JPH024451Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an outdoor waterproof connector that is installed on the outer wall of a waterproof case that houses common circuits such as branch and distribution circuits. The present invention relates to a waterproof connector seat used for attaching and detaching a connector to which a cable is connected.

[Conventional technology and problems]

In recent years, with the diversification of high-frequency communication and information transmission methods, the frequency used has changed from 76 to 770 MHz for television public reception to 900 to 1450 MHz.
Intermediate frequency band (BS-IF band) for satellite broadcast reception
It has been increasing to. Therefore, in order to transmit this high frequency signal without distortion, various types of connector seats have been proposed for connecting a public listening circuit and a connector to which a coaxial cable is connected.

As a conventional plug seat, for example, the one shown in FIG. 4 is known. In the figure, reference numeral 1 denotes a waterproof case that houses a public listening circuit (not shown) such as a branching and distribution circuit, and a plug seat 10 is protruded from the outer wall of this waterproof case 1. The plug seat 10 has a cylindrical shape and has threaded portions 11 on the outer periphery of its rear end and tip.
a, 11b, and a threaded portion 11a at the rear end of the connector body 11.
is screwed onto the outer wall of the waterproof case 1. A center pin 12 is disposed approximately at the central axis within the connector body 11, and a hole 1 for receiving a coaxial cable core is provided at the center of the tip.
It is fixed with an insulator 13 provided with 3a. The rear end 12a of the center pin 12 protrudes from the connector body 11 into the waterproof case 1 and is connected to the public listening circuit inside the waterproof case 1, while the tip of the center pin 12 has a slit to provide spring properties. A receiving portion 12b for inserting a coaxial cable core is provided. The connector 20 to which the coaxial cable 15 is connected is screwed into the connector seat 10 configured as described above. The plug 20 includes a conductive shell 21 that is provided on the outer periphery of the end of the coaxial cable 15 and connected to the outer conductor of the coaxial cable 15, and a conductive shell 21 that is slidably provided on the outer periphery of the shell 21 and is connected to a screw of the plug seat body 11. Part 11
between the conductive connecting nut 22 that is screwed into the connecting nut 22, the insulator 23 that is interposed within the shell 21 and fixes the core wire 15a of the coaxial cable 15, and the outer circumferential surface of the shell 21 and the inner circumferential surface of the connecting nut 22. A gasket 24 made of rubber or the like seals the gasket. Connect the connecting nut 22 of such a plug 20 to the plug seat body 11.
The distal end surface 2 of the shell 21 is screwed into the threaded portion 11b of the shell 21.
If 1a is brought into contact with the front end surface of the valve body 11,
The core wire 15a of the coaxial cable 15 is inserted into the receiving part 12b of the center pin 12 through the hole 13a, and the two are connected. 11.

However, in the case of this type of connector seat 10, when the waterproof case 1 containing the public listening circuit is installed outdoors, the temperature inside the waterproof case 1 rises due to direct sunlight, and then squalls etc. When the waterproof case 1 is suddenly cooled down by
A large pressure of f·cm is applied to the valve seat 10. Even if the connector seat 10 is waterproof, there are cases where the elastic gasket 24 made of rubber or the like is not provided at the tip inside the connector seat body 11, or when the connector seat 10 and the connector 20 are connected. If the waterproof function is provided by rubber caps or taping at certain points, but this is not perfect, or if the caps or taping peel off due to aging, or if the waterproof case 1 that houses the common listening circuit In many cases, an unused connector seat 10 is provided for an unused terminal or a monitor terminal.
These are capped or taped to make them waterproof, but if these caps or tapings come off, rainwater will enter the valve seat body 11 through the hole 13a and the water will become waterproof. There is a risk that the common listening circuit in case 1 will be adversely affected by short circuit accidents. Therefore, regardless of the presence or absence of the center pin 12 in the valve seat body 11, it is necessary to protrude from the waterproof case 1 to prevent rainwater from entering through the opening at the tip of the valve seat body 11.

