX extending in a direction orthogonal to the longitudinal direction LD of the rod member 3. When such a cam-equipped lever member 21 is used, the cam 23 engages with one end of the cylindrical member 5 and is configured to have a cam surface 25 such that the rod member 3 can be moved in a direction where the acting part 13 moves toward the inclined surface 15 and in a direction where the acting part 13 moves away from the inclined surface 15 according to the rotation direction of the lever member 21. Specifically, as shown in FIG. 2(A), the cam 23 is an eccentric cam having a shape in which the distance D2 is longer than the distance D1 from the shaft AX to the cam surface 25. Further, the cam surface 25 includes an extended cam surface 27 extending radially outward of the cylindrical member 3 from the outer peripheral portion at one end in a state of engaging with one end 5A of the cylindrical member 5.

[0042] The expansion and contraction member 9 is disposed between the other end 5B of the cylindrical member 5 and the acting part 13. When the rod member 3 is driven by the drive mechanism 7 and the acting part 13 moves in a direction approaching the other end 5B of the cylindrical member 5, a pressing state is formed between the acting part 13 and the other end 5B of the cylindrical member 5, and the radial dimension increases. When the acting part 13 moves in a direction away from the other end 5B of the cylindrical member 5, the pressing state between the acting part 13 and the other end 5B of the cylindrical member 5 is released, and the radial dimension decreases. In the present embodiment, the expansion and contraction member 9 is disposed so as to surround the outer peripheral portion of the rod member 3 protruding from the other end 5B of the cylindrical member 5 and includes three split pieces 29A to 29C aligned in the circumferential direction of the rod member 3, and a connecting member 31 that connects the three split pieces 29A to 29C so as to allow the three split pieces 29A to 29C to move in the radial direction RD in a state where they are aligned. In the present embodiment, the connecting member 31 is a garter spring formed by connecting both ends of a coil spring in a ring shape.

[0043] The length of the inclined surface 15 and the structure of the expansion and contraction member 9 are determined such that when the operating portion 13 moves maximally toward the inclined surface 15, a part of the expansion and contraction member 9 is located beyond the inclined surface 15 on the other end side of the cylindrical member 3.

[0044] The latch component 1 of the present embodiment is configured as described above. When the lever member 21 is rotated about the axis AX such that the portion of the cam surface 25 at a distance D2 from the axis AX faces (contacts) the cylindrical member 5, the rod member 3 is driven and the operating portion 13 moves in a direction approaching the other end 5B of the cylindrical member 5. The expansion and contraction member 9 is pushed and slides on the inclined surface 15, increasing the radial dimension. The latch member 1 clamps what is between the expansion and contraction member 9 and the cam surface 25 at this time, and the distance in the longitudinal direction LD between the expansion and contraction member 9 and the cam surface 25 of the lever member at this time is the fastening distance FD.

[0045] Conversely, when the portion of the cam surface 25 at a distance D1 from the axis AX faces the cylindrical member 5, the rod member 3 is driven and the operating portion 13 moves in a direction away from the other end 5B of the cylindrical member 5. The force pushing the expansion and contraction member 9 is released, and it slides on the inclined surface 15, reducing the radial dimension.

[0046] [Attachment to the First Member] Figs. 3(A) and (B) are cross-sectional views showing the state until the latch component 1 is attached to the first member (FP1). The latch component 1 of the present embodiment is used in a state of being attached to the first member (FP1). As shown in Fig. 3(A), a circular first through-hole H1 and a circular opposed through-hole OH are formed in one pillar portion FP1 of the frame member FE1 which is the first member. The diameter dimension of the through-hole H1 is larger than the diameter dimension of the opposed through-hole OH, and is sized such that the convex portion 17 of the cylindrical member 5 can pass through. The diameter dimension of the opposed through-hole OH is sized such that the convex portion 17 of the cylindrical member 5 cannot pass through. When attaching to the first member (FP1), the main body portion of the latch component 1 with the lever member 21 removed is inserted into the first member (FP1) from the through-hole H1 (state of Fig. 3(A)), and further, the connecting portion 11 of the rod member 3 is projected from the opposed through-hole OH. In this state, the lever member 21 is attached to the connecting portion 11 (state of Fig. 3(B)). Thereby, the latch component 1 can move in the longitudinal direction LD by the distance between the convex portion 17 and the cam 23 (particularly the extended cam surface 27) with respect to the first member (FP1), but is fixed in a state where it cannot come off from the first member (FP1). Further, in the present embodiment, when the convex portion 17 is brought into contact with the periphery of the opposed through-hole OH, the expansion / contraction member 9 and the acting portion 13 are designed to be in a state of being housed in the first member (FP1). Thereby, when the frame member FE is arranged along the wall W as in the frame member FE2 shown in Fig. 1, the latch component 1 does not get in the way.

