JPH0332067Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a connector that can reliably connect a cord to an electrical device.

[Conventional technology]

As a connector attached to electrical equipment, etc.,
Various proposals have been made in the past, but first of all, it is required that the cord can be connected reliably, that installation and removal operations are easy, and that there is little damage to the core wire. Therefore, for example, one end of the terminal piece may be bent and fixed to one end of the core wire, and the other end may be fixed to a terminal provided on the device main body side with a set screw.
A core wire insertion hole is formed in the connector body attached to the chassis of the device body in the radial direction, one end of the core wire is inserted through the insertion hole, and the core wire is inserted by a cap screwed onto the connector body. There are known connectors that are fixed to the connector body.

[Problem that the invention attempts to solve]

By the way, all of the conventional connectors mentioned above have a simple structure and do not require soldering, so they have the great advantage of making cord attachment and detachment simple and easy. Since the terminal strips are exposed, dust adhesion can cause connection failures, and metal contact or rainwater adhesion can lead to short circuits, and it can be dangerous if the human body accidentally touches them. Ta. On the other hand, in the latter case, when the cap is tightened, the core wire receives a shearing force at the opening edge of the core wire insertion hole, causing the wire to bend or, in the worst case, to break. Additionally, when the cap is rotated, the core wire tends to be rotated due to friction with the end surface of the cap, so in the case of multi-core cords, the connecting ends may come apart or twist, making them more likely to break. be.

[Means for solving problems]

The connector according to the present invention was made to solve the above-mentioned problems and realize a good electrical connection, and the connector is made by inserting a contact parallel to the axis into one end surface of the first holder through which the cord insertion hole is formed. A hole and a cord lead-out groove that communicates the cord insertion hole with the insertion hole are provided, and the core wire of the cord inserted into the cord insertion hole is guided into the cord lead-out groove, and the core wire is inserted into one end of the movable contact. A holding part is provided, the holding part is inserted into the contact insertion hole to hold the core wire in the cord lead-out groove, and a contact holding part is provided at one end of the fixed contact to hold the other end of the movable contact. , a fitting hole into which one end of the first holder fits into the second holder, and a contact that communicates with the fitting hole and accommodates the contact holder of the fixed contact and the other end of the movable contact in a coupled state. A storage hole is provided, the other end of the fixed contact protrudes from the contact storage hole to the outside of the holder, and a cap is screwed onto the second holder to integrally connect the first and second holders. It is something.

[Effect]

In the present invention, a cord is connected to an electrical device using a fixed contact and a movable contact, and the connected state of both of these contacts is maintained by first and second holders, and further, both of these holders are integrally connected by a cap. , protecting both contacts from dust, water, etc.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a half-sectional view showing an embodiment of the connector according to the present invention, FIGS. 2 a to d are half-sectional views, left side view, right side view, and plan view of the first holder, and FIGS. 3 a, b is a plan view and front view of the moving contact; FIGS. 4 a and b are a plan view and front view of the fixed contact; FIGS. 5 a, b, and c are half-sectional views, left side view, and right side view of the second holder. Figures 6a and 6b are a half sectional view and a right side view of the cap. In these figures,
The connector 1 according to this embodiment is applied to a three-core cord 2, and includes a first holder 3 into which one end of the cord 2 is inserted. As the cord 2, a general vinyl cord for appliances is used, and three core wires 2A, 2B are arranged in parallel.
2C, a vinyl insulator 4 that insulates and covers each core wire 2A, 2B, and 2C, and a vinyl sheath 5 that further protects the vinyl insulator 4. In this case, the cord 2 is used in which each core wire 2A, 2B, and 2C is composed of a large number of thin conductors, but it goes without saying that the cord 2 is not limited to this and may be composed of a single wire. .

By the way, the first holder 3 is integrally formed of synthetic resin, so as shown in FIG. Three contact insertion holes 7
a, 7b, and 7c are equally distributed in the circumferential direction to form the holder 3.
is formed parallel to the axis of Furthermore, these insertion holes 7a, 7b, and 7c are flat holes that are perpendicular to the radial direction of the first holder 3, and extend to approximately the center of the holder 3. Further, on one end surface of the first holder 3, there is provided a hole 3 for communicating the cord insertion hole 6 with each of the contact insertion holes 7a, 7b, and 7c.
Three cord lead-out grooves 8a, 8b, and 8c are formed. These cord lead-out grooves 8a, 8b, and 8c have approximately half the depth of the contact insertion holes 7a, 7b, and 7c. The protruding ends of the core wires 2A, 2B, and 2C protruding from the cord insertion hole 6 are bent outward of the first holder 3, as shown in FIGS. 2 and 7a, so that the cords can be led out. Groove 8
The protruding ends inserted into the grooves a, 8b, and 8c and protruding from the grooves toward the outer circumferential side of the first holder 3 are cut off.
A large diameter portion 11 having a circumferential groove 10 is integrally provided on the outer peripheral surface of the other end of the first holder 3 . The diameter of the cord insertion hole 6 is such that an open end on the cord insertion side, that is, an open end on the large diameter portion 11 side, is approximately equal to the diameter of the cord 2, and an open end on the opposite side;
That is, the open end on the contact insertion hole side is set smaller than the cord diameter. Therefore, a step 1 for locking the cord 2 is provided at the inner central portion of the cord insertion hole 6.
2 is provided.

