JP4933398B2 - Slim boots for modular plugs - Google Patents

Description

  The present invention relates to a slim boot for modular plugs, and more particularly to a slim boot for modular plugs that can be easily attached to and detached from a modular plug connected to one end of a cable.

  When a modular plug boot is used by connecting a cable such as a LAN cable to the modular plug, the cable is damaged by a strong force or bending on the cable portion exposed from the rear end of the plug housing of the modular plug. Used to prevent this. As a boot for a modular plug that is generally used, for example, as shown in Patent Document 1, a boot having a locking piece formed with a first locking portion is attached. After inserting into the inside of the plug housing, an integral type modular plug boot to be attached to the modular plug is obtained by caulking and fixing the locking piece of the boot and the cable together.

  However, the integrated modular plug boot is caulked in the plug housing, and the plug and the boot are integrated, so that some trouble has occurred in the modular plug and the connecting portion between the modular plug and the cable. In this case, even if the modular plug slim boot has no problem, it has to be disposed because it is integrated with the modular plug, and the modular plug slim boot cannot be reused.

  Further, as modular plug boots to be reusable, for example, a modular plug boot as described in Patent Document 2 and a modular plug boot 100 shown in FIG. Examples of the boot that can be attached to and detached from the modular plug, which are configured to cover the outside of the modular plug, are not integrated. However, the boot for the modular plug is larger in the size of the boot main body 110 than the outer shape of the modular plug. There was a problem that it could not be used.

  Therefore, in order to solve the above problems, slim boots for modular plugs that are detachable from the modular plug have been developed. For example, as shown in FIG. 1B, the boot main body 210 having a hollow hole 220 through which the cable passes and a contact surface 230 that abuts against a rear end surface of the modular plug when the modular plug is installed. Modular plug slim boot 200 or the like.

However, the above-described modular plug slim boot 200 can be easily attached and detached, and although it is a boot in which the boot body 210 is slimmed, it has a mechanism for maintaining the mounting state with the modular plug. Therefore, the connection force with the modular plug is weak, and when the cable is moved greatly, there is a problem that the boot comes off immediately.
Japanese Patent Laid-Open No. 2007-200785 US Pat. No. 5,538,438

  An object of the present invention is a modular plug that can be easily attached to and detached from a modular plug, and can be effectively held even when a strong force such as a bending force is applied to the cable after mounting. It is to provide slim boots for use.

The present invention has been made based on such findings, and the gist thereof is as follows.
(1) A hollow hole that can be inserted and removed from the other end of the cable connected to a modular plug having a plug housing formed with a recess in an inner wall surface that defines a space for introducing a cable at one end, and the modular plug A boot body having a contact surface that abuts against the rear end surface of the modular plug, and projects from the contact surface of the boot body along the longitudinal direction of the boot body, and the contact surface of the modular plug A pair of projecting pieces inserted into the space of the plug housing along the inner wall surface of the plug housing when the boot body is mounted in a state of abutting against the rear end surface; Among the pieces, one protruding piece is a locking piece having a locking portion that engages with a recess formed on the inner wall surface of the plug housing at the tip, and the other protruding piece is A slim boot for a modular plug, characterized in that it is a guide holding piece that guides insertion of the one protruding piece along the inner wall surface of the plug housing and elastically holds the engagement with the recess. .

(2) The modular plug slim boot according to the above (1), wherein there are two pairs of protrusion pieces forming the pair.

(3) The shape of the space opened in the rear end surface of the modular plug is a rectangle, the cable is a round cable, and the round cable is inserted between the round cable and the space when the round cable is inserted into the space. The modular plug slim boot according to (1) or (2), wherein the two pairs of projecting pieces are inserted into gaps at four corners to be formed and attached to the modular plug.

(4) The concave part of the inner wall surface of the plug housing is a through hole formed when the cable is caulked and fixed, for the modular plug according to (1), (2) or (3) above Slim boots.

(5) The above-mentioned (1), wherein the width of the locking piece is 0.3 to 1.8 mm and the width of the guide holding piece is 0.8 to 2.0 mm in a plan view from above the boot body. Slim boot for modular plugs given in any 1 paragraph of-(4).