[0047] [Latch between the First Member and the Second Member] Figs. 4 to 6 are diagrams for explaining a swell latch structure that latches the first member (FP1) and the second member (FP2) with the latch component 1 attached so that they do not separate when in contact. Each of (A) in Figs. 4 to 6 is a plan view, and (B) is a front cross-sectional view. The contact surfaces CS1 of the first member (FP1) and CS2 of the second member (FP2) are the surfaces that come into contact when latched, and the non-contact surfaces NS1 and NS2 are located on the opposite sides thereof, respectively (in this embodiment, the non-contact surface NS1 is the surface of the wall portion in which the opposed through-hole OH is formed). As shown in Fig. 4(B), a circular second through-hole H2 is formed in the other column member FP2 of the frame member FE2 which is the second member. The diameter dimension of the second through-hole H2 is such that the expansion and contraction member 9 in a state where the radial dimension is small can pass through, and it has the same diameter dimension as the first through-hole H1.

[0048] The fastening distance FD of the latch component 1 of this embodiment is designed to coincide with the distance between the non-contact surface NS1 of the first member (FP1) and the non-contact surface NS2 of the second member (FP2).

[0049] When latching the first member (FP1) and the second member (FP2), first, align and arrange the first through-hole H1 and the second through-hole H2 (the states in FIGS. 4(A) and (B)), and bring the contact surface CS1 of the first member (FP1) into contact with the contact surface CS2 of the second member (FP1). Then, in this state, the latch part 1 is pushed in until the cam 23 contacts the periphery of the opposed through-hole OH so that the latch part 1 penetrates through the first through-hole H1 and the second through-hole H2 (the states in FIGS. 5(A) and (B)). In this way, the expansion and contraction member 9 of the latch part 1 comes to be located at a position beyond the non-contact surface NS2 of the second member (FP2). Finally, in this state, the lever member 21 is rotated about the axis AX so that the portion of the cam surface 25 whose distance from the axis AX is the distance D2 contacts the cylindrical member 5. Then, the rod member 3 is driven and the working part 13 moves in a direction approaching the other end 5B of the cylindrical member 5, and the expansion and contraction member 9 is pushed and slides on the inclined surface 15 to increase the radial dimension. As a result, the expansion and contraction member 9 presses the non-contact surface NS2 of the second member (FP2), and the cam surface 25 of the lever member 21 presses the non-contact surface NS1 of the first member (FP1), so that the first member (FP1) and the second member (FP2) are prevented from separating (the states in FIGS. 6(A) and (B)).

[0050] Thereafter, when the lever member 21 is rotated about the axis AX so that the portion of the cam surface 25 whose distance from the axis AX is the distance D1 faces the cylindrical member 5, the pressing is released and the first member (FP1) and the second member (FP2) are separated from each other.

[0051] [Function Explanation of Protrusions 19A to 19C] As described above, the latch part 1 of the first embodiment shown in FIGS. 1 to 6 includes three protrusions 19A to 19C on the cylindrical member 5. To explain the functions of the three protrusions 19A to 19C, FIG. 7 is shown as a comparative example.

[0052] Unlike the latch component 1 of the first embodiment, the latch component 1 in Fig. 7 does not have three protruding portions 19A to 19C. However, except for not having the three protruding portions 19, it is the same as the first embodiment. Therefore, for the parts common to the first embodiment, the same reference numerals are used and the description thereof is omitted.

[0053] In this example where there are no three protruding portions 19, when the radial dimension of the expansion and contraction member 9 is small, there is a gap G between the convex portion 17 and the expansion and contraction member 9. Therefore, for example, when releasing the latch between the first member (FP1) and the second member (FP2) and separating the first member (FP1) and the second member (FP2), as shown in Fig. 7, the wall portion in which the second through hole H2 of the second member (FP2) is formed may enter this gap G. As a result, the second member (FP2) may get caught on the expansion and contraction member 9, and a situation may occur where it is difficult to separate the first member (FP1) and the second member (FP2). The three protruding portions 19A to 19C prevent this, and the presence of the protruding portions 19A to 19C can prevent the second member (FP2) from entering the gap G.