20 is each core wire 2A, 2B, 2c of the cord 2
This movable contact 20 is formed by punching a metal plate into the shape shown in FIG. Two-pair core wire holding section 2 consisting of holding pieces 22a and 22b
2 are integrally provided. This core wire holding part 22
As shown in FIG. 7a, each contact insertion hole 7a,
7b, 7c, the core wires 2A, 2B, 2C guided to the cord lead-out grooves 8a, 8b, 8c are held by a pair of holding pieces 22a, 7c, respectively.
22b, whereby the core wires 2A, 2
B, 2C are respectively fixed to the respective cord lead-out grooves 8a, 8b, 8C. And each of the holding pieces 22a,
Each contact insertion hole 7a,
Wedge-shaped slip-off prevention protrusions 23a, 23b are integrally provided to prevent slip-off from 7b, 7c.
In this case, the protrusions 23a and 23b are connected to each contact insertion hole 7.
A pair of holding pieces 2 are attached to the inner walls of a, 7b, and 7c.
By increasing the distance between 2a and 22b, it also has the function of increasing the holding force of these holding pieces to the core wire.

The other end of the moving contact 20 is connected to the contact insertion hole 7.
a, 7b, and 7c, and a fixed contact 30 shown in FIG. 4 is connected to this projecting end. The fixed contact 30 includes a contact holding part 31 that is integrally provided at one end thereof and holds the other end of the movable contact 20, and a rectangular contact holding part 31 integrally provided on one side of the base side of the contact holding part 31. Fallout prevention protrusion 32
and a slip-off prevention piece 3 cut and raised on the surface of the other end.
3. The contact holding part 31 is composed of a pair of left and right holding pieces 31a and 31b that face each other, and protrusions 34a and 34b are provided on the inner surface of the distal end thereof, and the spacing between these protrusions 34a and 34b is as described above. It is set smaller than the plate thickness of the moving contact 20. The other end of the movable contact 20 is connected to the holding piece 31 of the fixed contact 30 as shown in FIGS. 1 and 7b.
a, 31b, and the protrusions 34a, 34
It is held by b. Therefore, moving contact 2
0 and the fixed contact 30 are assembled so as to be perpendicular to each other.

Reference numeral 40 denotes a second holder whose one end is inserted into a connector mounting hole 42 provided in a chassis 41 (FIG. 1) of an electrical device and fixed with a nut (not shown). By being formed into a cylindrical body with one end open as shown in the figure,
One end of the first holder 3 has a fitting hole 43 into which the small diameter portion 14 fits. Further, a collar 44 that comes into contact with the surface of the chassis 41 is integrally provided at the center of the outer circumferential surface of the second holder 40, and a male thread on both outer circumferential surfaces of the collar 44 is screwed into which a cap 60, which will be described later, is screwed. A male threaded portion 45B is formed into which a nut (not shown) for fixing the second holder 40 to the chassis 41 is screwed.

An annular groove 46 is formed on the surface of the collar 44 that is in contact with the chassis 41, and an O
The connector mounting hole 42 is sealed by a ring 47 (see FIG. 1). Further, an O-ring 48 is fitted to the outer circumferential surface of the small diameter portion 14 of the first holder 3, thereby connecting the small diameter portion 14 and the fitting hole 4.
It seals the gap between 3. Further, on the other end surface of the second holder 40, three contact storage holes 48A, 48B, and 48c, which are parallel to the axis of the holder and communicate with the fitting hole 43, are equally spaced in the circumferential direction. Each contact storage hole 48A, 48B,
48c is constituted by a flat hole flat in the radial direction of the second holder 40, so that it is perpendicular to each contact insertion hole 7a, 7b, 7c of the first holder 3, and its depth is equal to that of the contact of the fixed contact 30. Distance L from the tip of the holding part 31 to the slip-off prevention piece 33 (see Fig. 4)
almost equal to In addition, each contact storage hole 48A, 48
The width W ₁ of the opening end of B, 48C is the fixed contact 3
The width W of 0 is set approximately equal to or slightly larger than ₂ ,
The inner back side is set to be approximately equal to or slightly larger than the width W ₃ of the portion of the fixed contact 30 where the dropout prevention protrusion 32 is provided. Therefore, the fixed contact 30
From the fitting hole 43, each contact storage hole 48A, 48B,
48C, and in that case, the end opposite to the contact holding part 31 passes through each of the contact storage holes 48A, 48B, and 48C, and is inserted and connected to a connecting part in an electrical device. The fixed contact 30 is
The contact holding portion 31 is connected to each contact storage hole 48A, 48.
When stored in holes B and 48C, the slip-off prevention protrusion 32 and slip-off prevention piece 33 prevent the slip-off from the holes. In this case, the detachment prevention protrusion 32 comes into contact with the stepped portion 50 provided inside each contact storage hole 48A, 48B, 48C, so that
Prevents the fixed contact 30 from coming off to the electrical equipment side,
The slip-off prevention piece 33 abuts and engages with the side surface of the second holder 40 to prevent slip-off toward the first holder 3 side.

