CA2082877A1 - Subrack with clamping devices - Google Patents
Subrack with clamping devicesInfo
- Publication number
- CA2082877A1 CA2082877A1 CA 2082877 CA2082877A CA2082877A1 CA 2082877 A1 CA2082877 A1 CA 2082877A1 CA 2082877 CA2082877 CA 2082877 CA 2082877 A CA2082877 A CA 2082877A CA 2082877 A1 CA2082877 A1 CA 2082877A1
- Authority
- CA
- Canada
- Prior art keywords
- subrack
- holding rail
- clamping device
- thrust strip
- thrust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1404—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by edge clamping, e.g. wedges
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
Abstract Subrack with Clamping Devices To fix printed circuit boards in guide grooves (4) of a subrack (1) by means of clamping devices (5) in a shock-and vibration-proof manner, the guide grooves (4) have a T-like cross section and are provided with undercuts.
The latter receive the self-locking clamping devices (5), which each consist of a flat holding rail (7) and a thrust strip (8) slidably mounted thereon. The thrust strip (8) contains slots (10) through which extend pins (9) of the holding rail (7) and whose longitudinal axis make an acute angle with the longitudinal axis of the thrust strip (8).
By turning an actuating screw (13) extending through an oblong hole in a supporting tongue (11) of the holding rail (7), the thrust strip(8)is moved both longitudinally and transversely to the holding rail (7) until the printed circuit board inserted into a recess (17) of the guide groove (8) is firmly clamped between the thrust strip (8) and a lateral locating surface (18) of the re-cess (17).
Fig. 1
The latter receive the self-locking clamping devices (5), which each consist of a flat holding rail (7) and a thrust strip (8) slidably mounted thereon. The thrust strip (8) contains slots (10) through which extend pins (9) of the holding rail (7) and whose longitudinal axis make an acute angle with the longitudinal axis of the thrust strip (8).
By turning an actuating screw (13) extending through an oblong hole in a supporting tongue (11) of the holding rail (7), the thrust strip(8)is moved both longitudinally and transversely to the holding rail (7) until the printed circuit board inserted into a recess (17) of the guide groove (8) is firmly clamped between the thrust strip (8) and a lateral locating surface (18) of the re-cess (17).
Fig. 1
Description
, Subrack with Clamping Dev;ces The present invention relates to a subrack with clamping devices as set forth in the preamble of claim 1. Such subracks serve to mount units, preferably printed c;r-cu;t boards, which are releasably fixed in the subrack by means of at least one clamping device each.
Such a subrack with clamping devices is disclosed in DE 29 20 ~68 C2~ The sidewalls of the subrack, which is des;gned as an enclosure, contain guide grooves of U-shapedsection. Each guide groove ;s fitted w;th a clamp-ing dev;ce consist;ng of two parallel,spaced-apart flat bars which are pivotally interconnected by a number of inclined bridge members. By means of an actuating screw connected with the housing, one flat bar is longitud;nally movable relative to the other flat bar, which ;s supported by the enclosure and in the guide groove. This produces a clamping force acting ;n the d;rection of the printed circuit board.
.
DE-OS 19 53 363 discloses a tensioning device consisting of several thrust pieces which occupy essentially the whole length of a guide groove and have wedge surfaces arranged at an angle to the longitudinal axis. The thrust pieces are movable divergingly by means of an actuat;ng screw, so that, if the guide grooYe is ~ide enough and the tensioning device is mounted centrally there;n, a printed circuit board can be clamped between the tens;on;ng device and each of the Lateral groove walls.
It is the object of the invention to provide a subrack hav;ng a clamping device of low o~erall height ~herein the clamping device requires only a minimum clamping area at the pr;nted c;rcuit board to securely fix the latter in pos;t;on. Nevertheless, the clamping is to have a relatively high res;stance to shock and vibration. This object, according to the invention, is attained by the features set forth in claim 1. Further advantageous fea-tures of the invention are defined in the subclaims. The invention has the advantage that all requirements of its object are sat;sfied, and that, in addition, the clamping device consists of only very few, s;mple component parts which can be made with tolerances as are commonly re-quired in precision mechan;cs, and can be assembled w;th-out difficulty. Therefore, the clamping device can be fabricated very econom;cally, i.e., at relatively low cost. No additional mounting parts are necessary. Although only an extremely small clamping area is needed at the printed circuit board, the high contact pressure achievable with the clamping device permits a ground connection as well as good thermal contact with low electrical and thermal contact resistance to be established between the subrack and suitably metallized areas on the printed cir-cu;t board. Further advantages are mentioned in the de-scription.
