JP2000106237A - Multipole coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multipole coaxial connector which is simple in constitution, easy to assemble, and low costs for manufacturing and replacing its parts. SOLUTION: A cable assembly 6 has a plate 7, and first conducting members 11 with the central conductor 8 of a coaxial cable 5 soldered thereto are arranged in the shape of a comb on the first plate surface of the plate 7. Second conducting members 12 for connection to an outer conductor 10 are arranged on the second plate surface of the plate 7. After the end of the cable assembly 6 has been inserted into an open space 3 formed between a cover housing 4 and a base housing 2 by opening the cover housing 4, the cover housing 4 is closed, and the end of the cable assembly 6 is clamped by the housings 2, 4. The first conducting members 11 are pressure contacted with a contact 16, and the second conducting members 12 are pressure contacted with a shell 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multipolar coaxial connector used for connecting, for example, a liquid crystal panel to a substrate via a cable.

[0002]

2. Description of the Related Art In recent years, liquid crystal panels in notebook personal computers have become larger, and accordingly, connectors for connecting the liquid crystal panel to a substrate via a cable have become multipolar. Also,
Due to the demand for high resolution with the enlargement of liquid crystal panels, the operating frequency of liquid crystal panels and peripheral components has been increasing,
For this reason, electromagnetic interference (EMI: electromag
The problem of netic interference) has become apparent.

In order to solve such a problem, it is conceivable to use a coaxial cable. For example, in the connector shown in FIG.
01 is mounted on the cable holder 202, the outer conductor (shield wire) is soldered to the ground bar 203, and the center conductor 204 is bent into a U-shape. Next, the cable holder 202 is inserted into the plug 205 having the shell 207. At this time, the center conductor 204 is sandwiched between the spring portions of the contacts (not shown) of the plug 205, and the coaxial cable 20
One center conductor 204 and the contact of the plug 205 are connected. The plug 205 into which the cable holder 202 is inserted as described above is fitted with a receptacle 206 having a shell 208 fixed to a substrate (not shown), thereby enabling electrical connection.

In some cases, the life of the liquid crystal panel is relatively short, and in such a case, the plug connected to the substrate via the flat coaxial cable 201 is diverted as it is, while the liquid crystal panel is fixed to this. Together with the existing receptacle 206.

[0005]

In the above connector,
Since three main parts, the cable holder 202, the plug 205, and the receptacle 206, are required, the number of parts is large, and the manufacturing cost is high, including the parts cost and the assembly cost. Furthermore, in this type of connector, loose contact pressure between contacts leads to poor signal transmission,
Although a lock mechanism that locks the connection state of the connector is required, a lock mechanism of a type that engages inside the shell or the housing (so-called inner lock type) has a problem that it is difficult to release the lock, for example, when replacing parts. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to provide a multipolar coaxial connector which can be easily assembled with a simple structure and whose manufacturing cost can be reduced. That is. A second object of the present invention is to provide a multi-pole coaxial connector that can be easily replaced.

[0007]

According to a first aspect of the present invention, there is provided an insulating base housing for holding a large number of side-by-side contacts. An insulating cover housing that forms an open space between the base housing and the base housing by rotating relative to the base housing, a conductive shell that covers each housing and is connected to each other in a closed state of both housings, A cable assembly that is removably inserted into the open space while holding an end of the multipolar coaxial cable, the cable assembly being sandwiched between the two housings with the end closed. In the closed state, the center conductor of each coaxial cable is connected directly or indirectly to the contacts held in the base housing, and each coaxial cable is connected. Of the outer conductor is characterized in that connected directly or indirectly to at least one of the shells.

In this aspect, when the end of the cable assembly is inserted into an open space formed by opening the cover housing and then the cover housing is closed, conduction between the center conductor and the contact and between the outer conductor and the shell are ensured. You. Since the configuration of the plug as shown in the prior art is omitted, the number of parts is small, and the manufacturing cost can be reduced by reducing the parts cost and the assembly cost.

Further, since the cable assembly is inserted into and removed from a sufficiently wide open space formed by opening the cover housing without applying a clamping force between the two housings,
The insertion / extraction force is light, and insertion / extraction can be performed very smoothly,
The ends of the cable assembly are not damaged during insertion or removal. In order to achieve the first object, according to a second aspect of the present invention, in the first aspect, an end portion of the cable assembly is arranged side by side with an insulating plate member and a plate surface of the plate member; A first conductive member connected to the central conductors of a large number of coaxial cables, and a second conductive member disposed on the plate surface of the plate material and connected to the external conductors of the large number of coaxial cables collectively; In the closed state of the cover housing, the first conductive member is pressed into contact with the corresponding counterpart contact, and the second conductive member is pressed into contact with one of the shells of the base housing and the cover housing. It is a feature.

In this aspect, when the cover housing is closed after the insertion of the cable assembly, the first conductive member disposed on the plate surface of the cable assembly is pressed by the contacts of the base housing to be connected, and the second conductive member is connected to the second housing. The conductive member is pressed and connected to the shell of one of the housings. The center conductor and the ground plate are not damaged during the mounting operation.

[0011] In order to achieve the first object, a third aspect is provided.
An aspect of the described invention is an insulating base housing that holds a large number of contacts arranged side by side, and an insulating cover housing that forms an open space between the base housing and a relative rotation with respect to the base housing. A conductive shell that covers each housing and is connected to each other in a closed state of the two housings, and is detachably inserted into a receiving portion of the open cover housing while holding an end of the multipolar coaxial cable. End,
A cable assembly which is clamped between the two housings in which the ends are closed.
A central conductor of each coaxial cable is directly or indirectly connected to a contact held by a base housing, and an outer conductor of each coaxial cable is directly or indirectly connected to at least one shell. is there.

In this aspect, after the cable assembly is inserted into and held in the receiving portion of the cover housing in the open state,
When the cover housing is closed, the center conductor of the coaxial cable is connected to the contacts of the base housing,
A ground plate is connected to the shell of one of the housings. The cover housing may be pivotable to the open position, or may be removable from the base housing.

Since the configuration of the component corresponding to the plug as shown in the prior art is omitted, the number of components is small, and the manufacturing cost can be reduced by reducing the component cost and the assembly cost. In addition, when the cable assembly is mounted on the cover housing in the open state, the cable assembly is mounted without applying a clamping force between the two housings. Are not damaged during the mounting operation.