Therefore, a structure has been proposed in which an elastic gasket made of rubber or the like is interposed at the tip of the valve body 11 to prevent rainwater from entering. However, although this type of structure has excellent waterproof function,
When attempting to transmit high-frequency digital signals for satellite broadcasting using the connector base 10, since the dielectric constant of the gasket 24 is relatively high, the dielectric constant of the connector base body 11 is different from that of the insulator 13. The distribution state of capacitance generated between the main pin 12 and the center pin 12 becomes non-uniform, and the voltage standing wave ratio becomes considerably larger than 1, which deteriorates the impedance matching. Since the insulator 13 and the gasket 24, which are dielectrics, are interposed inside, the electrostatic capacitance generated between the connector body 11 and the center pin 12 becomes large, which has the drawback of increasing insertion loss. .

Therefore, in order to eliminate this drawback, the applicant of the present application first proposed a method with superior waterproofing effect in Utility Application No. 59-31337.
Furthermore, we have proposed an outdoor waterproof connector with excellent electrical characteristics and low voltage standing waves and insertion loss in the high-frequency signal region.

FIG. 5 and FIGS. 6 a to 6 f show a waterproof type connector seat according to Utility Model Application No. 59-31337. This waterproof type connector seat 30 includes a cylindrical conductive connector body 31 protruding from the outer wall of the waterproof case 1, and a connector body 3.
1, a cylindrical waterproof member 33 made of an elastic member such as rubber that seals the tip of the main body 31, and a cylindrical waterproof member 33 that fixes the waterproof member 33. fixing member 34 ₁ and center pin 32
an insulating first receiving pin holder 34 consisting of a cylindrical support member 34 ₂ that supports the center pin 32; and an insulating second receiving pin holder 35.

Here, the plug seat body 31 has a threaded portion 31a screwed together with the waterproof case 1 via a waterproof sealing material on the outer periphery of the rear end, and a connecting nut 22 of the plug 20 on the outer periphery of the front end.
a threaded portion 31b that is screwed together with the threaded portion 31b, and an inwardly protruding portion 31c that is bent in the direction of the central axis at the tip of the threaded portion 31b.
They each have The center pin 32 disposed in the connector seat body 31 has a rear end 32a protruding from the rear end of the connector seat body 11, and a receiving portion 32b having a slit for inserting the coaxial cable core at the tip end. On the other hand, near the rear end located inside the main body 31 of the fitting seat, there is a flange portion 32c having a circular cross section. A waterproof member 33 is pressurized from the rear end of the valve seat body 31 at its tip inside the valve seat body 31 . Waterproof member 33
has an inward protrusion 31 of the connector body 31 at its tip.
The tip 33a has a small diameter tip 33a that is in pressure contact with the inner protrusion 31c and protrudes toward the tip from the inward protrusion 31c.
A substantially conical guide recess 33b for guiding the coaxial cable 15 core wire 15a is formed on the distal end surface of the guide recess 33b, and a rear surface of the guide recess 33b projects rearward (leftward in FIG. 5). A protrusion 33c is provided. The first receiving pin holder 34 is press-fitted into the waterproof member 33 from its rear end.
The waterproof member 33 is press-fitted into the connector body 31.
A fixing member 34 ₁ to be fixed inside, and this fixing member 3
The support member 34 ₂ is fitted onto the outer periphery of the rear end of the pin 4 ₁ and supports the center pin 32 . Fixed member 3
4 ₁ is press-fitted from the rear end of the waterproof member 33, and presses the protruding portion 33c of the waterproof member 33 in the distal direction with its distal end surface 34 _1a , and inserts the core wire 15a into the guide recess 33b of the waterproof member 33. While closing the small hole provided, the tip portion 33a and the inward protrusion portion 31c
Then, the outer circumferential surface of the fixing member 34 ₁ presses the inner circumferential surface of the waterproof member 33 in a direction perpendicular to the axis, thereby bringing the outer circumferential surface of the waterproof member 33 into close contact with the inner circumferential surface of the stopper main body 31. let Here, a small hole 34 _1b for inserting the core wire 15a is provided approximately at the center of the distal end surface 34 _1a of the fixing member 34 1, and a small hole 34 _1b for inserting the core wire _15a is provided.
A small-diameter stepped portion 34 _1c is formed on the inner periphery of the tip of the center pin 32, and the tip of the receiving portion 32b of the center pin 32 is loosely fitted into this stepped portion 34 _1c with a gap that allows the receiving portion 32b to expand. This prevents the receiving portion 32b from shifting. The support member 34 ₂ fitted to the outer circumference of the rear end of the fixing member 34 ₁ has its outer circumferential surface fitted to the inner circumferential surface of the valve seat main body 31 , and the tip 33 a of the support member 34 2 fits into the outer circumference of the rear end of the fixing member 34 ₁ . While fixing the rear end surface, the center pin 3 is fixed on the inner circumferential surface of the support member 34 ₂ .
Support and fix 2. Further, the flange 32c of the center pin 32 is fitted into the second receiving pin holder 35 which is fitted into the rear end portion of the connector seat main body 31.
2 is supported and fixed.

