Grommet assembly and control cable assembly
The grommet assembly with a fitting portion and guide portions addresses the challenges of difficult mounting and detachment in existing grommet and retainer assemblies, providing a secure and easy-to-assemble solution for control cable applications.
Patent Information
- Application Number
- JP2023166374
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-27
- Publication Date
- 2025-04-09
- Estimated Expiration
- 2043-09-27
AI Technical Summary
Existing grommet and retainer assemblies for control cables are difficult to mount and prone to detachment, especially when the number of protrusions or engagement force is increased to improve holding force, leading to poor mountingability.
A grommet assembly with a grommet and retainer design that includes an insertion portion with a fitting portion and guide portions, allowing for easy attachment and secure fitting between the grommet and retainer, preventing accidental detachment.
The proposed grommet assembly is easy to mount and resistant to detachment, ensuring a secure and reliable connection between the grommet and retainer, thus improving the overall assembly process and durability.
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Figure 2025056867000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a grommet assembly and a control cable assembly. [Background technology]
[0002] A control cable has one end connected to an operating part such as a shift lever provided inside the vehicle and the other end connected to an operating object such as a transmission outside the vehicle, and is routed through a through hole provided in the vehicle body.
[0003] Grommets are provided in the through holes of the vehicle body to prevent foreign matter such as water, exhaust gas, or dust from entering the vehicle interior from the outside of the vehicle (see, for example, Patent Document 1).
[0004] Patent Document 1 discloses a grommet assembly in which a grommet is integrated with a retainer. The grommet and the retainer are integrated by inserting a protrusion of the grommet into a small hole of the retainer. [Prior art documents] [Patent documents]
[0005] [Patent Document 1] International Publication No. 2013-118774 [Patent Document 2] Japanese Utility Model Application Publication No. 5-79127 Summary of the Invention [Problem to be solved by the invention]
[0006] However, when the grommet and the retainer are integrated by the protrusion, the grommet may come off the retainer if the outer casing is accidentally pushed in the axial direction when attaching the control cable to the vehicle body, which requires the grommet to be reattached to the retainer, making the work less efficient.
[0007] On the other hand, if the number of protrusions is increased or the engagement force of the protrusions is increased in order to make it difficult for the grommet to come off the retainer, the attachment of the grommet to the retainer becomes poor (for example, see Patent Document 2). In the configuration shown in Patent Document 2, the grommet is attached to the column cover while being bent, so making the protrusions larger in order to improve the retention force results in poor attachment.
[0008] An object of the present invention is to provide a grommet assembly and a control cable assembly in which the grommet and the retainer are easily attached and are less likely to come off. [Means for solving the problem]
[0009] A grommet assembly according to a first aspect of the present invention includes a grommet and a retainer. The grommet has an insertion portion and a grommet side mounting portion. The insertion portion includes an insertion hole through which a cable is inserted and a fitting portion into which the retainer is fitted. The retainer is attached to the grommet side mounting portion. The retainer has a fitted portion and a retainer side mounting portion. The fitting portion fits into the fitted portion. The retainer side mounting portion is attached to the grommet side mounting portion. The fitting portion fits into the fitted portion in a restriction direction including an axial direction along the axis of the insertion hole. The insertion portion further includes a guide portion that guides the fitted portion to a predetermined position where it is fitted into the fitting portion. The guide portion is provided at a different position in the circumferential direction of the insertion portion relative to the fitting portion. Effect of the Invention
[0010] According to the present invention, it is possible to provide a grommet assembly and a control cable assembly in which the grommet and the retainer are easily attached and are less likely to come off. [Brief description of the drawings]
[0011] [Figure 1] FIG. 2 is a side view showing the control cable assembly 1. [Figure 2A] FIG. 2 is a perspective view of the grommet assembly as viewed from the front side. [Figure 2B]FIG. 2 is a perspective view of the grommet assembly as viewed from the back side. [Figure 2C] FIG. 2 is a plan view of the grommet assembly. [Figure 2D] FIG. 2D is a cross-sectional view taken along line AA in FIG. 2C. [Figure 3A] FIG. 2 is a perspective view of the grommet as viewed from the front surface side. [Figure 3B] FIG. [Figure 3C] FIG. 3C is a side view of the grommet as viewed along the arrow B in FIG. 3B. [Figure 4A] FIG. 2 is a perspective view of the retainer as viewed from the front surface side. [Figure 4B] FIG. 4 is a perspective view of the retainer as viewed from the rear surface side. [Figure 4C] FIG. [Figure 5A] FIG. 13 is a perspective view for explaining assembly of a retainer to a grommet. [Figure 5B] FIG. 13 is a perspective view for explaining assembly of a retainer to a grommet. [Figure 5C] FIG. 13 is a perspective view for explaining assembly of a retainer to a grommet. [Figure 5D] FIG. 4 is a side view showing a state in which the retainer is attached to the grommet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A control cable assembly and a grommet assembly according to an embodiment of the present invention will now be described.
