JPH0424620Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is a so-called pressure contact type connector that has a structure that electrically connects the contact and the cable by inserting the cable between the two forks of the U contact. It's about structure.

<<Prior Art>> In a press-contact type connector using a U-contact for the connection between a contact and a cable, the cable 3 is pulled out from the side surface of the connector body 1, as shown in FIG. A cable holder 22 called a strain relief is often installed in order to change the direction of the cable 3 pulled out to the connector insertion/removal direction and to prevent the U-contact from being damaged by external force acting from the cable.

The strain relief 22 includes locking pieces 6 on both sides and a locking recess 7 on the main body side, as shown in FIGS. 3 to 5.
is attached to the back of the connector main body 1 by mating,
Cable 3 pulled out from the side of the connector body
S so that it is loosely held between it and the connector body 1.
It is fixed by bending it into a letter shape.

The strain relief 22 usually has grooves 23 formed at both ends of the back surface, and by hooking the hooks 25 at both ends of the receiving connector 24 fixed to the printed board 11 into the grooves 23, the connector 1 can be moved from the receiving connector 24. It has a structure that prevents it from falling off.

However, when the strain relief 22 is attached, the cable is bent in an inverted manner immediately after being pulled out from the side surface of the connector body 1, so that a cable protrusion 3b as shown in FIG. 5 is formed at that part.

For example, when the printed boards 11 are disposed at narrow intervals in a shield structure or the like, the tips of lead pins protruding from the back side of adjacent printed boards come into contact with the cable protruding parts 3b, and the cable 3 There is a risk of injury to the As a countermeasure to this problem, Japanese Patent Application Laid-open No. 198063 discloses that an eaves (wall) is provided from the front end of the side of the strain relief so that the proximal end of the cable is covered by this eave when the strain relief is attached. A structural connector has been proposed.

In addition to the above-mentioned structure shown in FIG. 3 as a structure for preventing the connector 1 and the receiving connector 24 from coming off, Japanese Utility Model Application No. 59-55870 discloses a structure in which flexibility is provided from the front end of the side surface of the strain relief. For this purpose, a locking arm bent into a substantially U-shape is extended, and a claw is provided at the tip of the arm toward the outside, while a locking chamber for accommodating the U-shaped locking arm is provided in the receiving connector. A structure is disclosed in which an engaging portion that engages with the pawl is opened on the outer surface.

<<Problem to be solved by the invention>> The cable protection structure disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 198063/1983 has a structure in which an eave covering the cable is provided in a straight line from the front end of the strain relief. It cannot be used unless the strain relief is thick, and increasing the thickness of the strain relief just to provide an eave results in wasted material and increases the overall thickness of the connector, making it difficult to use a narrow printed board, for example. When adopting a shelf structure in which the printed boards are arranged at intervals, a problem arises in that the distance between the printed boards becomes wider and the storage space for the printed boards increases.

Furthermore, the connector retaining structure disclosed in Japanese Utility Model Application Publication No. 59-55870 has a locking arm bent in a U-shape from the front end of the strain relief. Since the amount increases and the substantial thickness of the connector increases, the spacing between printed boards in a shelf structure or the like becomes wider, and the mounting space of the printed boards increases, similarly to the above case.

This idea simultaneously achieves the protection of the cable and the prevention of the connector from coming off with a simpler structure, and also minimizes the increase in the thickness of the connector, increasing the mounting space for printed circuit boards in shelf structures, etc. This provides a cable protection structure that prevents damage from occurring.

<Means for Solving the Problems> The present invention includes a strain relief 2 attached to the back side of the connector main body 1 with a wide eaves that bends and extends from the rear end (opposite the main body side) of the side surface toward the main body 1 side. 4 is integrally provided, and the eaves 4 has a cover function to cover the base end 3a of the cable 3, and claws 5 are provided at both corners of the tip of the eaves 4 facing inward, and the side surfaces of the receiving connector 12 are provided. has a recess 1 facing the claw 5
3 to form an engaging pair for preventing the connector 1 from coming off.

<<Operation>> In the connector having the above structure, the eaves 4 extending from the strain relief 2 cover the side surface of the connector main body 1, and press the proximal end portion 3a of the cable against the connector side surface to protect it.

Since the eaves 4 of this invention extends from the rear end of the side surface of the strain relief 2 to the position of the side surface of the receiving connector, the proximal end thereof is bent, so that it can have a certain degree of flexibility. Due to the flexibility, the claw 5 at the tip of the eave 4 and the recess 13 of the receiving connector 12 can be engaged and disengaged to prevent and release the connector 1.