[0054] <Second Embodiment> Figs. 8(A) and (B) are diagrams showing the latch component of the second embodiment and the swell latch structure using the latch component, where (A) is a perspective view before latching and (B) is a front view after latching. In this example, except that the latch component does not have a convex portion (reference numeral 17 in the first embodiment), it is the same as the first embodiment. Therefore, for the parts common to the first embodiment, reference numerals obtained by adding 100 to the reference numerals attached to Figs. 1 to 6 are used, and the description thereof is omitted.

[0055] In the second embodiment, the first member is the panel PL, and the second member is the plate-shaped wall surface member WL. A plurality of first through holes H1 are formed in the panel PL, and a corresponding plurality of second through holes H2 are formed in the wall surface member WL. Different from the first embodiment, the latch component 101 is not fixed to the first member (PL) or the second member (WL). Further, the fastening distance FD of the latch component 101 is designed to match the thickness dimensions of the panel PL and the wall surface member WL.

[0056] In this embodiment, with the plurality of first through holes H1 of the panel PL and the plurality of second through holes H2 of the wall surface member WL aligned (the state in Fig. 8(A)), insert the latch component 101 from the side of the panel PL until the cam surface 125 of the latch component 101 contacts the panel PL. In this state, rotate the lever member 121 about the axis AX so that the portion of the cam surface 125 whose distance from the axis AX is D2 contacts the cylindrical member 105. Then, the rod member 103 is driven and the working portion 113 moves in a direction approaching the other end 105B of the cylindrical member 105, and the expansion and contraction member 109 is pushed and slides on the inclined surface 115, increasing the radial dimension. As a result, the expansion and contraction member 109 presses the non-contact surface NS2 of the wall surface member WL (the second member), and the cam surface 125 of the lever member 121 presses the non-contact surface NS1 of the panel PL (the first member), so that the panel PL cannot separate from the wall surface member WL (the state in Fig. 8(B)). In this way, the latch component 101 can be used for the purpose of fixing the panel PL to the wall surface member WL.

[0057] <Third Embodiment> Figs. 9(A) and (B) are diagrams showing the latch component of the third embodiment, (A) is a front view of the latch component, (B) is a plan view, and Fig. 10 is a diagram showing the shape of the opposing through holes OH for fixing the latch component. In Figs. 9(A) and (B), for the parts common to the first embodiment, the reference numerals in Figs. 1 to 6 are appended with the number 200 added, and the description thereof is omitted.

[0058] In this embodiment, as shown in FIG. 10, the opposing through-hole OH has a barrel shape in which opposing sides arranged in parallel are connected by two arcs. The shape of the outer peripheral portion of the cylindrical member 205 of the latch component 201 is circular on the other end side, while having opposing wall portions 233, 233 on one end side, and is shaped to be in alignment with the opposing through-hole OH. As a result, the portion where the circular portion protrudes becomes the convex portion 217, which serves the role of the convex portion 17 of the first embodiment. The latch member 201 is movable in the longitudinal direction LD by the distance between the convex portion 217 and the cam 223 (particularly the extended cam surface 227) with respect to the first member, but is fixed in a state where it cannot come out of the first member (FP1).

[0059] Also, in this embodiment, the number of the split pieces 229A and 229B is two. Accordingly, the protruding portions 219A and 219B located between the two split pieces 229 are also two.

[0060] <Fourth Embodiment> FIG. 11(A) is a front view of the latch component of the fourth embodiment, (B) is a plan view, (C) is a right side view, (D) is a left side view, and (E) is a cross-sectional view taken along line E-E shown in (B). FIGS. 12(A) to (C) are cross-sectional views showing the procedure for latching the first member and the second member with a swell latch structure using the latch component. In FIGS. 11 and 12, for the parts common to the first embodiment, the reference numerals are the numbers obtained by adding 300 to the reference numerals given in FIGS. 1 to 6, and the description thereof is omitted.

[0061] The latch component 301 is of a flexible type with a variable fastening distance. Also, similar to the second embodiment, the latch component 301 is for fastening the first member, which is the panel PL, to the second member, which is the wall surface member WL, and is not fixed to the first member (PL) or the second member (WL).

[0062] On the outer periphery of the cylindrical member 305 of the latch component 301, a movable fixing mechanism 335 is mounted which includes a movable fixing component that can move along the longitudinal direction LD on the outer periphery and can be in a fixed attachment state where it does not move in the longitudinal direction LD at any position on the outer periphery. Specifically, the movable fixing mechanism 335 is a nut member 339 which is a movable fixing component having a male screw portion 337 formed along the longitudinal direction LD on the outer peripheral surface of the cylindrical member 305 and a female screw portion screwed into the male screw portion 337. Since the distance in the longitudinal direction LD between the expansion and contraction member 309 and the nut member 339 of the latch component 301 is the fastening distance FD, the fastening distance can be changed by moving the nut member 339.