[0013] (Overview of control cable assembly 1) 1 is a side view showing a control cable assembly 1. The control cable assembly 1 includes a control cable 2 and a grommet assembly 3.
[0014] The control cable 2 connects, for example, a shift lever disposed inside the vehicle and a transmission disposed outside the vehicle. The control cable 2 has, for example, a cylindrical outer casing 2a and an inner cable 2b passing through the inside of the outer casing 2a. The control cable 2 transmits the operation of the shift lever to the transmission. The control cable 2 is led from inside the vehicle to outside the vehicle through an opening 4a formed in the panel 4. The surface facing the inside of the vehicle is indicated by 4b. The grommet assembly 3 is arranged so as to close the opening 4a of the panel 4. The control cable 2 is inserted through an insertion hole 31 (see FIG. 2D) provided in the grommet assembly 3. The control cable 2 is led from inside the vehicle to outside the vehicle through the insertion hole 31 of the grommet assembly 3. The grommet assembly 3 is fixed to the panel 4 by a bolt or the like.
[0015] (Grommet assembly 3) Fig. 2A is a perspective view of the grommet assembly 3 as viewed from the front side. Fig. 2B is a perspective view of the grommet assembly 3 as viewed from the rear side. Fig. 2C is a plan view of the grommet assembly 3. Fig. 2D is a cross-sectional view between AA in Fig. 2C.
[0016] 2A to 2D, grommet assembly 3 has grommet 11 and retainer 12. Grommet 11 is formed of an elastic material such as rubber. Retainer 12 is made of metal, but the material is not particularly limited as long as it can hold grommet 11.
[0017] (Grommet 11) FIG. 3A is a perspective view of grommet 11 as viewed from the front side. FIG. 3B is a plan view of grommet 11. FIG. 3C is a side view of grommet 11 as viewed along the direction of arrow B in FIG. 3B. As shown in FIGS. 3A to 3C, grommet 11 has insertion portion 21, grommet side mounting portion 22, and a pair of anti-rotation protrusions 23. Retainer 12 is attached to grommet side mounting portion 22. As shown in FIGS. 2B and 3C, grommet side mounting portion 22 has flat portion 25 and rib 26. Flat portion 25 is flat. Rib 26 is disposed on the surface of flat portion 25 on the back side direction D (described later). Rib 26 is formed so as to surround insertion hole forming portion 33 described later. In this embodiment, flat portion 25 has a flat surface extending in a direction perpendicular to a central axis described later.
[0018] As shown in FIG. 3B, the insertion portion 21 is disposed substantially in the center of the grommet side mounting portion 22. When the grommet 11 and the retainer 12 are combined, the insertion portion 21 is inserted into the insertion hole 51 of the retainer 12. As shown in the plan view of FIG. 3B, the insertion portion 21 has an outer shape formed along a circle. The center of this circle is the central axis O. The grommet side mounting portion 22 is formed point symmetrically with respect to the central axis O. A pair of bolt holes 22a are formed in the grommet side mounting portion 22. Each bolt hole 22a is a through hole formed in the grommet side mounting portion 22. The pair of bolt holes 22a are formed point symmetrically with respect to the central axis O.
[0019] 3A and 3B, the insertion section 21 has an insertion hole 31, an insertion section main body 32, an insertion hole forming section 33, a pair of fitting sections 34, and a pair of guide sections 35. The control cable 2 is inserted through the insertion hole 31.