(6) The modular plug slim boot according to any one of (1) to (5), wherein the protruding length of the guide holding piece is longer than the protruding length of the locking piece.

(7) The boot for a modular plug according to any one of (1) to (6) above, wherein the boot body is made of PP, PE, PVC, or engineering resin.

  According to the present invention, a modular plug that can be easily attached to and detached from the modular plug, and can be effectively held even when a strong force such as a bending force is applied to the cable after the mounting. Slim boots can be provided.

  Hereinafter, the configuration of the present invention and the reasons for limitation will be described with reference to the drawings.

FIG. 2 is a view of a state before the modular plug slim boot for modular plug according to the present invention is mounted from obliquely above.
As shown in FIG. 2, the modular plug slim boot 10 according to the present invention includes a boot body 11 and a pair of protruding pieces 14. Below, each part of the said slim boot 10 for modular plugs is demonstrated in detail.

FIG. 3 is a side view of the modular plug slim boot of the present invention, the modular plug, and the cable. FIG. 3 (a) shows a state before mounting, and FIG. 3 (b) shows a state after mounting. It is a figure.
As shown in FIGS. 3A and 3B, the boot body 11 of the present invention is a plug formed by forming a recess 33a in an inner wall surface 33 that defines a space 32 for introducing the cable 20 at one end. A hollow hole 12 that can be inserted and removed from the other end of the cable 20 connected to the modular plug 30 having the housing 31, and a contact surface 13 that abuts against the rear end surface 34 of the modular plug 30 when the mounting to the modular plug 30 is completed. .

  The boot body 11 is preferably made of PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), or engineering resin. These materials have a hardness that is preferable for use as a boot, and when other materials are used, the result is that the material becomes too soft and cannot be attached to the modular plug 30 or the material becomes too hard. This is because the mobility may be lost. 2 and 3, the boot body 11 is provided with a slit 11a for enhancing the mobility, but it is not necessarily provided, and can be arbitrarily provided depending on the hardness of the boot body 11 or the like. .

  Furthermore, as long as the hollow hole 12 is hollow and the cable 20 can be introduced, the shape is not particularly limited, and may be cylindrical or polygonal cylindrical. The outer shape of the cable 20 is preferably substantially the same so that the cable can be protected. The contact surface 13 is preferably a flat surface so that it can abut the rear end surface 34 of the plug housing 31.

  And the protrusion piece 14 which makes the pair of this invention protrudes from the said contact surface 13 of the said boot main body 11 along the longitudinal direction of the boot main body 11, and the said contact surface 13 is the back of the said modular plug 30. A pair of projecting pieces 14 inserted into the space 32 of the plug housing 31 along the inner wall surface 33 of the plug housing 31 when mounted in a state of being abutted against the end face 34, one of which The piece 14 is a locking piece 15 having a locking portion 15 a that engages with a recess 33 a formed in the inner wall surface 33 of the plug housing 31 at the tip, and the other protruding piece 14 is the locking piece 15. Is a guide holding piece 16 that guides insertion along the inner wall surface 33 of the plug housing 31 and elastically holds the engagement with the recess 33a.

  The inventors of the present invention have intensively studied the modular plug slim boot 10 that is detachable and can effectively hold the mounting state with the modular plug 30. As a result, a protruding piece 14 that protrudes from the contact surface 13 of the boot body 11 in the longitudinal direction of the boot body 11 and forms a pair of the locking piece 15 and the guide holding piece 16 is shown in FIG. When the boot body 11 is fitted to the rear end surface 34 of the modular plug 30 so that the locking portion 15a of the locking piece 15 engages with the recess 33a of the plug housing, In addition, the boot 10 can be effectively prevented from coming off without being caulked, and the guide holding piece 16 guides the locking piece 15 to be inserted along the inner wall surface 33 of the plug housing 31. In addition, even when the cable is moved up, down, left, and right, the engagement between the locking portion 15a and the recess 33a is elastically held by contacting the inner wall surface 33. DOO can result, we have found that it is possible to effectively hold the mounting state of the modular plug 30.