[0063] Also, the cam 323 of the lever member 321 of the latch component 301 also has a cam surface 325′ having the same shape as the cam surface 325, and the lever member 321 is rotatable in two directions about the axis AX.

[0064] Before latching the first member (PL) and the second member (WL), the latch component 301 first moves the nut member 339 closer to one end 305B of the cylindrical member 305 in advance. Then, in the same manner as in the second embodiment, with the plurality of first through holes H1 of the panel PL and the plurality of second through holes H2 of the wall member WL aligned, it is inserted from the side of the panel PL (state in Fig. 12(A)), and in this state, the lever member 321 is rotated about the axis AX (state in Fig. 12(B)). In this embodiment, in this state, the first member (PL) and the second member (WL) are not pressed by the latch component 301 and are not latched. Further, in this state, by rotating the nut member 339 until it contacts the panel PL, the expansion and contraction member 309 presses the non-contact surface NS2 of the wall member WL (second member), and the nut member 339 presses the non-contact surface NS1 of the panel PL (first member), and the latch component 301 latches the panel PL and the wall member WL (state in Fig. 12(C)).

[0065] Note that, after the state shown in Fig. 12(C), if the lever member 321 is rotated, the pressing is released and removed, and the nut member 339 is left in its position without being rotated, then when the same panel PL and wall surface member WL are latched again, adjustment of the nut member 339 becomes unnecessary.

[0066] <Fifth Embodiment> FIG. 13 is an exploded perspective view of the latch component of the fifth embodiment, FIG. 14(A) is a front view of the rod member, (B) is a plan view, (C) is a left side view, FIG. 15(A) is a perspective view of the cylindrical member, (B) is a front view, (C) is a plan view, (D) is a left side view, FIG. 16(A) is a side view of the lever member, (B) is a right side view, (C) is a bottom view, (D) is a view showing the region of the cam surface in the cross-sectional view taken along line D-D shown in (B), and (E) is a view showing the region of the extended cam surface in the cross-sectional view taken along the same line D-D. In this embodiment, two split pieces 429 having the same shape and dimensions as those shown in FIGS. 17(A) to (E) are used (hereinafter, when distinguishing between the two split pieces 429, they are distinguished as split pieces 429A and 429B). FIGS. 18 to 20 are diagrams showing the procedure for latching the first member and the second member with the swell latch structure using the latch component of the fifth embodiment. In FIGS. 13 to 20, for the parts common to the first embodiment, the same reference numerals as those in FIGS. 1 to 6 with 400 added are used, and the description thereof is omitted.

[0067] In this embodiment, as shown in FIG. 13, the latch component 401 is composed of a rod member 403, a cylindrical member 405, a drive mechanism 407, and a telescopic member 409. In this example, the connecting member 431 (garter spring) is not shown. This latch component 40 1 is of a dedicated type with a fixed fastening distance.

[0068] As shown in Fig. 14, the rod member 403 is a rod-shaped member having a connecting portion 411 at one end and an acting portion 413 at the other end. The acting portion 413 is provided with two protrusions 412, 412 arranged to be located between two split pieces 429A, 429B constituting the expansion and contraction member 409, and two positioning protrusions 414, 414 for positioning the two split pieces 429A, 429B are formed.

[0069] The two protrusions 412, 412 have tops that extend toward the other end of the connecting portion 411 or the cylindrical member 405 and whose circumferential dimensions become smaller as they go toward the other end side of the connecting portion 411 or the cylindrical member 405. The two protrusions 412, 412 also have a contour shape whose circumferential dimension becomes smaller from the acting portion 413 toward the top, and the two protrusions 412, 412 are formed to face each other in the radial direction. Further, each of the two protrusions 412, 412 has a pair of side surfaces 412A, 412A facing each other in the circumferential direction, and the pair of side surfaces 412A, 412A are in contact with the protrusion contact surfaces 429a (Fig. 17(B)) of the two split pieces 429A and 429B, respectively. The two positioning protrusions 414, 414 are adapted to engage with the positioning recesses 429b (Fig. 17(A)) of the two split pieces 429A and 429B, respectively.