[0020] As shown in FIG. 3A, the insertion body 32 protrudes in the front direction from the flat surface portion 25 of the grommet-side mounting portion 22. The insertion body 32 is cylindrical. For the sake of explanation, the direction perpendicular to the grommet-side mounting portion 22 and in which the insertion body 32 protrudes is referred to as the front direction C. However, depending on the arrangement, the front direction of the grommet assembly 3 is not limited to the front. The opposite direction to the front direction C is referred to as the back direction D. The insertion body 32 is formed point-symmetrically with respect to the central axis O in a plan view. The central axis O is parallel to the front direction C. In the plan view of FIG. 3B, a counterclockwise direction L and a clockwise direction R, which is the opposite direction to the counterclockwise direction L, are shown with the central axis O as the center.
[0021] The insertion hole forming portion 33 forms the insertion hole 31. The insertion hole forming portion 33 is hollow and tubular. The insertion hole forming portion 33 penetrates the insertion portion main body 32 from the front side to the back side. If the axis of the insertion hole forming portion 33 is M, as shown in FIG. 3C, the axis M of the insertion hole forming portion 33 is inclined with respect to the front side direction C. As shown in FIG. 3B, the insertion hole forming portion 33 is positioned off the central axis O of the insertion portion 21 and toward the right side in the figure.
[0022] The pair of fitting parts 34 fits the retainer 12. As shown in FIG. 3C, the pair of fitting parts 34 is formed by a pair of protrusions 36 arranged on the insertion body 32 and a side surface 32a of the insertion body 32 on the back side direction D side of the protrusions 36. A space 37 is formed between each of the protrusions 36 and the grommet side mounting part 22. As shown in FIG. 3B, the pair of protrusions 36 protrude from the insertion body 32. The pair of protrusions 36 are formed point symmetrically with respect to the central axis O. As shown in FIG. 3C, each of the protrusions 36 protrudes from the insertion body 32 toward the outside in the radial direction of the central axis O. As shown in FIG. 3C, each of the protrusions 36 is arranged toward the front side direction C of the insertion body 32.
[0023] One of the fitting portions 34 is formed by one of the protrusions 36 and the side surface 32a, and the other fitting portion 34 is formed by the other of the protrusions 36 and the side surface 32a. Each fitted portion 53 of the retainer 12, which will be described later, fits into the space 37 on the back side direction D side of each of the protrusions 36, so that the fitted portion 53 is fitted by the fitting portion 34 in the front side direction C. Each of the fitting portions 34 has a locking portion 38. The locking portion 38 corresponds to a portion of the surface 36t of the fitting portion 34 on the back side direction D side of the protrusion 36. The locking portion 38 locks the fitted portion 53 in the front side direction C. As a result, when an external force acts on the grommet 11 in the back side direction D, the movement of the grommet 11 in the back side direction D is restricted, and the grommet 11 can be prevented from coming off the retainer 12 in the back side direction D side.
[0024] The pair of guide portions 35 guide the fitted portion 53 of the retainer 12 to a predetermined position where it is fitted into the fitting portion 34 when the retainer 12 is attached to the grommet 11. The pair of guide portions 35 are arranged at positions different from the pair of fitting portions 34 in the circumferential direction as shown in Fig. 3B. In the counterclockwise direction L of the circumferential direction, the fitting portion 34, the guide portion 35, the fitting portion 34, and the guide portion 35 are arranged in this order. The pair of guide portions 35 are arranged point-symmetrically with respect to the central axis O.
[0025] Each of the guide portions 35 has a first guide portion 41 and a second guide portion 42. The pair of first guide portions 41 are disposed around the periphery of the insertion portion main body 32. The pair of first guide portions 41 are disposed point-symmetrically with respect to the central axis O in a plan view.
[0026] Each first guide portion 41 is disposed along the counterclockwise direction L from the end of the convex portion 36 on the counterclockwise direction L side. In the counterclockwise direction L, the convex portion 36, the first guide portion 41, the convex portion 36, and the first guide portion 41 are disposed in this order. As shown in FIG. 3A, the first guide portion 41 protrudes from the grommet side attachment portion 22 toward the front side direction C. As shown in FIG. 3B, in a plan view, the outer periphery 36a of the convex portion 36 and the outer periphery 41a of the first guide portion 41 are connected to form a circular shape.