The invention will now be described in more detail with reference to an embodiment illustrated in the accompanying 20~28~7 drawings, ;n which:
Fig. 1 is a longitudinal sect;on of a subrack f;tted w;th several clamping devices;
F;g. 2 ;s a front view of part of the subrack of F;go 1 with pr;nted c;rcu;t boards f;xed therein;
Fig. 3 is a side view of a clamping device as shown in Fig. 1;
Fig. 4 ;s a top view of the clamping dev;ce of F;g. 3, and Fig. 5 ;s a front view of a subrack assembly with several gu;de grooves for rece;ving a corresponding number of clamping devices.
In the drawings, the subrack ;s designated 1. In the em-bodiment shown, the subrack ;s designed as an enclo~
sure which has a tubular ~iddle portion 2 of essentially rectangular section and whose open ends are closable by cover plates or caps (not shown). The middle portion 2 preferably made of aluminum, is, for example, a die-cast part or an extruded shape cut to length. It may also con-sist of two shaped rails fitted together. The subrack 1 may also be of an unenclosed design, of course, in which essentiaLly only shaped bars are attached to each other in horizontal and vertîcal positions so as to form a rectangular-parallelepiped-shaped frame rack having guide bars ly;ng opposite each othern As shown part;cularly in F;y. 5, the middle portion 2 ofthe enclosed subrack 1 has guide grooves 4 in at least one side-wall 3, but preferably in two opposite sidewa(ls, with the open sides of the grooves facing each other. In the unenclosed, frame-shaped version of the subrack 1, each guide rail has at least one such guide groove 4. The guide groove 4 has an undercut, T-like cross section and ser~es to receive a clamping device 5 and to guide and locate the longitudinal edge of a printed circu;t board 6 whenthe latter is being fixed in position (Fig. 2~.
The clamping device 5, shown separately in Figs. 3 and 4, consists essentially of a holding rail 7 and a thrust strip 8 slidably mounted thereon, which contains at least two slots 10, through each of which extends a pin 9 of the holding ra;l 7 and whose longitudinal axes make an acute angle with the longitudinal axis of the thrust strip 8. The hoLding rail 7 is a sheet-metal strip of rectangular section, e.g., a sta;nless-steel strip, pro-~ided at one end with a rectangularly upwardly bent sup-porting tongue 11. This supporting tongue 11, which is sLightly narrower than the thrust strip 8, contains an oblong hole extending parallel to the bending edge.
The thrust strip 8, which rests essentially flat on the holding rail 7, also has a rectangular cross section.
It is, for example, a length of a semi-finished product, e.g., flat aluminum, or a die-cast part and is approximately twice as thick as, but narrower than, the holding rail 7. The end of the thrust strip 8 pointing toward the supporting tongue 11 of the holding rail 7 contains a tapped hole which extends from the end face to an opening 12 in the thrust strip 8, said opening 12 serving to facilitate the formation of the tapped hole.
The latter contains the shank 14 of an actuating screw 13 inserted from outside through the oblong hoLe in the supporting tongue 11, such that between the support;ng tongue 11 of the holding raiL 7 and the thrust strip 8, there is st;ll a sufficient d;stance for displacement.
The actuating screw 13 is a commercially auailable stan-dard screw with a right-hand thread. If the clamping de-vice 5 is to be adapted for frequent use, a compression spring (not shown), serving as a restoring element, and/
or a retaining washer (not shown) will be provided on the shank 14 between supporting tongue 11 and thrust strip 8.
ay turning the actuating screw 18 clockwise, the thrust strip 8 is moued both in the direction of the supporting tongue 11 and transuersely to the holding rail 7, with the screw shank 14 sliding in the oblong pole and the screw head alon~ the outside of the supportin~ ton~ue 1?, the screw head being preferably underlaid with a washer 15~ To achieve opti-mum clamping action, the angle between the longitudinal axes of the slots 10, which are arranged parallel to each other, and the thrust strip 8 is preferably 30. The pins 9, which extend through the slots 10 of the thrust str;p 8, are spaced relatiuely far apart and are fastened centrally in the holding rail 7, e.g., by riueting or flanging the hollow pin end. The pins 9 haue a flat head whose d;ameter is greater than the width of the slot 10, and prevent the thrust strip 8 from lifting.