[0070] As shown in FIG. 15, the cylindrical member 405 slidably houses the rod member 403 in a state where the connecting portion 411 of the rod member 403 protrudes from one end and the acting portion 413 is exposed from the other end. At the other end of the cylindrical member 405, two distributed inclined portions 415A and 415B that constitute an inclined portion 415 having an inclined surface 415a that inclines in a direction in which the distance from the rod member 403 decreases as it goes toward the acting portion 413 of the housed rod member 403 are provided at positions facing each other in the radial direction. The two distributed inclined portions 415A and 415B are in contact with the inclined surfaces 429c (FIG. 17(E)) of the two split pieces 429A and 429B. The two distributed inclined portions 415A and 415B and the two protruding portions 412, 412 are arranged in a positional relationship separated by 90 degrees in the circumferential direction. Further, at the other end of the cylindrical member 405, two cylindrical member side protruding portions 416, 416 are formed at positions facing the two protruding portions 412, 412 of the rod member 403 in the longitudinal direction and are arranged so as to be located between the two split pieces 429A and 429B.

[0071] Also, in the present embodiment, similar to the third embodiment, in order to pass through the barrel-shaped opposing through-hole OH shown in FIG. 3, the shape of the outer peripheral portion of the cylindrical member 405 has a disk shape on the other end side, whereas it has opposing planes 433, 433 that oppose each other in parallel in the portion extending from the other end to the one end side.

[0072] As shown in FIGS. 13 and 16, the drive mechanism 407 is provided at the connecting portion 411 of the rod member 403. When the lever member 421 as an operation portion is rotated in the forward direction, the rod member 403 is linearly moved in the longitudinal direction LD of the cylindrical member 405. The drive mechanism 407 can include a shaft member 422 having an axis AX extending in a direction orthogonal to the longitudinal direction LD of the cylindrical member 405 or the rod member 403 through a through hole 410 provided in the connecting portion 411 of the rod member 403, and a cam lever member 421 that rotates about the shaft member 422. In the present embodiment, the cam 423 of the cam lever member 421 engages with one end of the cylindrical member 405, and a pair of cam surfaces 425 are configured such that the movement of the rod member 403 in which the acting portion 413 moves toward the inclined surface 415 and the movement of the acting portion 413 away from the inclined surface 415 can be selected according to the rotation direction of the lever member 421. After the pair of cam surfaces 425 engage with one end of the cylindrical member 403, when the lever member 421 is further rotated in the forward direction, a pair of additional cam surfaces 427 that press a member located radially outside the cylindrical member 403 from the outer peripheral portion of one end of the cylindrical member 403 are provided. Specifically, as shown in FIGS. 16(B), (C), and (D), the cam 423 exists at a position closer to the connecting portion 411 across the connecting portion 411 of the rod member 403, and includes a region (S11) between P11 and P12, a region (S12) between P12 and P13, and a region (S13) between P13 and P14 where the contact state changes depending on the distance from the axis AX, and regions (S21) between P21 and P22, (S22) between P22 and P23, and (S23) between P23 and P24 that exist outside thereof and where the contact state changes depending on the distance from the axis AX. The pair of cam surfaces 425 are the region (S12) between P12 and P13, and the pair of additional cam surfaces 427 are the regions (S22) between P22 and P23 and (S23) between P23 and P24. In FIG. 16(C), the region (S12) between P12 and P13 of the cam surface 425 and the region (S23) between P23 and P24 of the additional cam surface 427 are shown hatched. The contact states of the cam surface 425 and the additional cam surface 427 will be described later. The lever member 421 is rotatably fixed to one end of the rod member 403 by a shaft member 422 having an axis AX.

[0073] As described above, the expansion and contraction member 409 is composed of two split pieces 429 shown in FIGS. 17(A) to (E) and a connecting member (garter spring) 431. The two split pieces 429 are each formed with a protruding portion contact surface 429a, a positioning recess 429b, an inclined surface 429c, and a circumferential recess 429d into which the connecting member 431 fits.

[0074] FIGS. 18 to 20 are diagrams for explaining a swell latch structure that latches the first member (FP1) and the second member (FP2) to which the latch component 401 is attached so as not to separate in a state where they are in contact.

[0075] FIG. 18(A) plan view and (B) front view are diagrams corresponding to the state shown in FIG. 5 of the first embodiment (a diagram in a state where the latch component 401 is pushed in until the lever member 421 contacts the periphery of the opposing through-hole OH). In this state, the expansion and contraction member 409 of the latch component 401 is located at a position beyond the non-contact surface NS2 of the second member (FP2), and the region between P11 and P12 of the lever member 421 faces the end surface of the cylindrical member 405, and the region between P21 and P22 of the lever member 421 faces the first member (FP1).

