JP2001014963A - Insulating sleeve for connecting terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly and easily mount and hold a connecting terminal. SOLUTION: In this sleeve A, both upper and lower faces 1a, 1b in a sleeve body 1 are protrusively provided with slip-off stop protrusions 2. The slip-off stop protrusion 2 is provided with a reverse tapered face 2c which enlarge gradually in diameter toward an abutting face 1e, and an inclined face 2d made higher gradually in the same direction. The head part 4c side of a fast-on terminal 4 is therefore pushed into the sleeve body 1 to easily fit diameter contracted parts 2a of the slip-off stop protrusions 2 into the hollows of bent protruding parts 4, 4a, so that the Faston terminal 4 can be easily and smoothly inserted together with a covered electric wire 3. The fast-on terminal 4 is further pushed inward, while resisting frictional force with the slip-off stop protrusions 2, and the moment the lower edges 4b of the bent protruding parts 4a, 4a are engaged with diameter enlarged parts 2b, the Faston terminal 4 can be held in an immobile state between the slip-off stop protrusions 2 and the abutting face 1e in the sleeve body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an insulating sleeve for a connecting terminal which is mainly used for insulating a connecting terminal, and more particularly, to a useful and useful connecting terminal which can be smoothly and reliably inserted and held. The present invention relates to an insulating sleeve for connection terminals.

[0002]

2. Description of the Related Art Conventionally, as such an insulating sleeve for connection terminals, for example, the one disclosed in Japanese Utility Model Laid-Open No. 61-96475 is already known as a conventional example. This conventional insulating sleeve for connection terminals can accommodate a relatively large inlet made of an electrically insulating material to allow the connection terminal (faston terminal) attached to the insulated wire, and the connection terminal to be able to abut. It has an inner shape, and a retaining projection which engages with the connection terminal on the inner wall surface.

[0003]

However, in the above-described insulating sleeve for connection terminals disclosed in Japanese Utility Model Laid-Open Publication No. 61-96475, although the connection terminals can be prevented from coming off by engagement with the projections, the same is true. Because the projection extends in a direction perpendicular to the tip of the connection terminal, and also because the sleeve body is formed of a flexible electric insulating material,
It is difficult to insert / insert the connection terminal, which sometimes causes insulation failure.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to provide a useful insulating sleeve for a connection terminal which allows the connection terminal to be inserted and held very smoothly and easily. It was done.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems and to achieve the intended object, the gist of the present invention is to provide a sleeve body accommodating at least the connection terminal side in a detachable manner. An insulating sleeve for a connection terminal comprising: a retaining projection protruding from an inner wall surface of the sleeve main body; wherein the retaining projection has an inverse tapered surface whose diameter gradually increases toward a contact surface of the sleeve main body. Is formed in the insulating sleeve for connection terminals.

It is preferable that the retaining projection has an inclined surface which becomes gradually higher toward the abutting surface of the sleeve body.

Further, the retaining projection has a reduced-diameter side fitted between the bent projections of the connection terminal, and an enlarged-diameter side engaged with the lower end edge of the bent projection to connect the connection terminal inside the sleeve body. It is preferable that the thickness of the upper and lower surfaces of the sleeve body is different from the thickness of the left and right side surfaces.

In the insulating sleeve for a connection terminal according to the present invention having the above-described structure, the retaining projection forms an inverse tapered surface whose diameter gradually increases toward the abutting surface of the sleeve body. The connection terminals do not come into contact with the bent projections at right angles, in other words, fit well using the space (dent) between the opposed bent projections (see FIG. 3A).

In addition, since the retaining projection has an inclined surface that gradually becomes higher toward the abutting surface of the sleeve main body, it is easy to butt (fit) with the connection terminal, and as it goes further inward. The frictional force will gradually increase.

The retaining projection has a reduced-diameter side fitted between the bent projections of the connection terminal and an enlarged-diameter side engaged with the lower edge of the bent projection to connect the connection terminal inside the sleeve body. By maintaining alignment with the abutting surface, there is no fear that the connection terminal will fall off during insertion.

If the thicknesses of the upper and lower surfaces and the left and right side surfaces of the sleeve main body are different, the degree of deformation is different from each other.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the insulating sleeve for connection terminals according to the present invention will be described with reference to the drawings. In the figure, A is an insulating sleeve for a connection terminal according to the present invention.
As shown in FIG. 1, a sleeve main body 1 for inserting and supporting a connection terminal, which will be described later, and a retaining projection 2 protruding from the sleeve main body 1 are provided.

The sleeve main body 1 is appropriately molded integrally with an electrically insulating material such as a synthetic resin material, and has a size such that a faston terminal (connection terminal) 4 connected to one end of the covered electric wire 3 can be detachably accommodated. Is formed.

The sleeve body 1 is easy to grasp with fingers and the faston terminal 4 is easily inserted, in other words, both longitudinal side surfaces 1c and 1d are hard and easy to grasp.
The left and right side surfaces 1c and 1d are designed to be thicker than the upper and lower surfaces 1a and 1b so that the upper and lower surfaces 1a and 1b are soft and easy to insert.

On the other hand, as shown in FIGS. 2 and 3, the retaining projection 2 has upper and lower surfaces 1 a,
1b. In other words, this is measured without the need to turn the terminal upward or downward when the connection terminal is inserted into the main body of the unit (see FIG. 3).