To assemble the waterproof connector seat 30 configured as described above, for example, the waterproof member 33 and the first receiving pin holder 34 are inserted into the connector seat main body 31 from the rear end.
Then, the center pin 32 with the second receiving pin holder 35 previously fitted on the outer periphery of the flange 32c is inserted into the connector body 31, and the tip of the center pin 32 is inserted into the stepped part ₃₄ of the fixing member 341. In addition to being located within _1c ,
The second pin holder 35 may be fixed by caulking the rear end of the main body 31 inward.

In the case of the waterproof connector seat 30 shown in FIGS. 5 and 6, when the connector 20 is not connected to the waterproof connector seat 30, the distal end surface 34 _1a of the fixing member 34 ₁ extends beyond the protrusion of the waterproof member 33. The force F ₁ pressing the portion 33c and the force in the center direction that the vicinity of the tip portion 33a of this waterproof member 33 receives from the inwardly protruding portion 31c of the plug seat body 31.
Due to F ₂ , the vicinity of the bottom of the guide recess 33b in the waterproof member 33 is compressed in the central axis direction. Therefore, by inserting the core wire 15a, etc., the guide recess 3
Even if a small hole is made in 3b, this small hole is sealed. Further, since the outer circumferential surface of the waterproof member 33 and the inner circumferential surface of the valve seat main body 31 are brought into close contact with each other by the fixing member 34 ₁ , rainwater is prevented from entering into the valve seat main body 31 .

In addition, the connecting nut 22 of the connector 20 attached to the end of the coaxial cable 15 is screwed into the threaded portion 31b of the connector seat body 31, and the connector 20 is attached to the waterproof connector seat 30.
When connecting the core wire 15a to the guide recess 33b of the waterproof member 33, the core wire 15a passes through the waterproof member 33 and is fitted into the receiving portion 32b of the center pin 32, whereby the center pin 32 and the core wire 15a are connected to each other. , and the outer conductor of the coaxial cable 15 and the plug body 31 are connected to each other. Here, the core wire 15a is inserted into the guide recess 3.
When inserting the guide recess 3b, the bottom of the guide recess 33b is pressed and deformed backward, making it easier to insert the core wire 15a. Moreover, after the core wire 15a is inserted, the tip end surface 21a of the shell 21 in the connector 20 causes the tip end protrusion of the waterproof member 33 to exert a force F ₃
As a result, the bottom of the guide recess 33b is compressed in the direction of the central axis by forces F ₁ , F ₂ and F ₃ , thereby sealing the periphery of the core wire 15 a and preventing rainwater from entering. is prevented. When the core wire 15a is removed, the guide recess 33
The bottom of b is sealed.

Here, the waterproof member 3 in the waterproof connector seat 30
3 has a relatively high dielectric constant, so this waterproof member 33
The capacitance at the location where is placed increases,
Insertion loss may increase. However, in order to compensate for dielectric properties, the diameter of the center of the center pin 32 is made smaller than that of the conventional one, and the center pin 32 is
2 to the first and second receiving pin holders 34, 35.
By making the inside of the plug seat body 31 hollow by supporting it, the inductance at the center of the center pin 32 is increased and the capacitance is reduced, and the diameter of the flange 32c of the center pin 32 is also increased. By reducing the inductance and increasing the capacitance in this part, the increase in insertion loss due to the insertion of the waterproof member 33 as described above is suppressed, and the voltage standing wave ratio becomes smaller and approaches 1, resulting in impedance matching. becomes easier to take.