  In addition, as shown in FIG. 2, it is necessary that there are two pairs of protruding pieces 14 forming the pair. This is because by providing two pairs of the projecting pieces 14 forming the pair, the plug housing 31 comes into contact with the plug housing 31 at four locations, and a stable mounting state can be maintained.

  Here, FIG. 4 is a view of the modular plug 30 connected to the cable 20 as viewed from the rear end face side. The modular plug 30 is attached to the modular plug 30 as shown in FIG. The shape of the space 32 opened to the rear end surface 34 is a rectangle, the cable 20 is a round cable, and four corners formed between the round cable and the space 32 when the round cable is inserted. It is preferable to insert the two pairs of protruding pieces 14 into the gap portions 32 a to 32 d and attach them to the modular plug 30. This is because if the space 32 is rectangular and the cable 20 is a round cable, the gaps 32a to 32d are inevitably formed at the four corners, so that the two pairs of protruding pieces 14 can be easily inserted.

  Further, as shown in FIGS. 3A and 3B, the recess 33 a of the inner wall surface 33 of the plug housing 31 is preferably a through hole 33 a formed when the cable 20 is caulked and fixed. The through-hole 33a is a through-hole inevitably formed below the projection 33b when the cable is caulked using a predetermined projection 33b in the housing 31 of the general modular plug 30. This is because it is provided at a preferred position for engaging with the locking portion 15a.

  5 (a) is a diagram of the modular plug slim boot 10 of the present invention as viewed from above, and FIG. 5 (b) is a diagram of the modular plug slim boot 10 of the present invention as viewed from the side. However, as shown in FIG. 5A, the width W1 of the locking piece 15 is 0.3 in plan view from above the boot body 11 (as viewed from the direction of arrow A shown in FIG. 5B). It is preferable that the width W2 of the guide holding piece 16 is 0.8 to 2.0 mm. If the width W1 of the locking piece 15 is less than 0.3 mm, the width is too small and the locking portion 15a may not have sufficient force to engage with the recess 33a. This is because the width may be too large to be inserted into the space 32 of the plug housing 31. Further, if the width W2 of the guide holding piece 16 is less than 0.8 mm, the width is too small, and the force for elastically holding the engagement between the locking portion 15a and the concave portion 33a becomes insufficient. This is because if the width exceeds mm, the width is too large and the plug housing 31 may not be inserted into the space 32. Here, when the slim boot is viewed from the side, the side on which the locking piece 15 is provided is the upper side, and the side on which the guide holding piece 16 is provided is the lower side.

  Further, as shown in FIG. 5 (b), the protruding length L 2 of the guide holding piece 16 is preferably longer than the protruding length L 1 of the locking piece 15. Even when the boot main body 11 is deformed as the cord 20 is deformed, the guide holding piece 16 is supported in contact with the inner wall surface of the housing 31, so that the locking portion 15 a is When the protrusion length L2 of the guide holding piece 16 is shorter than the protrusion length L1 of the locking piece 15, it serves to prevent the release from the recess 33a and elastically hold the engagement. This is because the engagement cannot be maintained.

  In addition, when the locking piece 15 is attached to the modular plug 30, the state of the locking piece 15 before mounting is horizontally in the longitudinal direction of the boot body 11 as shown in FIG. However, when the modular plug 30 is mounted, it is preferable that the range K in which the tip is displaced downward by the inner wall surface 33 of the plug housing 31 to be displaced downward is 0 to 1.0 mm. This is because if the locking piece 15 is displaced downward within the above range, the engaging force with the concave portion 33a of the inner wall surface increases.

  The above description is merely an example of the embodiment of the present invention, and various modifications can be made within the scope of the claims.

Example 1
As Example 1, as shown in FIGS. 5A and 5B, a boot body 11 made of polypropylene having a hollow hole 12 and a contact surface 13 and two pairs of projecting pieces 14 projecting from the boot body are provided. The modular plug slim boot 10 has a width of the locking piece 15 of the projection piece 14 of 1.5 mm and a protruding length of 5.5 mm, a width of the guide holding piece 16 of 1.5 mm and a protruding length of 7.0 mm. Prepared as a sample.