[0076] FIGS. 19(A) plan view, (B) front view, (C) cross-sectional view taken along line C-C, (D) cross-sectional view taken along line D-D, and (E) partial enlarged view show the state where, from the state of FIGS. 18(A) and (B), the lever member 421 is rotated in the forward direction about the axis AX until the region (S12) between P12 and P13, which is a pair of cam surfaces 425, faces the end surface of the cylindrical member 405. When the pair of cam surfaces 425 (the region between P12 and P13) contact the end surface of the cylindrical member 405, the rod member 403 is driven and the working portion 413 moves in a direction approaching the other end 405B of the cylindrical member 405. The expansion and contraction member 409 is pushed, and while being expanded by the two protruding portions 412, 412, it slides on the inclined surface 415 and the radial dimension increases (the state where the expansion and contraction member 409 is expanded is referred to as the "first stage"). In the present embodiment, the region between P22 and P23, which is a pair of additional cam surfaces 427, also contacts the first member (FP1).

[0077] Furthermore, when the lever member 421 is rotated in the forward direction about the axis AX, in a position where the region between P13 and P14 of the lever member 421 faces the end face of the cylindrical member 405, the region between P13 and P14 is in a non-contact state with the end face of the cylindrical member 405. However, since the region between P22 and P23, which is a pair of additional cam surfaces 427, is in contact with the first member (FP1), the expanded state of the expansion member 409 (i.e., the first stage) is maintained.

[0078] Figures 20(A) Plan view, (B) Front view, (C) Cross-sectional view taken along line C-C, (D) Cross-sectional view taken along line D-D, and (E) Partial enlarged view show a state where the lever member 421 is rotated in the forward direction about the axis AX and the region between P23 and P24 of the lever member 421 faces the first member (FP1). In this state, the region between P13 and P14 of the lever member 421 is in a non-contact state with the end face of the cylindrical member 405. However, since the region between P23 and P24 of the pair of extended cam surfaces 427 is in contact with the first member (FP1), the action portion 413 of the rod member 403 presses the expansion member 9 against the non-contact surface NS2 of the second member (FP2), and the pair of extended cam surfaces 427 of the lever member 421 press the non-contact surface NS1 of the first member (FP1), so that the first member (FP1) and the second member (FP2) do not separate (this state is referred to as the "second stage").

[0079] Thereafter, when the lever member 421 is rotated in the reverse direction about the axis AX so that the portion of the cam surface 425 having a distance D1 from the axis AX faces the cylindrical member 405, the pressing force is released, and the first member (FP1) and the second member (FP2) separate from each other.

[0080] The above-described embodiment is described as an example, and the present invention is not limited to this example as long as the gist thereof is not deviated from. For example, a case where a washer is sandwiched between the lever member of the latch component and the first member so that the lever member and the first member come into contact via the washer member is naturally included.

Industrial Applicability

[0081] According to the present invention, it is possible to provide a latch component and a swell latch structure in which the drive mechanism operates even in a single-piece state without being fixed to the first member. Further, according to the present invention, it is possible to provide a latch component and a swell latch structure that can be in a state of not protruding from the first member.

Explanation of Signs

[0082] 1 Latch component 3 Rod member 5 Cylindrical member 7 Drive mechanism 9 Expansion and contraction member 11 Connecting portion 13 Acting portion 15 Inclined surface 17 Convex portion 19 Protrusion 21 Lever member 23 Cam 25 Cam surface 27 Extended cam surface 29 Split piece 31 Connecting member

Claims

1. A rod member having a connecting portion at one end and an acting portion at the other end, A cylindrical member that slidably houses the rod member with the connecting portion protruding from one end and the acting portion exposed from the other end, A drive mechanism provided at the one end of the rod member that linearly moves the rod member in the longitudinal direction of the cylindrical member when an operation portion is operated, Disposed between the other end of the cylindrical member and the acting portion, when the rod member is driven by the drive mechanism and the acting portion moves in a direction approaching the other end of the cylindrical member, a pressing state is formed between the acting portion and the other end of the cylindrical member, the radial dimension increases, and when the acting portion moves in a direction away from the other end of the cylindrical member, the pressing state between the acting portion and the other end of the cylindrical member is released and the radial dimension decreases, comprising an expansion and contraction member, An inclined portion having an inclined surface is provided at the other end of the cylindrical member, the inclined surface inclining in a direction in which the distance from the rod member decreases as it approaches the acting portion, The expansion and contraction member is disposed between the inclined portion and the acting portion, and has a structure in which when the acting portion moves toward the inclined portion, it slides on the inclined surface to increase the radial dimension, and when the acting portion moves in a direction away from the inclined portion, it slides on the inclined surface to decrease the radial dimension, a latch component.