Furthermore, each of the contact storage holes 48A, 48B, 48
The movable contact 20 held by the contact holding part 31 of the fixed contact 30 is located at the innermost part of C.
A storage groove portion 52 for storing the other end portion is formed in communication with the storage groove portion 52 . This storage groove portion 52 is connected to the contact storage hole 48.
Consists of flat grooves perpendicular to A, 48B, and 48C,
The open end on the contact insertion side, that is, the open end on the fitting hole 43 side, has a funnel shape in which the width and height gradually increase toward the fitting hole 43 in order to facilitate insertion of the movable contact 20. ing.

The cap 60 integrally connects the first and second holders 3 and 40, and has a cylindrical body with both ends open as shown in FIG. A female thread 61 is formed to be screwed into the male thread 45B of the cord 2, and the other end thereof is tapered and has an opening 62 having a hole diameter approximately equal to the diameter of the cord 2.

Thus, in the connector 1 having such a configuration, the movable contacts 20 are inserted into the respective contact insertion holes 7a, 7.
When inserted into the wires 2A, 2B, and 7c, the wire holding portion 22 clamps each of the wires 2A, 2B, and 2C guided to the respective cord lead-out grooves 8a, 8b, and 8c.
Connections between A, 2B, and 2C and the movable contact 20 can be made with one touch, and a good connection can be obtained without damaging or cutting the core wire. Furthermore, the connection between the moving contact 20 and the fixed contact 30 is extremely simple and easy, as it is only necessary to insert the other end of the moving contact 20 into the contact holding part 31 of the fixed contact 30. 2C, and furthermore, the fixed contact 30 can be attached to the second holder 40 by inserting the contact 30 into each contact storage hole 48A, 4 of the second holder 40.
8B and 48C, and the other end needs to protrude outside from the storage hole, which is extremely simple. In addition, the contact holding part 3 of the fixed contact 30
1 holds the other end of the moving contact 20, so
The electrical connection between both contacts 20 and 30 is also reliable. Furthermore, the core wires 2A, 2B, 2C moving contacts 20
and the fixed contact 30 to the first and second holders 3 and 4.
0 and cap 60, it is waterproof, dustproof, and safe.
Prevent poor connections.

Although the above embodiment has been described with reference to the case where it is applied to the three-core cord 2, the present invention is not limited to this in any way, and can also be applied to a cord consisting of a single wire, a two-core cord, etc.

[Effect of idea]

As explained above, since the connector according to the present invention is configured as described above, it is excellent in waterproofness, dustproofness, safety, etc., and can easily and securely connect a cord to an electrical device. When connecting with the wire, the core wire is simply held and is not subjected to external forces such as tension or twisting, so damage, breakage, kinking, unraveling, etc. are reduced, and durability can be improved. moreover,
The connector is easy to assemble and has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view showing an embodiment of the connector according to the present invention, FIGS. 2 a to d are half-sectional views, left side view, right side view, and plan view of the first holder, and FIGS. 3 a, b is a plan view and front view of the moving contact; FIGS. 4 a and b are a plan view and front view of the fixed contact; FIGS. 5 a, b, and c are half-sectional views, left side view, and right side view of the second holder. Figures 6a and 6b are half-sectional views and right side views of the cap, and Figures 7a and 7b are views showing how the movable contact is attached to the first holder and the state where the fixed contact is attached to the movable contact. It is a diagram. 1... Connector, 2... Cord, 2A, 2B,
2C... Core wire, 3... First holder, 6... Cord insertion hole, 7a, 7b, 7c... Contact insertion hole, 8
a, 8b, 8c... Cord lead-out groove, 20... Moving contact, 22... Core wire holding part, 30... Fixed contact,
31...Contact holding part, 40...Second holder, 43
...Fitting hole, 45...Male thread, 48A, 48
B, 48C...Contact storage hole, 60...Cap,
61...Female thread.

Claims (1)

[Scope of utility model registration request] A cord insertion hole through which one end of the cord is inserted is formed, and a contact insertion hole parallel to the axis and a cord lead-out groove for communicating the cord insertion hole with the contact insertion hole are formed on one end surface. 1 holder, a movable contact having a core wire holding part at one end and holding the core wire of the cord guided to the cord lead-out groove by inserting the holding part into the contact insertion hole, and one end part. A fixed contact is provided with a contact holding part that holds the other end of the moving contact, a fitting hole into which one end of the first holder is fitted is formed on one end, and the other end is provided with a contact holding part that holds the other end of the moving contact. a second holder formed with a contact storage hole that communicates with the fitting hole and into which the contact holding part of the fixed contact and the other end of the movable contact are inserted in a coupled state; a cap screwed onto the outer peripheral surface to integrally connect the holder and the first holder; the fixed contact is inserted into the contact storage hole from the fitting hole;
A connector characterized in that the other end protrudes to the outside.