The T-like guid~e grooue 4 in the subrack 1 and the clamp-ing device 5 are adapted to one another in cross section, such that the latter can be inserted from an open end in-to the guide groove 4 w;th slight pressure~ The long;tu-dina( edges of the hoLding ra;l 7 are recei~ed and guided by the Lateral undercuts, while the thrust strip 8 is recei~ed in the open portion of the guide groove 4 ~ith relatiYely much lateral play. In order that the cla~ping deuice 5 can hold itseLf in the guide groove 4 in a self-locking manner, the hoiding ra;l 7 ;s sl;ghtly bent in one or both end regions between pin 9 and ra;l end, so that it is ~ertical(y resilient and compensates for thickness to~erances of both the holding rail 7 and the guide grooYe 4. Lf the pins 9, as can be seen ;n the embodiment shown in the draw;ngs, are so fastened in the holding rail 7 that material projects at the underside, the groo~e bottom has a sufficient~y large depression 16, which can be omitted if the pins are fastened in a manner requiring no project;ng mater;aL. In any case, one side-wall of the guide groove 4 has a steplike recess ~7 which widens the groo~e opening and forms the receptacle proper for the printed circuit board 6, since its bottom guides the Longitudinal edge of the printed circuit board 6 during insertion, while its side serYeS as a locating surface 18 for the board (Figs. 1 and 5).
If the guide grooYes 4 are equipped with unoperated clamp-ing deYices 5, and printed circuit boards 6 are inserted loosely into the subr3ck 1 from an open side, the printed circuit board 6 will be f;xed in position by turni~g the actuating screws 13, whereby narrow edge regions of the printed circuit board 6 are each firmly clamped between one long side 19 of the thrust strip 8 and the complementary locating surface 18 in the guide groove 4. As the actuat-ing screws 13 are rotated, causing the thrust strip 8 to bepressed against the printed circuit board 6, the hold-ing rails 7 are so firmLy clamped in the guide grooves 4 that the cLamping devices 5 are securely held therein and the printed circu;t board 6 is held in a shock- and vibration-proof manner. By turning the actuating screws 13 counterclockwise, the fi~in~ is released.
Tolerances acting in the direction of the pressure exerted by the cLamp;ng devices 5, wh;ch result during the manu-facture and formation of pins 9 and slots 10 and are aLso present in the profile of the guide groove 4, are com-pensatedforby a spec;a~ shape of the hoLd;ng raiL 7.
For th;s reason, the narrow long sides of the hoLding rails 7~
starting from a short center portion w;th paralle~ long sides, extend sLightLy conically toward both ends. Under clamping pressure, this design permits a sLight elastic deformation of the hoLding ra;L 7, wh;ch causes part;cuLarly f;rm ten-sioning ;n the gu;de groove 4 and simultaneously ensures that the thrust strip 8 ;s pressed aga;nst the printed circuit board 6 along its entire length with approximately equaL force. The tensioning also prevents the clamping de-vice 5 from loosening, and the clamping device needs only an extremely small clamping area to secureLy fix the printed circuit board 6 in position. If, for example, the holding rail 7 and the thrust strip 8 are 2 mm and 4 mm thick, respectively, and the distance between undercut and ~ecess 17 of the guide groove 4 is ~.5 mm, only a 2.5-mm-wide stripe is needed at the printed circuit board 6 to securely fix the latter in position. This low area require-ment permits a high degree of utilization of the printed circuit board 6, which can be equipped with components both on one side and on both s;des. The component space 20 is indicated in Fig~ 2 by dash-and-dot lines.