[0027] As shown in FIG. 3C, the first guide portion 41 has an inclined surface 41s facing the front direction C and an inclined surface 41t facing the back direction D. The inclined surface 41s inclines toward the grommet-side mounting portion 22 as it advances in the counterclockwise direction L from the surface 36s on the front direction C side of the protrusion 36, and is connected to the flat portion 25 of the grommet-side mounting portion 22. The inclined surface 41t inclines toward the grommet-side mounting portion 22 as it advances in the counterclockwise direction L from the surface 36t on the back direction D side of the protrusion 36, and is connected to the flat portion 25 of the grommet-side mounting portion 22. As shown in FIG. 3B, a gap 39 is formed between the end of the first guide portion 41 on the counterclockwise direction L side and the adjacent protrusion 36 in the counterclockwise direction L.
[0028] The second guide portion 42 is disposed on the protrusion 36 adjacent to the first guide portion 41 in the counterclockwise direction L. The second guide portion 42 is an end portion on the clockwise direction R side of the protrusion 36. The second guide portion 42 has an inclined surface 42s that is inclined so as to approach the grommet side attachment portion 22 from the end on the clockwise direction R side toward the counterclockwise direction L.
[0029] The pair of anti-rotation protrusions 23 prevent rotation of the retainer 12 relative to the grommet 11. The pair of anti-rotation protrusions 23 are arranged point-symmetrically about the central axis O. The pair of anti-rotation protrusions 23 are arranged on the grommet side mounting portion 22. Each of the anti-rotation protrusions 23 protrudes from the grommet side mounting portion 22 in the front side direction C.
[0030] 3B, each anti-rotation protrusion 23 is disposed radially outward from the end of convex portion 36 on the clockwise R side. The shape and number of anti-rotation protrusions 23 are not particularly limited as long as they suppress relative rotation of retainer 12 with respect to the grommet in the removal direction (in this embodiment, rotation toward the clockwise R side) and do not impede relative rotation of retainer 12 with respect to the grommet in the mounting direction (in this embodiment, rotation toward the counterclockwise L side) when retainer 12 is mounted to the grommet.
[0031] (Retainer 12) Fig. 4A is a perspective view of the retainer 12 as viewed from the front side, Fig. 4B is a perspective view of the retainer 12 as viewed from the back side, and Fig. 4C is a plan view of the retainer 12.
[0032] As shown in FIGS. 4A to 4C, the retainer 12 has an insertion hole 51, a retainer side attachment portion 52, and a pair of fitted portions 53.
[0033] 2A and 2D, the insertion portion 21 of the grommet 11 is inserted into the insertion hole 51. The retainer side attachment portion 52 is attached to the grommet side attachment portion 22 of the grommet 11. As shown in FIG. 4C, the insertion hole 51 has an outer shape that is circular when centered on the above-mentioned central axis O (FIG. 2C), and a fitted portion 53, which will be described later, extends from a peripheral portion 62 toward the central axis.
[0034] The retainer side mounting portion 52 has a flat portion 61 and a peripheral portion 62, as shown in FIG. 4A and FIG. 4B. The flat portion 61 covers the surface of the flat portion 25 of the grommet side mounting portion 22 in the front side direction C, as shown in FIG. 2D. This restricts the movement of the grommet 11 in the front side direction C, and prevents the grommet 11 from coming off the retainer 12 in the front side direction C. The peripheral portion 62 is disposed on the side surface of the flat portion 61. The peripheral portion 62 is formed from the periphery of the flat portion 61 toward the back side direction D. The peripheral portion 62 covers the side portion of the flat portion 25 of the grommet side mounting portion 22. A pair of bolt holes 61a are formed in the flat portion 61 of the retainer 12. The pair of bolt holes 61a are formed to face the pair of bolt holes 22a of the grommet side mounting portion 22.