However, in the case of the waterproof type connector seat 30,
Since the first receiving pin holder 34 is press-fitted into the fitting body 31 to fix the prevention member 33,
When the waterproof member 33 is pressed inward by external pressure, the first receiving pin holder 34 moves inward. Particularly in an environment with severe temperature cycles, the movement of the first receiving pin holder 34 is significant. If the first receiving pin holder 34 moves inward in this manner, there is a problem in that the force F ₁ that presses the waterproof member 33 forward is lost, and the waterproof function deteriorates.

In order to solve this problem, for example, as shown by the two-dot chain line in FIG.
A method of fixing the receiving pin holder 34 is also considered. However, when the holding member 40 is provided, the inner diameter of the hollow part in the connector body 31 becomes smaller, which reduces the impedance, so in order to compensate for this, the diameter of the center pin 32 must be made smaller. No. However, it is difficult to make the center pin 32 thinner in terms of processing, and providing the holding member 40 is disadvantageous and inconvenient because it requires a holding member 40 of a different length each time the length of the plug seat body 31 changes. be.

[Purpose of invention]

The present invention has been made to solve the above problems, and provides a waterproof connector seat that can easily and accurately fix a waterproof member within the connector body without using a holding member or the like. The purpose is to provide

[Summary of the invention] In order to achieve the above object, the present invention uses a cylindrical conductive connector that protrudes from the outer wall of a waterproof case housing a public listening circuit and is removably connected to a connector attached to a coaxial cable. a stopper main body; a conductive center pin disposed approximately on the central axis within the stopper main body, the tip of which is removable from the core of the coaxial cable, and the rear end of which is connected to the common listening circuit; a waterproof member made of an elastic member that is housed in the main body of the stopper seat and seals the opening at its tip end; an insulating first receiving pin holder which is fixed to the tip opening of the body and supports the center pin on its inner peripheral surface; an insulating second supporting the central pin on its circumferential surface;
In the waterproof type connector seat equipped with a receiving pin holder, the cylindrical first receiving pin holder for fixing the waterproof member has a rear end expanded outward and a slit formed in order to provide spring properties; The present invention is characterized in that a recess is provided at a position on the inner circumferential surface of the plug seat body corresponding to this rear end, and the outer peripheral rear end of the first receiving pin holder is locked in the recess in a press-contact state.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a partially enlarged view showing the tip portion of the waterproof connector seat according to this embodiment. This waterproof type connector seat 130 is different from the one shown in FIG.
d, and the shape of the first receiving pin holder 134 is different, and this first receiving pin holder 134
The rear end portion of the annular recess 31d is engaged with the annular recess 31d. That is, the annular recess 31d is inclined at a predetermined angle θ toward the distal end of the plug seat body 31, so that the first receiving pin holder 134
facilitates engagement with the And waterproof member 33
The first receiving pin holder 134, which is press-fitted from the rear end into the waterproof member 33, has a cylindrical shape made of an insulating material, and a small hole 134b for inserting the core wire 15a is formed approximately at the center of the distal end surface 134a, which is press-fitted into the waterproof member 33. A large-diameter stepped portion 13 is provided inside the small hole 134b.
4c is formed, and the tip of the receiving portion 32b of the center pin 32 is loosely fitted into this stepped portion 134c with a gap that allows the receiving portion 32b to expand. This prevents the receiving portion 32b from shifting. moreover,
As shown in FIG. 2, the first receiving pin holder 134
The rear end 134d is the outer diameter of the tip and the plug seat body 31.
The rear end of the slit 134 is formed to be larger than the inner diameter of the slit 134.
e is provided to provide springiness in the direction perpendicular to the axis and engage within the annular recess 31d. In addition,
By forming a taper on the outer periphery of the tip of the first receiving pin holder 134, press-fitting into the waterproof member 33 becomes easy.