That is, by inserting the connector 1 into the receiving connector 12, the claws 5 of the eaves and the recesses 13 naturally engage, and in the engaged state, both sides of the eaves 4 can be pulled up, or the center of the eaves 4 can be pulled up. By pressing the part, the claw 5 is removed from the recess 13 and the connector 1 is removed.
can be removed from the receiving connector 12.

《Example》 Figures 1 and 2 show an example of this invention. Figure 1 is a perspective view showing each element separated, and Figure 2 is a cross-sectional view of only the receiving connector. FIG.

In the figure, 1 is the connector body, 2 is the strain relief, 3 is the flat cable pulled out from the connector body, 4 is the eaves provided integrally with the strain relief 2, and 5 is the eaves facing inward on both sides of the tip of the eaves 4. The claws provided, 6, a locking piece for locking the strain relief 2 to the connector body 1, 11, a printed board, 12, a receiving connector fixed to the printed board 11, and 13, provided on the side surface of the receiving connector 12. It is a concave place.

The connector body 1 has the same structure as the conventional one, and the cable 3 is pulled out to the side. The strain relief 2 is provided with locking pieces 6 at both ends, and the locking pieces 6 are fitted into locking recesses 7 at both mouth ends of the connector main body 1 . Strain relief 2
The cable 3 bent in an S-shape is loosely held and fixed between the connector body 1 and the connector body 1.

An eave 4 extending from the strain relief 2 covers the base end 3a of the cable 3 and presses it against the side surface of the connector body 1. This prevents the proximal end portion of the cable 3 from protruding, and protects the proximal end portion 3a from external damage.

Furthermore, when the connector body 1 with this strain relief 2 attached is inserted into the receiving connector 12,
At the insertion end, the claw 5 at the tip of the eave fits into the recess 13 of the receiving connector, and the claw 5 is hooked and locked in the recess 13, thereby preventing the connectors 1 and 12 from separating from each other. Therefore, an accident in which the connector 1 falls off from the receiving connector 12 due to vibration or the like is prevented, and reliable connection of the connector connection portion is ensured.

This fall-off prevention structure does not require the operation of hooking the hook 25 as in the conventional structure, and prevents the connector from falling off simply by inserting the connector 1 into the receiving connector 12.
Since it is not necessary to provide a protruding member such as 5, the entire connector can be formed compactly, and the space of the connector connecting portion can be saved.

In addition, this eaves 4 can be used as a space to write precautions for connector connections and handling, etc., and by pasting stickers 8 indicating connection relationships, etc., it is also possible to perform work and maintenance efficiently. become.

<<Effects of the invention>> According to the structure of this invention explained above, the cable can be protected by the eaves extending from the strain relief, and since this eaves can be given a certain degree of elasticity, the elasticity can be utilized. By engaging the claws at both corners of the tip of the eaves with the recesses of the receiving connector, it is possible to create a structure that prevents the connector from coming off.

The structure of the present invention has a simple shape in which a wide eave is bent and extends from the rear end of the side of the strain relief, so it does not increase the thickness of the strain relief or the receiving connector, and it can be attached to the side of the connector. Since the substantial increase in the thickness of the connector due to the provision of the eaves and the engaging pair can be minimized, it is possible to obtain a connector suitable for devices such as electronic computers that require high mounting density on printed boards. There is an effect.

[Brief explanation of drawings]

1 and 2 are views showing one embodiment of this invention, with FIG. 1 being a perspective view showing each element separated, and FIG. 2 being a side view showing only the receiving connector in section. 3 to 5 are explanatory diagrams of the conventional structure, with FIG. 3 being a diagram corresponding to FIG. 1, and FIGS. 4 and 5 being side views illustrating how the cable is held by the strain relief. In the figure, 1... Connector body, 2... Strain relief, 3... Flat cable, 4... Eaves,
5...Claw at the tip of the eave, 12...Receiving side connector, 1
3... Concavity.

Claims (1)

[Claim for Utility Model Registration] An eaves 4 is provided from a strain relief 2 attached to the back side of the connector body 1 toward the main body 1, and the eaves 4 covers the base end 3a of the cable 3 pulled out from the side of the main body. In a pressure contact type connector having a cover function, an eave 4 is bent and extends from the rear end of the side surface of the strain relief 2 toward the main body 1 side, and claws 5 are provided at both ends of the eave 4 facing inward. has been
A cable protection structure for a press-contact type connector, characterized in that a recess 13 facing the claw 5 is provided on the side surface of the receiving connector 12.