[0014] In order to achieve the first object, a fourth aspect is provided.
According to an aspect of the invention described in claim 3, the end of the cable assembly includes a conductive ground plate that collectively connects outer conductors of a large number of coaxial cables arranged side by side,
In the closed state of the cover housing, the center conductor exposed on the distal end side of the coaxial cable with respect to the ground plate is pressed against the corresponding contact, and the ground plate is pressed against one of the shells of the base housing and the cover housing. It is characterized by being touched.

In this aspect, when the cover housing on which the cable assembly is mounted is closed, the center conductor is pressed and connected to the contact of the base housing, and the ground plate is pressed and connected to the shell of one of the housings. You. Since the end of the cable assembly is mounted without receiving the pressing force from the base housing side,
The center conductor and ground plate are not damaged during mounting.

According to another aspect of the present invention, the first object is achieved.
According to an aspect of the present invention, in claim 3 or 4, the end of the cable assembly is housed from the inner surface side into a concave portion formed on the inner surface of the cover housing in an open state. In this aspect, the cable assembly can be easily mounted by fitting the cable assembly into the concave portion on the inner surface of the open cover housing.

According to a sixth aspect of the present invention, the first object is achieved.
In the aspect of the invention described in claim 3 or 4, the end of the cable assembly is inserted from the center conductor side into an insertion hole formed from the front end to the base end of the cover housing, and the cable assembly is inserted. And the center conductor and the ground plate of the cable assembly are exposed on the inner surface of the cover housing.

In this embodiment, by inserting the cable assembly into the insertion hole of the opened cover housing,
The cable assembly can be easily mounted. In order to achieve the first object, an embodiment of the invention according to claim 7 is characterized in that, in claim 5 or 6, the holding means for holding the end of the cable assembly in the cover housing in the open state is provided. Is what you do.

In this embodiment, for example, when the connector is manufactured, it is possible to prevent the center conductor from being displaced from a normal position in a state where the cover housing is in the open state. As a result, a highly reliable connector can be realized. In order to achieve the first object, claim 8
According to an aspect of the invention described in any one of claims 3 to 7, the cover housing has a holding groove for holding a center conductor of the coaxial cable, and each center conductor is provided at a bottom of the corresponding holding groove. It is characterized by being soldered to independently formed metal films, and the holding means includes the metal films.

In this embodiment, since the respective center conductors of the coaxial cable are soldered to the metal coating on the inner surface of the corresponding holding groove, during manufacture of the present connector, the center housing is opened with the cover housing open. The conductor is not displaced from the holding groove. As a result, a highly reliable connector can be realized. As a method of forming a metal film on the bottom of the holding groove, for example, MID (Molded Inter
connection Device).

Here, the above-mentioned MID technology includes a two-shot method in addition to a one-shot method such as an exposure method and a laser method. For example, in the exposure method, after the cover housing is injection-molded, masking is applied to portions that do not require plating, and exposure processing is performed to create a portion that does not have plating. Produces a metal coating. The laser method is a method of exposing using a laser beam in the exposure method, and is preferably used in a multi-pole coaxial connector when exposing fine parts having a small arrangement pitch such as the bottom of the holding groove with high dimensional accuracy. Can be.

In the two-shot method, for example, two different types of resins are integrally molded in the manner of two-color molding using an insert. First, a portion corresponding to a pattern of two-color molding (for forming a metal film on the surface). (Part) is molded with a resin that can be plated with MID (primary molding). Next, after the remaining portion is molded by a resin that does not have MID plating by secondary molding, a plating process is performed,
A metal coating is deposited on the surface of the primary formed part to obtain an integrated structure including the metal coating.

[0023] In order to achieve the first object, a ninth aspect is provided.
According to an aspect of the present invention, in claim 7, the holding means includes a shell for covering the cover housing, and the shell is detachably mounted on the cover housing, and at least the ground plate is mounted on the cover housing. Is held. In this aspect, by attaching the shell after attaching the end of the cable assembly to the cover housing, the shell can also maintain electrical conduction with the ground plate while holding the ground plate of the cable assembly. .

In order to achieve the first object, a first aspect is provided.
According to an aspect of the present invention, a metal coating forming the shell is formed on a part of at least one surface of the base housing and the cover housing. It is. In this aspect, since the shell is formed in close contact with the housing, the dimensional accuracy of the shell is extremely improved. Further, the shell does not rattle against the housing.
As a method of forming a metal coating on the surface of the housing,
For example, there is a method of forming a MID (Molded Interconnection Device).

In order to achieve the second object, a first aspect is provided.
According to a first aspect of the present invention, there is provided the lock means according to any one of the first to tenth aspects, wherein the lock means engages the shells of the two housings with each other in a closed state and electrically connects the shells. And a lock release means for releasing the lock.

In this aspect, when the cable assembly is replaced, the lock releasing means can be easily operated from outside by operating the lock releasing means, so that the cover housing can be opened and the cable assembly can be easily pulled out at the time of replacement.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded sectional view of a main part of a multipolar coaxial connector according to a first embodiment of the present invention, and FIG. 2 is an assembled sectional view. Referring to FIGS. 1 and 2, base housing 2 mounted on surface 1a of substrate 1
And a cover housing 4 which is rotatably opened and closed in the base housing 2 and can form an open space 3 with the base housing 2, and a cable assembly 6 including a large number of coaxial cables 5 arranged side by side. I have.

The cable assembly 6 includes a coaxial cable 5
And an insulating plate 7 inserted and removed into an open space 3 formed between the housings 2 and 4 collectively. From the end of the coaxial cable 5, the exposed central conductor 8, the coating 9 of the central conductor 8, and the exposed outer conductor 10 are arranged in this order. 1 and 2 and FIG. 3 which is a plan view and a side view of the cable assembly 6.
Referring to (a) and (b), first plate surface 7a of plate 7
Are formed with first conductive members 11 connected to the center conductors 8 of the coaxial cables 5 and arranged in a side-by-side row. The first plate surface 7a of the plate member 7 has a rectangular shape at a distance from the first conductive member 11, and the second conductive member 12 of the second conductive member 12 for connecting the external conductors 10 collectively. One part 13 is arranged. The first portion 13 of the second conductive member 12 is connected to the second surface 7 of the plate 7 via a conductive member in a through hole 14 penetrating the plate 7.
It is connected to the second portion 15 of the second conductive member 12 formed substantially over the entire area b.

The above-described through-holes 14 may be provided at, for example, one or a plurality of locations so as to be continuous with a part of the first portion 13 of the second conductive member 12 having a rectangular shape. The first and second conductive members 11 and 12 are patterned on the first and second plate surfaces 7a and 7b of the plate member 7 by printing in the same manner as when a circuit is formed on a printed wiring board. ing. The connection between each first conductive member 11 and the corresponding center conductor 8 and the first conductive member 12
The connection between the portion 13 and each external conductor 10 is performed by soldering. For example, paste solder is applied to the surface of each first conductive member 11 in advance by the same principle as screen printing, and then the center conductor 8 of each coaxial cable 5 is placed on each paste solder. Soldering is performed by reflowing the paste solder.