To assemble the waterproof connector seat 130 configured as described above, for example, after inserting the waterproof member 33 into the connector seat main body 31 from the rear end, the first receiving pin holder 134 is press-fitted. Then, the rear end 134d of the first receiving pin holder 134 is compressed in the central axis direction and moves toward the distal end inside the plug seat 31, and is fitted into the recess 31d of the plug seat main body 31. Then,
As in the conventional method, the center pin 32 is fitted with the second receiving pin holder 35 on the outer periphery of the flange 32c in advance.
into the connector body 31, and insert the tip of the center pin 32 into the stepped portion 134c of the first receiving pin holder 134.
the second receiving pin holder 35 by crimping the rear end of the plug seat main body 31 inward, etc.
Just fix it.

In this embodiment, the rear end 134d of the first receiving pin holder 134 is locked in the recess 31d of the plug seat main body 31, so rearward movement is prevented and the first receiving pin holder 134 is locked. Since the tip of the pin holder 134 presses the waterproof member 33 in the axial direction and the direction orthogonal to this, the waterproof member 33 pushes the stopper body 31
The opening at the tip can be firmly sealed.

FIG. 3 is a diagram for explaining a method of forming the annular recess 31d in the plug seat main body 31. Annular recess 3
1d, set the connector body 31 on a lathe, and move the cutting tool 140 toward the inner peripheral surface of the connector body 31 at a predetermined angle θ while rotating the connector body 31. For example, it is possible to form an annular recess 31d having a substantially right-angled triangular shape. Therefore, the typical two-step lathe process of inserting the cutting tool 140 along the central axis of the plug seat body 31 and then moving the cutting tool 140 back and forth to form the annular recess 31d can be reduced to one step. It has the advantage of being shortened.

[Effect of idea]

As explained above, according to the present invention, the rear end of the cylindrical first receiving pin holder is expanded outward, and a slit is formed in the rear end to give it spring properties. Since the rear end of the first receiving pin holder is held in pressure contact with the recess formed in the main body of the connector seat, movement of the first receiving pin holder can be prevented, thereby preventing the waterproof member from moving. can be firmly fixed to the opening at the tip of the body of the fitting body, and the sealing function can be fully demonstrated.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of the vicinity of the tip of a waterproof connector seat according to an embodiment of the present invention, FIG. 2 is a perspective view of the first receiving pin holder shown in FIG. 1, and FIG. 3 is a view similar to that shown in FIG. Figure 4 for explaining the method of forming the annular recess of
5 and 5 are cross-sectional views for explaining a conventional waterproof connector seat, and FIGS. 6 a to 6 f are cross-sectional views of each component in FIG. 5. 1...Waterproof case, 15...Coaxial cable, 1
5a... Core wire, 20... Junction, 30... Waterproof junction seat, 31... Junction seat body, 31a, 31b...
Threaded part, 31c... Inward protrusion, 31d... Annular recess, 32... Center pin, 32b... Receiving part, 32
c... Flange portion, 33... Waterproof member, 33a... Tip portion, 33b... Guide recess, 35... Second receiving pin holder, 130... Waterproof connector seat, 134... First receiving pin holder , 134b...Small hole, 134c
...Danbe, 134e...Slit.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical conductive connector body that protrudes from the outer wall of a waterproof case housing a public listening circuit and is removably connected to a connector attached to a coaxial cable, and this connector. a conductive center pin disposed approximately on the central axis within the seat body, a tip of which is removable from the core wire of the coaxial cable, and a rear end connected to the common listening circuit; a waterproof member made of an elastic member that seals a distal opening of the waterproof member; an insulating first receiving pin holder that supports the center pin on its inner peripheral surface;
A waterproof connector seat comprising: a second insulating receiving pin holder having a cylindrical shape and having an outer periphery fixed to the inner peripheral surface of the rear end of the connector seat body and supporting the center pin on the inner peripheral surface; The first receiving pin holder has a rear end portion formed with a slit in order to expand outward and provide spring properties, and a recessed portion at a position on the inner circumferential surface of the plug seat body corresponding to this rear end portion. A waterproof connector seat characterized in that a rear end of the outer periphery of the first receiving pin holder is locked in the recess.