2. The drive mechanism is a cam-equipped lever member provided at the one end of the rod member and rotating about an axis extending in a direction orthogonal to the longitudinal direction of the rod member, The cam of the cam-equipped lever member engages with the one end of the cylindrical member and has a cam surface configured to be able to select, according to the rotation direction of the lever member, the movement of the rod member in which the acting portion moves toward the inclined portion and the movement of the acting portion in a direction away from the inclined portion. The latch component according to Claim 1.

3. The cam surface of the cam includes an extended cam surface extending radially outside the cylindrical member more than the outer peripheral portion of the one end in a state of engaging with the one end of the cylindrical member. The latch component according to Claim 2.

4. The length of the inclined portion and the structure of the expansion and contraction member are determined such that when the acting portion moves maximally toward the inclined portion, a part of the expansion and contraction member is located on the other end side of the cylindrical member beyond the inclined portion. The latch component according to Claim 1.

5. The expansion and contraction member is composed of a plurality of divided pieces arranged to surround the outer peripheral portion of the rod member protruding from the other end of the cylindrical member and aligned in the circumferential direction of the rod member, and a connecting member that connects the plurality of divided pieces so as to allow movement in the radial direction in a state where the plurality of divided pieces are aligned. The latch component according to claim 4, wherein each of the plurality of divided pieces is provided with a contact surface that contacts the inclined surface.

6. The cylindrical member is integrally provided with a convex portion extending radially from the outer peripheral surface of the cylindrical member at a position away from the one end side of the cylindrical member from the inclined portion. A plurality of protruding portions protruding in the radial direction are integrally provided between the convex portion and the inclined portion with a circumferential interval therebetween. The plurality of protruding portions have a radial dimension that does not exceed the convex portion in the radial direction. The latch component according to claim 5, wherein the expansion and contraction member has a radial dimension that does not exceed the convex portion in the radial direction when the radial dimension is minimum, and the expansion and contraction member has a radial dimension that exceeds the convex portion in the radial direction when the radial dimension is maximum.

7. The latch component according to claim 6, wherein the radial dimension of the acting portion is equal to or less than the radial dimension of the convex portion.

8. The acting portion is arranged to be located between two adjacent ones of the plurality of divided pieces, extends toward the other end of the cylindrical member and has a top portion on the other end side, and a plurality of protruding portions having a contour shape in which the circumferential dimension becomes smaller from the acting portion toward the top portion are formed. The latch component according to claim 5, wherein a pair of side surfaces of the protruding portion facing each other in the circumferential direction are in contact with the two divided pieces, respectively.

9. Two dispersion inclined portions that constitute an inclined portion having an inclined surface that inclines in a direction in which the distance from the rod member becomes shorter toward the acting portion are provided at positions facing each other in the radial direction at the other end of the cylindrical member. The expansion and contraction member is composed of two divided pieces arranged to surround the outer peripheral portion of the rod member protruding from the other end of the cylindrical member and aligned in the circumferential direction of the rod member, and a connecting member that connects the plurality of divided pieces so as to allow movement in the radial direction in a state where the two divided pieces are aligned. Each of the two divided pieces is provided with a contact surface that contacts the inclined surfaces of the two dispersion inclined portions. The expansion and contraction member is disposed between the two dispersion inclined portions and the acting portion. When the acting portion moves toward the two dispersion inclined portions, it slides on the inclined surface to increase the radial dimension. When the acting portion moves away from the two dispersion inclined portions, it slides on the inclined surface to decrease the radial dimension, and has a structure for doing so. The acting portion is disposed so as to be positioned between the two split pieces, extends toward the other end of the cylindrical member, has a top portion on the other end side, and has a contour shape in which the circumferential dimension decreases from the acting portion toward the top portion. Two protruding portions are formed so as to face each other in the radial direction. A pair of side surfaces of the two protruding portions that face each other in the circumferential direction are in contact with the two split pieces respectively. The latch component according to claim 5, wherein the two protruding portions and the two dispersion inclined portions are arranged in a positional relationship separated by 90 degrees in the circumferential direction.

10. The latch component according to claim 2, wherein the cam further includes an additional cam surface that presses a member located radially outside the cylindrical member than the outer peripheral portion of the one end of the cylindrical member when the cam surface engages with the one end of the cylindrical member and then the lever member is further rotated in the forward direction.