Referring to FIGS. 1 and 2, the base housing 2 is made of an insulating member and holds a number of side-by-side contacts 16 connected to the first conductive member 11 of the cable assembly 6. Pitch P between contacts 16
[See FIG. 4B] is, for example, 0.4 to 0.5 mm. The contact 16 is formed in a fork shape by a fixing piece 17 and an elastic piece 18, and a rear end of the contact 16 is connected to a conductive member (not shown) on the surface 1a of the substrate 1 by soldering. An L-shaped lead 19 is formed. The fixing piece 17 has a wedge-shaped projection, and is inserted and fixed in the fixing hole 2 a of the base housing 2. The elastic piece 18 is accommodated and held in a guide groove 20 formed in a comb-like shape on the inner lower surface 2 b of the base housing 2. The distal end of the elastic piece 18 has a chevron 21 projecting toward the cover housing 4. The top of the chevron 21 constitutes a contact portion that elastically presses and contacts the first conductive member 11 of the cable assembly 6.

Referring to FIG. 1, FIG. 2 and FIGS. 4 (a) and 4 (b), the upper surface and both side surfaces of the base housing 2 are formed of a metal shell 2 made of sheet metal, for example, a copper alloy.
2 is covered. The shell 22 has a pair of reinforcements 23 extending in parallel forwardly on both sides, and the reinforcements 23 include a downwardly-opening channel material 24, which includes a web 25, an inner flange 26 and It has an outer flange 27. At the lower edge of the outer flange 27, a support plate 28 extending along the surface 1a of the substrate 1 is extended. The front end of the channel member 24 has the web 25 omitted, and both flanges 26 and 27 are exposed upward. Corresponding to the portion where the web 25 is omitted, the inner flange 26 is formed with, for example, a square-shaped engagement hole 29 for engaging an engagement protrusion 36 of a shell 34 described later that covers the cover housing 4. ing. Locking means is constituted by the engagement protrusion 36 and the engagement hole 29. The shells 22 and 34 are electrically connected to each other via an engagement portion between the engagement protrusion 36 and the engagement hole 29.

The cover housing 4 is made of an insulating material, and is supported rotatably about a rotation axis 30 (see FIG. 4A) by engaging with the base housing 2 at the base end. I have. With reference to FIGS. 1 and 2, the widthwise intermediate portion of the base end of the cover housing 4 has a curved stepped portion 33 that engages with the lower edge 32 of the inner back wall 31 of the base housing 2. This portion also serves to guide rotation.

Referring to FIG. 1, FIG. 2 and FIGS. 4 (a) and 4 (b), the upper surface and side surfaces, and the lower surface (inner surface) and part of the front surface of cover housing 4 are made of, for example, a sheet metal formed copper alloy. And the like. The shell 34 includes an upper plate portion 38 that covers the upper surface of the cover housing 4 and a pair of side plate portions 3 that respectively cover both side surfaces.
9, a pair of front plate portions 40 covering the front surface of the cover housing 4 except for the widthwise middle portion from the front edge of the upper plate portion 38, and the lower surface (inner surface) of the cover housing 4 from the lower edge of each front plate portion 40. ) And an elastic piece 40 extending substantially in parallel. The elastic piece portion 40 is formed in a gentle mountain shape that is convex downward, and elastically presses and contacts the second conductive member 12 of the cable assembly 6 when the cover housing 4 is closed.

Referring to FIGS. 4 (a) and 4 (b) and FIG. 5, an arm 35 is provided which extends in a U-shape from the rear ends of both side plates 39 of the shell 34 and extends forward. ,
The front end of the arm 35 has the base housing 2
As shown in FIG. 6, an engagement protrusion 36 to be fitted into the engagement hole 29 of the shell 22 is formed, for example, by cutting and raising. At the front end of each arm 35, an L-shaped unlocking operation section 37 extending outward is provided to provide an example of unlocking means. When the user pushes these unlocking operation sections 37 inward so as to sandwich them from both sides with fingers, the arm 35 bends around the base end 42 curved in a U-shape as a fulcrum and engages the engagement projections 36. It is designed to be detached from the hole 29.

In the present embodiment, as shown in FIG.
After inserting the cable assembly 6 into the opening 3 in the direction of the arrow in the figure, and closing the cover housing 4 as shown in FIG. 2, the first plate surface 7a of the cable assembly 6
The first conductive member 11 disposed on the base member 2 is pressed against and connected to the elastic piece 18 of the contact 16 of the base housing 2. Thereby, the center conductor 8 of each coaxial cable 5 is connected to the corresponding contact 16. Further, the second conductive member 12 is pressed and connected to the elastic piece 41 of the shell 34 of the cover housing 4 so that the outer conductor 10 of each coaxial cable 5 is connected to the shell 2 of the housing 2, 4.
2, 34.

Further, since the cable assembly 6 is inserted into and removed from the sufficiently wide opening 3 formed by opening the cover housing 4 without applying a clamping force between the two housings 2 and 4, the insertion and removal force is light. Insertion and removal can be performed very smoothly, and the conductive members 11 and
12 is not damaged at the time of insertion and removal. At the same time as the cover housing 4 is closed, the two housings 2, 4
The metal shells 22 and 34 are directly engaged with each other to lock the connection between the two housings 2 and 4, so that the locking is reliable. Since the lock is achieved by the engagement between the metal members, it is possible to give the user a secure feeling of achieving the lock. Since the two shells 22 and 34 are electrically connected to each other via the locking means, the structure can be simplified as compared with a case where the means for connecting the two shells 22 and 34 is separately configured. In addition, since the lock release operation portion 37 that can be operated from the outside is provided, the cover housing 4 can be easily opened when necessary, and the cable assembly 6 can be pulled out.

Further, since the configuration of the plug as shown in the prior art is omitted, the number of parts is small, and the manufacturing cost can be reduced by reducing the parts cost and the assembly cost. Next, a multi-pole coaxial connector according to a second embodiment of the present invention will be described with reference to FIGS. The main feature of the second embodiment is that, as shown in FIG. 7, the end of the cable assembly 43 is previously placed on the inner surface (lower surface) of the cover housing 49 which is opened by being rotated relative to the base housing 48. The connector is set, and then the cover housing 49 is closed to achieve a connected state of the connector.