[0035] The pair of fitted parts 53 are disposed on the edge 51e of the insertion hole 51 as shown in FIG. 4A. The pair of fitted parts 53 are formed from the flat part 61 toward the central axis O as shown in FIG. 4C. The pair of fitted parts 53 are fitted into the fitting part 34 of the grommet 11 as shown in FIG. 4A and FIG. 2A. The pair of fitted parts 53 are formed point symmetrically about the central axis O. The fitted parts 53 are formed along the circumferential direction about the central axis O. Each fitted part 53 has a rising part 71, a protruding flat part 72, and an introduction part 73. The rising part 71 is formed to extend toward the front side direction C. The protruding flat part 72 is formed from the end of the rising part 71 in the front side direction C toward the central axis O. The protruding flat part 72 is formed parallel to the flat part 61. Each introduction part 73 is disposed on the counterclockwise direction L side of each protruding flat part 72. Each of the introduction portions 73 is inclined toward the back direction D as it advances in the counterclockwise direction L. The introduction portions 73 are used to introduce the fitted portion 53 into a position where it is fitted into the fitting portion 34 when the grommet 11 is assembled with the retainer 12. The surfaces of the protruding flat portion 72 and the introduction portion 73 of the fitted portion 53 in the front direction C are shown in Fig. 4A as front surface 53a (an example of the surface on the fitting portion side), and the surfaces in the back direction D are shown in Fig. 4B as back surface 53b (an example of the surface opposite the fitting portion).
[0036] (Assembly of grommet assembly 3) 5A to 5C are diagrams for explaining the assembly of grommet assembly 3 of this embodiment.
[0037] 5A, the insertion portion 21 of the grommet 11 is inserted into the insertion hole 51 of the retainer 12. Here, the insertion is performed while rotating the retainer 12 in the counterclockwise direction L relative to the grommet 11 so that the back surface 53b (see FIG. 4B) of the fitted portion 53 of the retainer 12 faces the inclined surface 41s of the first guiding portion 41 and the rising portion 71 of the fitted portion 53 is aligned along the outer periphery 41a of the first guiding portion 41.
[0038] When the retainer 12 is further rotated in the counterclockwise direction L relative to the grommet 11 from the state shown in Figure 5A, as shown in Figure 5B, the portion of the introduction portion 73 on the surface 53a of the mating portion 53 of the retainer 12 is guided by the inclined surface 42s of the second guiding portion 42, and the mating portion 53 is led to the mating portion 34 of the grommet 11.
[0039] When retainer 12 is further rotated in counterclockwise direction L relative to grommet 11 from the state shown in Fig. 5B, fitted portion 53 of retainer 12 fits into fitting portion 34 of grommet 11, as shown in Fig. 5C. Position P where fitted portion 53 fits into fitting portion 34 as shown in Fig. 5C is an example of a predetermined position. Position P is a position on the rear side direction D side of locking portion 38.
[0040] Furthermore, retainer side mounting portion 52 of retainer 12 is disposed so as to cover grommet side mounting portion 22 of grommet 11, and bolt hole 61a of retainer side mounting portion 52 is disposed at a position opposing bolt hole 22a of grommet side mounting portion 22. Furthermore, each anti-rotation protrusion 23 is disposed on the clockwise direction R side of each fitted portion 53. As a result, even if retainer 12 rotates in the clockwise direction R relative to grommet 11, fitted portion 53 abuts against anti-rotation protrusion 23, thereby restricting rotation.
[0041] 5D is a side view of FIG. 5C as viewed in the direction of arrow B. As shown in FIG. 5D, rotation of retainer 12 in counterclockwise direction L is restricted by introduction portion 73, which is the end of fitted portion 53 in the counterclockwise direction L, abutting against inclined surface 41t of first guiding portion 41.
[0042] (Features, etc.) In the grommet assembly 3 of the present embodiment, by simply guiding the fitted portion 53 to position P by the guide portion 35, the fitted portion 53 is fitted into the fitting portion 34, so that the retainer 12 can be easily attached to the grommet 11. Furthermore, by fitting the fitting portion 34 into the fitted portion 53, movement of the grommet 11 relative to the retainer 12 along the front side direction C (an example of a restricting direction) including the direction of the axis M can be restricted.
[0043] In the grommet assembly 3 of this embodiment, the guide portion 35 is provided at a different position in the circumferential direction of the insertion portion 21 with respect to the fitting portion 34, so that the fitting portion 34 and the fitted portion 53 are fitted together simply by moving the fitted portion 53 of the retainer 12 to the fitting portion 34 along the guide portion 35. This makes insertion easier than a configuration in which the fitting is performed by bending the fitting portion.