11. A rod member having a connecting portion at one end and an acting portion at the other end, A cylindrical member that slidably houses the rod member in a state where the connecting portion protrudes from one end and the acting portion is exposed from the other end, A drive mechanism provided at the one end of the rod member that linearly moves the rod member in the longitudinal direction of the cylindrical member when an operation portion is operated, It is disposed between the other end of the cylindrical member and the acting portion. When the rod member is driven by the drive mechanism and the acting portion moves in a direction approaching the other end of the cylindrical member, a pressing state is formed between the acting portion and the other end of the cylindrical member, and the radial dimension increases. When the acting portion moves away from the other end of the cylindrical member, the pressing state between the acting portion and the other end of the cylindrical member is released, and the radial dimension decreases, and it consists of an expansion and contraction member. The latch component is provided with a movable fixing mechanism having a movable fixing component that can move in the longitudinal direction on the outer peripheral portion of the cylindrical member and is in a fixed attachment state where it does not move in the longitudinal direction at an arbitrary position on the outer peripheral portion.

12. The movable fixing mechanism of the latch component according to claim 11 comprises a male screw portion formed along the longitudinal direction on the outer peripheral surface of the cylindrical member, and a movable fixing component having a female screw portion screwed onto the male screw portion.

13. The movable fixing component of the latch component according to claim 12 is a nut member.

14. A swell latch structure that latches the first member and the second member so as not to separate in a state where they are in contact with each other, using the latch component according to claim 2 or 3, The first member and the second member each include a contact surface that comes into contact when latched, a non-contact surface located on the opposite side of the contact surface in the longitudinal direction, a first through hole and a second through hole through which the acting portion penetrates. The diameter dimensions of the first through hole and the second through hole are such that the expansion and contraction member can pass through the first through hole and the second through hole when the radial dimension of the expansion and contraction member is minimum, but the expansion and contraction member cannot pass through the first through hole and the second through hole when the radial dimension of the expansion and contraction member is maximum. The respective thickness dimensions of the first member and the second member along the longitudinal direction, the longitudinal dimensions of the rod member and the cylindrical member of the latch component, and the shape of the cam surface are determined such that when the operation portion of the drive mechanism is operated and the radial dimension of the expansion and contraction member is maximum, the expansion and contraction member presses the non-contact surface of the second member, and the cam surface of the lever member, which is the operation portion of the drive mechanism, presses the non-contact surface of the first member. A swell latch structure characterized by this.

15. A swell latch structure that latches the first member and the second member so as not to separate in a state where they are in contact with each other, using the latch component according to any one of claims 11 to 13, The first member and the second member each include a contact surface that comes into contact when latched, a non-contact surface located on the opposite side of the contact surface in the longitudinal direction, a first through hole and a second through hole through which the acting portion penetrates. The diameter dimensions of the first through-hole and the second through-hole are such that when the radial dimension of the expansion and contraction member is at its minimum, the expansion and contraction member can pass through the first through-hole and the second through-hole, but when the radial dimension of the expansion and contraction member is at its maximum, the expansion and contraction member cannot pass through the first through-hole and the second through-hole, respectively, The latch component is configured such that when the movable fixing component is located outside the non-contact surface of the first member in the longitudinal direction and the expansion and contraction member is inserted through the first through-hole and the second through-hole to maximize the radial dimension, and the movable fixing component is moved along the outer peripheral portion of the cylindrical member toward the non-contact surface of the first member, and when the non-contact surface of the first member is pressed by the movable fixing component, the expansion and contraction member presses the non-contact surface of the second member. A swell latch structure characterized by this.

16. A swell latch structure that latches the first member and the second member in contact with each other so as not to separate, using the latch component according to claim 10, At least a part of the additional cam surface is located on the forward direction side of the end position of the cam surface, The first member and the second member each include a contact surface that comes into contact when latched, a non-contact surface that is located on the opposite side of the longitudinal direction from the contact surface, and a first through-hole and a second through-hole through which the acting portion penetrates, The diameter dimensions of the first through-hole and the second through-hole are such that when the radial dimension of the expansion and contraction member is at its minimum, the expansion and contraction member can pass through the first through-hole and the second through-hole, but when the radial dimension of the expansion and contraction member is at its maximum, the expansion and contraction member cannot pass through the first through-hole and the second through-hole, respectively, The respective thickness dimensions along the longitudinal direction of the first member and the second member, the longitudinal dimensions of the rod member and the cylindrical member of the latch component, and the shapes of the cam surface and the additional cam surface are such that when the lever member is rotated in the forward direction and the radial dimension of the expansion and contraction member is at its maximum, the expansion and contraction member presses against the non-contact surface of the second member, and the cam surface of the lever member engages with one end of the cylindrical member. When the lever member is rotated maximally in the forward direction, the additional cam surface engages with the non-contact surface of the first member and the cam surface is disengaged from one end of the cylindrical member. A swell latch structure characterized by being defined as such.

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