When the cover housing 49 is closed,
An engagement protrusion 51 cut and raised so as to protrude outward from a metal shell 50 covering the base housing 48 forms a hook-shaped stay-like engagement formed on the metal shell 52 covering the cover housing 49. The projection 5 is engaged with the shell 5.
0 and 52 are locked with each other, and conduction between them is ensured. Locking means is constituted by both engagement projections 51 and 53.

In FIG. 7, reference numerals 81 and 82 denote elastic locking pieces which are pressed inward by the shell 52. Elastic locking piece 8
1 is a ground plate 44 of the cable assembly 43 which will be described later.
To secure the electrical connection between the ground plate 44 and the shell 52 (see FIG. 12). The elastic locking piece 82 locks the shell 52 itself to the cover housing 49. A support hook 83 is used to rotatably support the cover housing 49. Further, a tongue piece 84 having a semicircular cross section provided on the shell 52 is received by a roll-shaped receiving piece 85 provided on the shell 50. The shells 50 and 52 also guide relative rotation of each other. Plays the function of Further, the electrical contact between the tongue piece 84 and the receiving piece 85 is ensured by the contact.

Referring to FIGS. 8 (a) and 8 (b) which show the plane and side surfaces of the cable assembly 43, respectively, the cable assembly 43 connects the outer conductors 10 of a large number of coaxial cables 5 arranged side by side. And a holding sheet 45 made of, for example, insulating tape for holding the exposed end portions of the central conductors 8 of the coaxial cables 5 at once. ing. The ground plate 44 is formed by combining a pair of split plates 46, 46 that sandwich the outer conductor 10 of the coaxial cable 5. The fitting projection formed on the mating surface of one of the divided bodies 46 is press-fitted into the fitting concave portion formed on the mating surface of the other divided body 46, thereby being connected to each other to form the ground plate 44. . On the mating surface of each divided body 45,
A groove having a semicircular cross section is provided, and the external conductor 10 is inserted into a receiving hole 47 having a circular cross section formed by combining these grooves.
Are housed in a press-contact state, and conduction between the ground plate 44 and the external conductor is ensured.

9 (a) and 9 (b) showing the plane and front of the base housing 48. The base housing 48 is made of an insulating material and is connected to the center conductor 8 of each coaxial cable 5 of the cable assembly 43. A large number of contacts 54 and 55 are held. X in FIG. 9A
10 (a) and 9 (a), which are cross-sectional views along X-rays.
Referring to FIG. 10B, which is a cross-sectional view taken along line YY of FIG. 10, one contact 54 has a short fixed piece 56 disposed above and a long elastic piece disposed below. An L-shaped lead portion 58 that is soldered to a conductive member on the surface of the substrate and that clamps the rear lower edge of the base housing 58 is formed below the rear end of the contact 54 at the lower end of the contact 54. Is formed. The elastic piece portion 57 is partially accommodated in a guide groove 60 formed on the inner lower wall 59 of the base housing 48 and extending to a middle part in the depth direction,
Is held. The elastic piece portion 57 is formed in a chevron shape, and the top is pressed and contacted with the center conductor 8 of the coaxial cable 5. The fixing piece 56 is inserted from the rear into the fixing hole 61 in the upper part of the base housing 48 and is fixed.

The other contact 55 is formed in a fork shape by a long fixed piece 62 arranged below and a short elastic piece 63 arranged above. The front end of the fixing piece 62 is soldered to a conductive member on the surface of the substrate and has a front end edge of the base housing 58 sandwiched therebetween.
A character-shaped lead portion 64 is formed. Fixed piece 6
2 is formed on the inner lower surface 59 of the base housing 48 and partially accommodated and held in a guide groove 65 reaching the front end of the base housing 48. A rear end of the fixing piece 62 is provided with a fixing hole 66 formed in a lower portion of the base housing 48.
Is inserted and fixed from the front.

The shell 50 is made of, for example, a sheet metal formed copper alloy or the like, and covers the upper surface and side surfaces of the base housing 48. In the front half 68 of the side plate 67 of the shell 50,
The above-mentioned engagement projection 51 is provided. The front half 68 of the side plate portion 67 faces the concave portion on the side surface of the base housing 48, and a gap is provided between the side plate portion 67 and the base housing 48. As a result, the first half 6 of the pair of side plate portions 67
8 can be elastically deformed inward each other. Therefore, the front half 68 of the pair of side plate portions 67 is sandwiched between the fingers and pressed from both sides, so that the cover housing 49 is pressed.
The engagement of the engagement projections 51 engaged with the engagement projections 53 of the shell 52 is released, so that the lock can be easily released. The unlocking means is constituted by the front half 68 of the side plate 67.

11 (a) and 11 (b) showing the upper and front surfaces of the cover housing 49, respectively, and FIG. 12 showing the lower surface (inner surface) of the cover housing 49 with the cable assembly 43 attached. The housing 49 is made of an insulating material, and the upper surface and side surfaces in the closed state, and a part of the lower surface are covered with the shell 52 described above. The shell 52 includes an upper plate portion 75 covering the upper surface (outer surface) of the cover housing 49, side plate portions 76 covering both side surfaces of the cover housing 49, and a part of the lower surface of the cover housing 49 extending from each side plate portion 76. A pair of lower plate parts 7 to cover
7 is provided. The above-mentioned engagement projection 53 is provided on each side plate portion 7
6, a first portion 78 extending laterally;
A second portion 79 is provided following the first portion 78 and extending in parallel with the side plate portion 76 of the shell 52 (see FIG. 16). Between the first portion 79 and the side plate portion 76, the front half 68 of the side plate 67 of the shell 50 on the base housing 48 side.
A sufficient gap S for letting in and out is formed.

Referring to FIGS. 11B, 12 and 13, on the lower surface 69 of the cover housing 49 (the lower surface in the closed state), the holding sheet 45 of the cable assembly 43 is moved forward (toward the base end). ), The sheet holding holes 70 opened forward to accommodate and hold the respective center conductors 8 exposed.
And a central conductor holding groove 71 arranged in a comb shape and opened downward (inside surface) to accommodate and hold the cover 9 from below (inside surface). A cover holding recess 72 that opens downward, a ground plate holding recess 73 that opens downward to house and hold the ground plate 44 from below, and an outer shell of each coaxial cable 5 that is housed and held from below. And a cable holding recess 74 that opens downward from the base end in this order.