[0044] In the grommet assembly 3 of this embodiment, the first guide portion 41 and the second guide portion 42 guide the mating portion 53 to a predetermined position where it is mated with the mating portion 34, making it easy to attach the retainer 12 to the grommet 11.
[0045] In the grommet assembly 3 of the present embodiment, the second guide portion 42 guides the fitted portion 53 to the position P where it is locked by the locking portion 38, so that the retainer 12 can be easily attached to the grommet 11.
[0046] In the grommet assembly 3 of this embodiment, the mated portion 53 can be guided along the inclined surfaces 41s, 42s to the position P where it is mated with the mating portion 34, so that the retainer 12 can be easily attached to the grommet 11.
[0047] In the grommet assembly 3 of this embodiment, while inserting the insertion portion 21 of the grommet 11 into the insertion hole 51 of the retainer 12, the guide portion 35 can guide the mating portion 53 to the position P where it is mated with the mating portion 34, so that the retainer 12 can be easily attached to the grommet 11.
[0048] (Other embodiments) Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.
[0049] (A) In the grommet assembly 3 of the above embodiment, the grommet 11 has a pair of guide portions 35, but there may be only one guide portion 35, or three or more guide portions 35. In addition, the guide portion 35 has the first guide portion 41 and the second guide portion 42, but there may be only one of the guide portions, for example, only the first guide portion 41.
[0050] (B) In the grommet assembly 3 of the above embodiment, the grommet 11 has a pair of fitting portions 34, but this is not limited thereto, and three or more fitting portions 34 may be provided.
[0051] (C) In the grommet assembly 3 of the above embodiment, the axis M of the insertion hole forming portion 33 is inclined with respect to the front side direction C. However, it may be arranged along the front side direction C without being inclined.
[0052] (D) In the grommet assembly 3 of the above embodiment, the retainer 12 is assembled to the grommet 11 by rotating the retainer 12 in the counterclockwise direction L relative to the grommet 11. However, the retainer 12 may be assembled by rotating it in the clockwise direction R. [Industrial Applicability]
[0053] The grommet assembly of the present invention exhibits the advantage that the grommet and retainer can be easily attached and are difficult to come off, and is useful as a control cable assembly, etc. [Explanation of symbols]
[0054] 3: Grommet Assembly 11: Grommet 12: Retainer 21: Insertion section 22: Grommet side mounting part 34: Fitting part 35: Information department 52: Retainer side mounting part 53: Fitted part
Claims
1. A grommet assembly comprising a grommet and a retainer, The grommet is an insertion portion including an insertion hole through which a cable is inserted and a fitting portion into which the retainer is fitted; a grommet side mounting portion to which the retainer is attached; The retainer includes: a fitted portion into which the fitting portion is fitted; a retainer side mounting portion that is attached to the grommet side mounting portion, the fitting portion is fitted into the fitted portion in a restriction direction including an axial direction along an axis of the insertion hole, the insertion portion further includes a guide portion that guides the fitted portion to a predetermined position where the fitted portion is fitted to the fitting portion, The guide portion is provided at a different position in a circumferential direction of the insertion portion with respect to the fitting portion. Grommet assembly.
2. The guide unit is a first guide portion that guides a surface of the fitted portion opposite to the fitting portion; and a second guide portion that guides a surface of the fitted portion on the fitting portion side. The grommet assembly of claim 1 .
3. The fitting portion is a locking portion that locks the fitted portion in the restricting direction, The guide unit is a second guide portion that guides the fitted portion to the predetermined position where the fitted portion is engaged with the engaging portion; The grommet assembly of claim 1 .
4. The guide portion has an inclined surface extending in a circumferential direction of the shaft. The grommet assembly of claim 1 .
5. the retainer has an insertion hole into which the insertion portion is inserted, The retainer side attachment portion is disposed around the insertion hole and is formed from an edge of the insertion hole, The fitted portion is disposed so as to protrude inward from an edge of the insertion hole. The grommet assembly of claim 1 .
6. A grommet assembly according to any one of claims 1 to 5; A control cable is inserted through the insertion hole. Control cable assembly.
Citation Information
Patent Citations
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