Comparative example

(Comparative Example 1)
As a comparative example 1, as shown in FIG. 1B, a modular plug slim boot 200 having no pair of protruding pieces and having a boot body 210 and a hollow hole 220 was prepared as a sample.

(Evaluation methods)
The modular plug slim boot obtained as described above was evaluated according to the following evaluation method.

(1) Mounting holding force against cable bending After attaching the modular plug slim boot for each sample to the rear end of the modular plug connected to the cable, the end of the cable is adjusted so that the angle with the modular plug is 90 °. The test was performed to measure the number of times until the boot was detached from the modular plug. The results of each sample are shown in Table 1.

(2) Holding force against tension After attaching the boot of each sample to the rear end of the modular plug connected to the cable, pull the boot in the opposite direction to the modular plug while increasing the force (N). A test for measuring the force (N) when the boots were removed was performed. The results of each sample are shown in Table 1.

  From the results shown in Table 1, in comparison with the modular plug slim boot of Comparative Example 1 in which the boot body is not provided with the protrusion piece 14, the embodiment 1 in which the protrusion piece 14 is provided has about 100 times until the modular plug is detached. It was found that the modular plug slim boot of Example 1 had a larger mounting holding force than that of Comparative Example 1 because the force required to pull and remove about 10 times more was required.

  According to the present invention, a modular plug that can be easily attached to and detached from the modular plug, and can be effectively held even when a strong force such as a bending force is applied to the cable after the mounting. Slim boots can be provided.

It is the perspective view which showed the state before mounting | wearing with the modular plug of the conventional modular plug boot, (a) is a modular plug boot which covers a modular plug, (b) is a removable modular plug slim. Boots are shown. It is the perspective view which showed the state before mounting | wearing with the modular plug of the slim boot for modular plugs of this invention. It is a figure which shows the slim boot for modular plugs of this invention, Comprising: (a) is the state before mounting | wearing with a modular plug, (b) is a sectional side view which showed the state at the time of mounting | wearing with a modular plug. It is a top view which shows the state which observed the modular plug and cable of this invention from the back of the modular plug. It is a figure which shows the slim boot for modular plugs of this invention, Comprising: (a) is the state observed from upper direction, (b) is a top view which shows the state observed from the side.

Explanation of symbols

10, 200 Modular plug slim boot 100 Modular plug boot 11, 110, 210 Boot body 12, 120, 220 Hollow hole 13 Contact surface 14 Projection piece 15 Locking piece 16 Guide holding piece 20 Cable 30 Modular plug 31 Plug housing 32 Space 33 Inner wall 34 Rear end face

Claims (4)

A hollow hole that can be inserted and removed from the other end of the cable connected to a modular plug having a plug housing formed with a recess in the inner wall surface that defines a space for introducing the cable at one end, and mounting to the modular plug A boot body having a contact surface that, when completed, abuts the rear end surface of the modular plug;
When projecting from the contact surface of the boot body along the longitudinal direction of the boot body and mounting the boot body with the contact surface abutting against the rear end surface of the modular plug, the inner surface of the plug housing A pair of protruding pieces inserted into the space of the plug housing along the
Of the pair of protruding pieces, one protruding piece is a locking piece having a locking portion that engages with a recess formed on the inner wall surface of the plug housing at the tip, and the other protruding piece is A guide holding piece for guiding the one protrusion piece to be inserted along the inner wall surface of the plug housing and elastically holding the engagement with the recess, and two pairs of the protrusion pieces forming the pair are provided. Slim boots for modular plugs, characterized by being.   The space opened at the rear end surface of the modular plug is rectangular, the cable is a round cable, and is formed between the round cable and the space when the round cable is inserted into the space. The slim boot for a modular plug according to claim 1, wherein the two pairs of projecting pieces are inserted into the gaps at the four corners to be attached to the modular plug.   The slim boot for modular plug according to claim 1 or 2, wherein the concave portion of the inner wall surface of the plug housing is a through hole formed when the cable is caulked and fixed.   The modular plug slim boot according to claim 1, 2 or 3, wherein the protruding length of the guide holding piece is longer than the protruding length of the locking piece.

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