Next, the procedure for assembling the connector will be described with reference to FIGS. The cover housing 49 is opened and the shell 5 is opened as shown in FIG.
With the 2 removed, first, the corresponding center conductor 8 of the coaxial cable 5 is fitted into each of the center conductor holding grooves 71 arranged in a comb shape, and then the holding sheet 45 is introduced into the sheet holding hole 70. , The covering portion 9, the ground plate 44, and the outer periphery of the coaxial cable 5, respectively.
4 (see FIG. 14). At this time, as described above, the ground plate 44 comes into contact with the elastic locking piece 81, and the ground plate 44 and the shell 52 are conducted.

Next, as shown in FIGS. 14 and 15,
The shell 52 is put on the cover housing 49 while sliding from the front end side of the cover housing 49. Shell 5
When the cover 2 is completely covered, the above-mentioned elastic locking pieces 82 engage with the corresponding recesses formed in the cover housing 49, and the shell 52 is locked to the cover housing 49. Thus, the mounting of the cable assembly 43 and the shell 52 is completed.

Next, when the cover housing 49 is closed, as shown in FIGS. 17A and 17B, the center conductor 8 of each coaxial cable 5 is brought into contact with the corresponding contact 54, 55.
Are directly pressed into contact with the elastic pieces 57, 63, thereby ensuring electrical continuity and enabling signal transmission. When removing the cable assembly 43, the cable assembly 43 can be easily removed in the reverse order of the operation described above.

According to the second embodiment, after the end of the cable assembly 43 is set in the open cover housing 49 and the cover housing 49 is closed, the center conductor 8 of the coaxial cable 5 is connected to the base. The contacts 44 and 45 of the housing 48 are pressed into contact. At the time of replacement, the engagement between the engagement projections 51 and 53 as locking means can be easily released from the outside, so that the cable assembly 43 can be easily inserted and removed.

In particular, since the cable assembly 43 is mounted in a state where the cover housing 49 is opened and the holding force is not exerted between the two housings 48, 49, the mounting force is light and the mounting can be performed very smoothly. The conductor 8 and the ground plate 44 are not damaged during the mounting operation. In addition, since the configuration of the conventional plug is omitted, the number of parts is small, so that the manufacturing cost can be reduced by reducing the parts cost and the assembly cost.

When the cable assembly 43 is set in the cover housing 49, the ends of the center conductors 8 are held together by a simple holding sheet 45 made of tape, so that the center conductors 8 are separated. It can be accommodated in the corresponding center conductor holding groove 71 in an aligned state. In the second embodiment, FIGS.
5, the end of the cable assembly 43 is attached to the cover housing 49 with the cover housing 49 attached to the base housing 48.
Alternatively, the end of the cable assembly 43 may be attached to the cover housing 49 completely removed from the base housing 48 as in the third embodiment shown in FIG. In this case, the mounting work of the cable assembly 43 is very easy, and after the mounting and the shell 52 are mounted, the cable assembly 43 is mounted.
It can be handled integrally as a cover housing 48 with attached, and it is easy to handle.

Next, FIGS. 19 to 22 show a fourth embodiment of the present invention. Referring to these figures, the following is the main difference between the fourth embodiment and the second embodiment shown in FIGS. 7 to 17. That is, in the second embodiment, the shell 52 made of a metal plate is used.
In the fourth embodiment, the shell 50A of the cover housing 49A is formed of a conductive metal film 120 formed on a part of the surface of the cover housing 49A by using, for example, MID (Molded Interconnection Device) technology. .

In the second embodiment, the shell 52
Although the ground plate 44 of the cable assembly 43 is held by the cover housing 49 by the above, in the fourth embodiment, the central conductor holding groove 7 of the cover housing 49A is provided.
At the bottom of 1A, for example, MID (Molded Interconnection D)
evice) A conductive metal film 12 formed using a technique
4, each center conductor 8 of the cable assembly 43 is held by soldering.

In FIGS. 19A and 19B, which are a plan view and a front view of the cover housing 49A, and FIG. 20, which is a bottom view of the cover housing 49A, a hatched portion is a shell 50A. FIG. 21 (a)
19A corresponds to a cross-sectional view taken along line XX of FIG. Referring to these drawings, shell 50A includes upper surface portion 121 covering the entire upper surface of cover housing 49A, and lower surface portion 12 covering the front portion of the inner surface (lower surface) of cover housing 49A.
2 and a front part 123 connected between the upper part 121 and the lower part 122. The lower surface portion 122 covers substantially the entire area of the ground plate holding recess 73A.

Further, the bottom 125 of the center conductor holding groove 71A is formed.
21A, a conductive metal film 124 is formed as shown in FIG. 21A and FIG. 22A which is a cross-sectional view taken along line YY in FIG. 21A. b) and FIG.
As shown in FIG. 22B, which is a cross-sectional view taken along the line ZZ of FIG. 22B, each center conductor 8 of the cable assembly 43 is fixed to the metal coating 124 on the bottom 125 of the center conductor holding groove 71A by soldering. Have been. In addition, about the structure similar to 2nd Embodiment, the reference code A is added and shown at the end of the same code | symbol.

In this embodiment, since each center conductor 8 of the coaxial cable 5 is soldered to the metal film 124 on the bottom 125 of the corresponding center conductor holding groove 71A, the cover housing 49A is opened during the manufacture of this connector. In the completed working state, the center conductor 8 does not shift from the center conductor holding groove 71A. As a result, a highly reliable connector can be realized.

The MID technique as a technique for forming the metal films 120 and 124 includes a two-shot method in addition to a one-shot method such as an exposure method and a laser method. Since the arrangement pitch of 71A is very fine, for example, 0.4 to 0.5 mm, the laser method is suitable. In the laser method, for example, a cover housing 49A made of, for example, a conductive resin is injection-molded, then masking is performed on a portion that does not require plating, and exposure is performed using a laser beam to create a portion without plating. Except for the portions, metal films 120 and 124 made of a plating film are generated in a plating process. In the exposure process,
The laser beam scans along each center conductor holding groove 71A, so that a fine portion with a fine arrangement pitch can be exposed with high dimensional accuracy. At this time, the laser light is emitted from the lower surface side of the cover housing 49A.

It is of course possible to use an exposure method or a two-shot method instead of the laser method. Alternatively, the shell may be formed of a metal plate, and the metal coating 124 may be formed only on the bottom of the center conductor holding groove 71A. Further, in the above-described fourth embodiment, the laser light is emitted from the lower surface side of the cover housing 49A. However, the present invention is not limited to this. Irradiation along the direction is also possible. However, in this case, as shown in FIG. 23 as the fifth embodiment, the bottom 126 of the center conductor holding groove 71A is located on the front side (or the rear side) where the laser beam L is irradiated.
It is necessary to be inclined so that it becomes an open surface toward. In this case, since the bottom 125 can be exposed without scanning with a laser beam, the exposure processing can be performed with higher dimensional accuracy.