The retaining protrusion 2 has a reverse tapered surface 2c (FIG. 2) whose diameter gradually increases toward the abutting surface 1e.
(See FIG. 3) and an inclined surface 2d (see FIG. 3) that gradually increases as going in the same direction.

This is for facilitating insertion and removal of the faston terminal 4 and, as shown in FIG. 4 (a), first, as shown in FIG. Between the bent projections 4a, 4a (hereinafter simply referred to as valleys) so that the reverse tapered surfaces 2c, 2c and the inclined surface 2
Since d and 2d cooperate, insertion can be performed smoothly.

Thereafter, the terminal 4 can be fed (pushed) smoothly by a small force by guiding the inclined surfaces 2d, 2d, and the lower end edges 4b in the longitudinal direction of the bent projections 4a, 4a.
(See FIG. 4 (b)) by engaging with the end face (the highest position) of the enlarged diameter portion 2b of the retaining projection 2 (see FIG. 4B). It is formed so as to be able to be properly retained (see FIG. 3).

The insulating sleeve A for a connection terminal of the present invention thus constructed is pressed into the head 4c side of the faston terminal 4 connected to the insulated wire 3 so that the valley between the bent projections 4a, 4a is pressed. Since the reduced diameter portion 2a of the retaining projection 2 is fitted (see FIG. 4A), the Faston terminal 4 can be easily and smoothly inserted together with the insulated wire 3.
Next, the lower end edge 4b of the bent projections 4a, 4a is engaged (falled) with the end face of the enlarged diameter portion 2b by being pushed further inward against the frictional force with the retaining protrusion 2 (FIG. b)), the Faston terminal 4 can be held immovably between the Faston terminal 4 and the abutment surface 1e in the sleeve body 1.

The insulating sleeve for connection terminals according to the present invention is not limited to the present embodiment, but can be freely designed and changed within the scope of the present invention. Is included.

[0021]

According to the present invention, as described above, the retaining projection has a reverse tapered surface whose diameter gradually increases toward the abutting surface of the sleeve main body. It does not abut against the bent projections in an orthogonal state, and fits each other using the space between the bent projections, so that the two members can be inserted and held very smoothly and easily. is there.

Further, since the retaining projection has an inclined surface that gradually becomes higher toward the abutting surface of the sleeve main body, it is easy to butt (fit) with the connection terminal, and it is more likely to go further. Since the frictional force gradually increases, even if the connection terminal once starts to be inserted into the sleeve main body, the connection terminal does not easily fall off (on the way).

The retaining projection has a reduced-diameter side fitted between the bent projections of the connection terminal, and an enlarged-diameter side engaged with the lower end edge of the bent projection to connect the connection terminal to the inside of the sleeve body. By maintaining the alignment with the abutting surface, it is possible to easily insert with a small force and to surely prevent the contact from coming off.

Further, if the thickness of the upper and lower surfaces of the sleeve body is different from that of the left and right sides, the degree of deformation is different. Therefore, even if a soft material is used for the temporary body or the sleeve body, it is not easily collapsed. In other words, there is an effect that it is easy to grasp and does not impair shape retention.

As described above, the present invention can provide a useful insulating sleeve for a connection terminal which can be easily inserted and securely prevented from coming off. Further, since the structure is simple, it is suitable for mass production, and the price is low. The present invention has enormous practical value in that the present invention can be supplied to consumers as inexpensive products.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an insulating sleeve for connection terminals according to the present invention.

FIG. 2A is a plan view of the insulating sleeve, and FIG.
Is a front view of the insulating sleeve, and FIG. 2C is a bottom view of the insulating sleeve.

FIG. 3 is an enlarged vertical sectional view of the insulating sleeve for a connection terminal.

FIG. 4 (a) is an explanatory view showing insertion of a faston terminal and a sleeve main body, and FIG. 4 (b) is an explanatory view showing a state in which the terminal is prevented from falling into the sleeve main body.

[Explanation of symbols]

 Reference Signs List 1 sleeve main body 1a upper surface 1b lower surface 1c left side surface 1d right side surface 1e abutting surface 2 retaining projection 2a reduced diameter portion 2b enlarged diameter portion 2c reverse tapered surface 2d inclined surface 3 coated electric wire 4 faston terminal 4a bent projection portion 4b lower end edge 4c head Department

Claims (4)

[Claims] 1. A connection terminal insulating sleeve comprising: a sleeve main body for detachably housing at least a connection terminal side; and a retaining projection protruding from an inner wall surface of the sleeve main body. An insulating sleeve for a connection terminal, wherein an inverted tapered surface gradually increases in diameter toward a contact surface of the sleeve body. 2. The insulating sleeve for a connection terminal according to claim 1, wherein said retaining projection has an inclined surface which becomes gradually higher toward an abutting surface of the sleeve body. 3. The retaining protrusion has a reduced-diameter side fitted between bent projections of the connection terminal, and an enlarged-diameter side engaged with a longitudinally lower end edge of the bent projection to connect the connection terminal to the sleeve body. The insulating sleeve for a connection terminal according to claim 1 or 2, wherein the insulating sleeve is held in alignment with an inner abutting surface. 4. The insulating sleeve for a connection terminal according to claim 1, wherein said sleeve body has different thicknesses between upper and lower surfaces and left and right side surfaces.