Next, referring to FIGS. 24 to 29,
A multi-pole coaxial connector according to a sixth embodiment of the present invention will be described. The sixth embodiment is mainly different from the second embodiment in the following 1) and 2). That is, 1) in the cable assembly 43 of the second embodiment, the holding sheet 45 holding the distal end of the coaxial cable 5
However, the difference is that the cable assembly 86 according to the third embodiment is abolished. Therefore,
In the cable assembly 86 according to the third embodiment, the exposed central conductor 8 of each coaxial cable 5 is free as shown in FIG. 2) FIGS. 28 (a) and (b)
As shown in FIG. 7, the cover housing 87 is made detachable with respect to the base housing 88, and the end of the cable assembly 86 is inserted into and set in an insertion hole 89 opened at the distal end of the cover housing 87 in a detached state. The cover housing 87 is mounted on the base housing 88. The insertion hole 89 is provided for the cable assembly 86.
The ground plate housing portion 118 for housing and holding the ground plate 44, and the central conductor 8 of each coaxial cable 5
And a central conductor holding portion 119 for accommodating and holding each. The center conductor holding portion 119 is arranged in a comb shape, and is opened downward except for the inner part. Center conductor 8
Reaches the far end. In addition, the contact 90 (91) on the base housing 88 side penetrates into the center conductor holding portion 119 from below through the above-described downwardly opened portion, and comes into direct contact with the center conductor 8 elastically. The center conductor holding portion 119 forms a center conductor holding groove corresponding to the above-mentioned downwardly opened portion.

Referring to FIGS. 25 (a) and 25 (b) showing a plane and a front view of the combined state of the two housings 87, 88, FIG.
First, the base housing 88 is made of an insulating member and holds a large number of contacts 90 and 91 side by side. FIG. 26A is a cross-sectional view taken along line XX of FIG.
, The rear half of one contact 90 has a fork shape with a lower fixing piece 92 and an upper elastic piece 93, and an inverted T-shape is formed on the front lower end of the contact 90. A lead portion 94 is formed. The fixing piece 92
It is inserted and fixed from the front of the base housing 88 into a fixing hole 96 formed in an intermediate portion of the lower wall 95 of the base housing 88. Except for a part including the top of the elastic piece part 93, the contact 90 has the remaining part held by the guide grooves 101 formed on the upper surface of the lower wall 95 of the base housing 88 and arranged in a comb shape.

Referring to FIG. 26B, which is a cross-sectional view taken along line YY of FIG. 25A, the other contact 91 is
A fixed main body 98 inserted from the rear into and fixed to a fixing hole 97 formed in a rear portion of the base housing 88, and a substantially T-shaped elastic piece extending obliquely upward from the front lower end to the front from the fixed main body 98. 99 and an L-shaped lead 100 formed at the lower rear end of the fixed main body 98. The remaining portion of the elastic piece portion 99 except the top portion is held by a guide groove 102 formed on the upper surface of the lower wall 95 of the base housing 88.

The top and side surfaces of the base housing 88 are covered by a metal shell 103. Shell 10
Reference numeral 3 denotes an upper plate portion which has a substantially U-shape in plan view as shown in FIG.
15 are provided. Extending portions 116 extend forward from both sides of the upper plate portion 115. A side plate portion 104 extending downward from the outer edge of each extension portion 116 extends.

Each of the side plate portions 104 protrudes laterally, and engages with an engagement recess 1 of a shell 107 of a cover housing 87 described later.
An elastically deformable engagement projection 105 that engages with the projection 14 is provided. The lower end edge of the side plate portion 104 is provided with an engagement protrusion 1.
There is provided a leg 106 extending in parallel to the surface of the substrate below the substrate 05. The front end 117 of each extension 116 is a free end, and the extension 116 and the side plate 104 are elastically deformed by pinching the front end 117 with fingers from both sides and pushing inward. Engaging recess 114 of mating projection 105
Is disengaged. That is, the front end 117 of the extension 116 constitutes the lock release means.

The top and side surfaces of the cover housing 87 are covered by a metal shell 107. Shell 10
7 includes an upper plate 108 that covers the upper surface of the cover housing 87. On both sides of the front end of the upper plate 108, front plate portions 109 extending along the front surface of the cover housing 87 are extended.
And the lower plate part 110 are connected.

The upper plate 108 is formed adjacent to each front plate 109 with an elastic tongue 111 whose periphery is cut out in a U-shape. These elastic tongues 111 have a mountain shape projecting into the insertion hole 89 of the cover housing 87. As shown in FIGS. 28A and 28B, the elastic tongue piece 111 connects the ground plate 44 of the cable assembly 86 inserted into the insertion hole 89 to the shell 107.
And serves to elastically press the ground plate 44 toward the lower plate 110 side. Thus, electrical continuity between the ground plate 44 and the shell 107 is ensured.

The upper plate portion 108 of the shell 107 has a pair of extending portions 112 extending to both sides.
A side plate portion 113 extending downward is provided at the outer edge of the base plate. When the cover housing 87 is closed, the side plate portions 113 of the side plate portion 1 of the shell 103 on the side of the base housing 88 are provided as shown in FIGS. 25A and 25B and FIG.
04, and the above-mentioned engagement protrusion 105 is attached to the side plate portion 11.
3 is engaged with the engaging concave portion 114 formed in the groove 3. By the engagement between the engagement protrusion 105 and the engagement recess 114, electrical continuity between the two shells 103 and 107 is ensured.

According to the present embodiment, as shown in FIG. 28A, the cable assembly 86 is inserted into the insertion hole 89 of the cover housing 87 removed from the base housing 88.
And insert each central conductor 8 into the central conductor holding portion 119.
And the ground plate 44 is housed in the ground plate housing part 118. Next, after the cover housing 87 is mounted diagonally on the base housing 88 side, the cover housing 8
7 is closed, as shown in FIGS. 29 (a) and (b),
Each center conductor 8 is pressed into contact with the corresponding contact 90, 91. In addition, the shell 10 of both housings 87, 88
The engagement between the shells 103 and 107 is achieved by the engagement between the engagement projections 105 and the engagement recesses 114, whereby locking is achieved and electrical continuity between the shells 103 and 107 is ensured.

Also in the sixth embodiment, the lock can be easily released from the outside by operating the front end 117 of the extending portion 116 of the shell 103 at the time of replacement, so that the cable assembly 86 can be easily inserted and removed. . In particular, since the cable assembly 86 is inserted and removed with no holding force between the two housings 87 and 88, the insertion and removal force is light and the insertion and removal is very smooth, and the center conductor 8 and the ground plate 44 are damaged at the time of insertion and removal. Nothing to do. Since the number of parts is small, manufacturing costs can be reduced through reduction of parts costs and assembly costs.

It should be noted that the present invention is not limited to the above embodiments, and the holding sheet 45 can be omitted in the second, third, fourth and fifth embodiments. In the sixth embodiment, a metal film is formed on the bottom of the groove opened downward in the center conductor holding portion 119 by the MID technique, and the center conductor 8 is formed on the metal film.
May be held by soldering. In each embodiment, at least one of the shells of the base housing and the cover housing can be made of a metal coating using MID technology. In addition, various changes can be made within the scope of the present invention.

[0070]

According to the first aspect of the present invention, the construction of the plug as shown in the prior art is omitted, so that the number of parts is small, and the manufacturing cost can be reduced by reducing the parts cost and the assembly cost. In addition, since the cable assembly is inserted and removed in a sufficiently wide open space formed by opening the cover housing without applying a clamping force between the two housings, the insertion and removal force is light and the insertion and removal can be performed very smoothly. Also, the end of the cable assembly is not damaged during insertion and removal.

According to the second aspect of the present invention, when the cover housing is closed after the insertion of the cable assembly, the first conductive member disposed on the plate surface of the cable assembly is pressed by the contact of the base housing to be connected. The second conductive member is pressed and connected to the shell of one of the housings. The center conductor and the ground plate are not damaged during the mounting operation.

According to the third aspect of the present invention, since the configuration of the component corresponding to the plug as shown in the prior art is omitted, the number of components is small, and the manufacturing cost can be reduced by reducing the component cost and the assembly cost. In addition, when the cable assembly is mounted on the cover housing in the open state, the cable assembly is mounted without applying a clamping force between the two housings. Are not damaged during the mounting operation.

According to the fourth aspect of the present invention, when the cover housing on which the cable assembly is mounted is closed, the center conductor is pressed and connected to the contact of the base housing, and the ground plate is pressed against the shell of one of the housings. Connected. Since the end of the cable assembly is mounted without receiving the pressing force from the base housing side, the center conductor and the ground plate are not damaged at the time of mounting.

According to the fifth aspect of the present invention, the cable assembly can be easily mounted by fitting the end of the cable assembly into the concave portion of the inner surface of the open cover housing from the inner surface side. According to the sixth aspect of the present invention, the cable assembly can be easily mounted by inserting the cable assembly into the opened insertion hole of the cover housing.

According to the seventh aspect of the present invention, when the present connector is manufactured, it is possible to suppress, for example, the center conductor from being displaced from a normal position in a state where the cover housing is in an open state. As a result, a highly reliable connector can be realized. In the invention according to claim 8, since each center conductor of the coaxial cable is soldered to a metal film formed on the bottom of the corresponding holding groove by using, for example, the MID technique, the cover is not required when the connector is manufactured. The center conductor is not displaced from the holding groove when the housing is in the open state. As a result, a highly reliable connector can be realized.

According to the ninth aspect of the present invention, when the shell is mounted after the end of the cable assembly is mounted on the cover housing, the shell holds the ground plate of the cable assembly and also establishes electrical conduction with the ground plate. Can be secured. During the manufacture of this connector,
In the state where the cover housing is in the open state, for example, the displacement of the center conductor can be prevented, so that a highly reliable connector can be realized.

According to the tenth aspect, for example, the MID
The dimensional accuracy of the shell is greatly improved because the shell is formed integrally and in close contact with the housing using a technique. According to the eleventh aspect of the present invention, when the cable assembly is replaced, the lock releasing means can be operated to easily release the locking means from the outside, so that the cover housing can be opened and the cable assembly can be easily removed at the time of replacement.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of a multipolar coaxial connector according to a first embodiment of the present invention.

FIG. 2 is an assembled sectional view of the multipolar coaxial connector according to the first embodiment.

FIGS. 3A and 3B are a plan view and a side view of the cable assembly according to the first embodiment, respectively.

FIGS. 4A and 4B are a plan view and a front view, respectively, of the multipolar coaxial connector in a state where a cable assembly is not mounted in the first embodiment.

FIG. 5 is a schematic perspective view showing a state immediately before the shells are connected to each other in the first embodiment.

FIG. 6 is a side view of the multipolar coaxial connector showing a state where the shells are connected to each other in the first embodiment.

FIG. 7 is a side view of the multipolar coaxial connector according to the second embodiment of the present invention, showing a state where a cover housing is opened.

FIGS. 8A and 8B are a plan view and a side view, respectively, of a cable assembly according to a second embodiment.

FIGS. 9A and 9B are a plan view and a front view of a base housing according to a second embodiment, respectively.

10 (a) and (b) respectively show X in FIG. 9 (a).
It is sectional drawing which follows the -X line and sectional drawing which follows the YY line.

FIGS. 11A and 11B are a plan view and a front view of a cover housing according to a second embodiment, respectively.

FIG. 12 is a bottom view of the cover housing in a state where the cable assembly according to the second embodiment is mounted.

FIG. 13 is a partially cutaway side view of the multipolar coaxial connector showing a step of attaching the cable assembly of the second embodiment to a cover housing.

FIG. 14 is a partially cutaway side view of the multipolar coaxial connector showing a step of attaching a shell to the cover housing according to the second embodiment.

FIG. 15 is a partially cutaway side view of the multipolar coaxial connector showing a state where the shell is completely mounted on the cover housing according to the second embodiment.

FIG. 16 is an essential part perspective view showing a portion where shells are engaged with each other in the second embodiment.

FIGS. 17 (a) and (b) are cross-sectional views of a multi-pole coaxial connector showing a state in which a cover housing is closed in a second embodiment corresponding to each contact.

FIG. 18 is a schematic cross-sectional view showing a step of attaching an end of a cable assembly to a cover housing according to a third embodiment as a modification of the second embodiment.

FIGS. 19A and 19B are a plan view and a front view of a cover housing according to a fourth embodiment, respectively.

FIG. 20 is a bottom view of the cover housing according to the fourth embodiment.

21A is a cross-sectional view taken along line XX of FIG. 19A, and FIG. 21B is a cross-sectional view of the cover housing showing a state where the end of the cable assembly is mounted on the cover housing. is there.

22A is a sectional view taken along line YY of FIG. 21A, and FIG. 22B is a sectional view taken along line ZZ of FIG. 21B.

FIG. 23 is a schematic cross-sectional view of the cover housing showing a step of exposing the bottom of the center conductor holding groove of the cover housing of the cover housing with laser light according to a fifth embodiment as a modification of the fourth embodiment.

FIGS. 24A and 24B are a plan view and a side view of a cable assembly according to a sixth embodiment, respectively.

FIG. 25 is a plan view and a front view of a multipolar coaxial connector in a state where a cable assembly is not mounted in the sixth embodiment.

26A and 26B are a cross-sectional view taken along line XX and a cross-sectional view taken along line YY of FIGS. 25A and 25B, respectively.

FIG. 27 is a side view of the multipolar coaxial connector showing a state where the shells are engaged with each other in the sixth embodiment.

FIG. 28A is a partially exploded side view showing a step of attaching an end of a cable assembly to a cover housing in the sixth embodiment, and FIG. 28B is an attached view of an end of the cable assembly. FIG. 6 is a partially exploded perspective view showing a step of mounting the cover housing on the base housing.

FIGS. 29 (a) and (b) are cross-sectional views of a multi-pole coaxial connector showing a state in which a cover housing is closed in a sixth embodiment corresponding to each contact.

FIG. 30 is a schematic exploded perspective view of a conventional multipolar coaxial connector.

[Explanation of symbols]

 2 Base housing 3 Opening part 4 Cover housing 5 Coaxial cable 6 Cable assembly 7 Plate 8 Center conductor 9 Covering part 10 Outer conductor 11 First conductive member 12 Second conductive member 16 Contact 22 Shell 29 Engagement hole (lock) Means) 34 Shell 36 Engagement protrusion (lock means) 37 Release operation part (lock release means) 43 Cable assembly 44 Ground plate 45 Holding sheet 48 Base housing 49, 49A Cover housing 50 Shell 51, 53 Engagement protrusion (Lock means) 52, 52A Shell 54, 55 Contact 68 Front half (unlocking means) 70, 70A Sheet holding hole 71, 71A Central conductor holding groove 72, 72A Covering holding recess 73, 73A Ground plate holding recess 74, 74A Cable holding recess 81 , 82 bullets Engagement piece 86 Cable assembly 87 Cover housing 88 Base housing 89 Insertion hole 90, 91 Contact 103 Shell 105 Engagement projection 107 Shell 114 Engagement concave part 116 Extension part 117 Front end (lock release means) 118 Ground plate accommodation part 119 Center Conductor holder 120, 124 Metal coating 125, 126 Bottom

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E023 AA01 AA04 AA16 AA18 BB04 BB16 BB22 DD03 DD06 DD18 DD19 DD25 DD28 EE10 EE12 GG02 GG03 GG04 GG09 GG11 HH01 HH05 HH08 HH12 HH17 HH18 HH28

Claims (11)

[Claims] An insulating base housing for holding a large number of contacts arranged side by side; an insulating cover housing for forming an open space between the base housing and the base housing by rotating relative to the base housing; A conductive shell that covers each housing and is connected to each other when both housings are closed; and an end that is detachably inserted into the open space while holding an end of the multipolar coaxial cable. A cable assembly sandwiched between the two housings, each having a closed end, wherein the central conductor of each coaxial cable is directly or indirectly connected to a contact held by the base housing when the two housings are closed. A multi-pole coaxial connector, wherein an outer conductor of the coaxial cable is directly or indirectly connected to at least one shell. Kuta. 2. An end portion of the cable assembly, an insulating plate member, a first conductive member arranged side by side on the plate surface of the plate member, and connected to a central conductor of a large number of coaxial cables, and a plate member. A second conductive member arranged on the plate surface of the plurality of coaxial cables and connecting the outer conductors of a large number of coaxial cables at once, wherein the first conductive member contacts a corresponding contact of the corresponding partner when the cover housing is closed. 2. The multipolar coaxial connector according to claim 1, wherein the second conductive member is pressed and contacted with one of the shells of the base housing and the cover housing. 3. An insulating base housing for holding a large number of contacts arranged side by side; an insulating cover housing for forming an open space between the base housing and the base housing by rotating relative to the base housing; A conductive shell that covers each housing and is connected to each other when both housings are closed, and an end that is removably inserted into the receiving portion of the open cover housing while holding the end of the multipolar coaxial cable. A cable assembly sandwiched between the two housings, the ends of which are closed. When the two housings are closed, the center conductor of each coaxial cable is directly or indirectly connected to a contact held by the base housing. And that the outer conductor of each coaxial cable is directly or indirectly connected to at least one shell. Characteristic multi-pole coaxial connector. 4. An end portion of the cable assembly includes a conductive ground plate for connecting together outer conductors of a large number of coaxial cables arranged side by side, and when the cover housing is closed, the end of the coaxial cable is higher than the ground plate. 4. The multi-layer structure according to claim 3, wherein the center conductor exposed at the distal end is pressed into contact with a corresponding counterpart contact, and the ground plate is pressed into contact with one of the shells of the base housing and the cover housing. Polar coaxial connector. 5. The multi-pole coaxial connector according to claim 3, wherein an end of said cable assembly is housed from the inner surface side into a concave portion formed on an inner surface of the cover housing in an open state. 6. An end portion of the cable assembly is inserted from a center conductor side into an insertion hole formed from a front end to a base end of the cover housing, and in the inserted state, each center conductor and the ground of the cable assembly are inserted. 5. The multi-pole coaxial connector according to claim 3, wherein the plate is exposed on an inner surface of the cover housing. 7. The multipolar coaxial connector according to claim 5, further comprising holding means for holding an end of the cable assembly in the cover housing in the open state. 8. The cover housing has a holding groove for holding a center conductor of the coaxial cable, and each center conductor is soldered to a metal coating formed independently on the bottom of the corresponding holding groove. 8. The multipolar coaxial connector according to claim 3, wherein said holding means includes said metal coating. 9. The holding means includes a shell for covering the cover housing, the shell being detachably mounted on the cover housing and holding at least the ground plate while being mounted on the cover housing. The multi-pole coaxial connector according to claim 7, wherein 10. The multi-layer structure according to claim 1, wherein a metal film forming the shell is formed on at least a part of the surface of at least one of the base housing and the cover housing. Polar coaxial connector. And a lock means for engaging the shells of the two housings with each other and electrically connecting the shells in a closed state, and a lock release means exposed to the outside to release the lock of the lock means. The multi-pole coaxial connector according to any one of claims 1 to 10.