Such a subrack with clamping devices is disclosed in DE 29 20 ~68 C2~ The sidewalls of the subrack, which is des;gned as an enclosure, contain guide grooves of U-shapedsection. Each guide groove ;s fitted w;th a clamp-ing dev;ce consist;ng of two parallel,spaced-apart flat bars which are pivotally interconnected by a number of inclined bridge members. By means of an actuating screw connected with the housing, one flat bar is longitud;nally movable relative to the other flat bar, which ;s supported by the enclosure and in the guide groove. This produces a clamping force acting ;n the d;rection of the printed circuit board.
.
DE-OS 19 53 363 discloses a tensioning device consisting of several thrust pieces which occupy essentially the whole length of a guide groove and have wedge surfaces arranged at an angle to the longitudinal axis. The thrust pieces are movable divergingly by means of an actuat;ng screw, so that, if the guide grooYe is ~ide enough and the tensioning device is mounted centrally there;n, a printed circuit board can be clamped between the tens;on;ng device and each of the Lateral groove walls.
It is the object of the invention to provide a subrack hav;ng a clamping device of low o~erall height ~herein the clamping device requires only a minimum clamping area at the pr;nted c;rcuit board to securely fix the latter in pos;t;on. Nevertheless, the clamping is to have a relatively high res;stance to shock and vibration. This object, according to the invention, is attained by the features set forth in claim 1. Further advantageous fea-tures of the invention are defined in the subclaims. The invention has the advantage that all requirements of its object are sat;sfied, and that, in addition, the clamping device consists of only very few, s;mple component parts which can be made with tolerances as are commonly re-quired in precision mechan;cs, and can be assembled w;th-out difficulty. Therefore, the clamping device can be fabricated very econom;cally, i.e., at relatively low cost. No additional mounting parts are necessary. Although only an extremely small clamping area is needed at the printed circuit board, the high contact pressure achievable with the clamping device permits a ground connection as well as good thermal contact with low electrical and thermal contact resistance to be established between the subrack and suitably metallized areas on the printed cir-cu;t board. Further advantages are mentioned in the de-scription.
The invention will now be described in more detail with reference to an embodiment illustrated in the accompanying 20~28~7 drawings, ;n which:
Fig. 1 is a longitudinal sect;on of a subrack f;tted w;th several clamping devices;
F;g. 2 ;s a front view of part of the subrack of F;go 1 with pr;nted c;rcu;t boards f;xed therein;
Fig. 3 is a side view of a clamping device as shown in Fig. 1;
Fig. 4 ;s a top view of the clamping dev;ce of F;g. 3, and Fig. 5 ;s a front view of a subrack assembly with several gu;de grooves for rece;ving a corresponding number of clamping devices.
In the drawings, the subrack ;s designated 1. In the em-bodiment shown, the subrack ;s designed as an enclo~
sure which has a tubular ~iddle portion 2 of essentially rectangular section and whose open ends are closable by cover plates or caps (not shown). The middle portion 2 preferably made of aluminum, is, for example, a die-cast part or an extruded shape cut to length. It may also con-sist of two shaped rails fitted together. The subrack 1 may also be of an unenclosed design, of course, in which essentiaLly only shaped bars are attached to each other in horizontal and vertîcal positions so as to form a rectangular-parallelepiped-shaped frame rack having guide bars ly;ng opposite each othern As shown part;cularly in F;y. 5, the middle portion 2 ofthe enclosed subrack 1 has guide grooves 4 in at least one side-wall 3, but preferably in two opposite sidewa(ls, with the open sides of the grooves facing each other. In the unenclosed, frame-shaped version of the subrack 1, each guide rail has at least one such guide groove 4. The guide groove 4 has an undercut, T-like cross section and ser~es to receive a clamping device 5 and to guide and locate the longitudinal edge of a printed circu;t board 6 whenthe latter is being fixed in position (Fig. 2~.
The clamping device 5, shown separately in Figs. 3 and 4, consists essentially of a holding rail 7 and a thrust strip 8 slidably mounted thereon, which contains at least two slots 10, through each of which extends a pin 9 of the holding ra;l 7 and whose longitudinal axes make an acute angle with the longitudinal axis of the thrust strip 8. The hoLding rail 7 is a sheet-metal strip of rectangular section, e.g., a sta;nless-steel strip, pro-~ided at one end with a rectangularly upwardly bent sup-porting tongue 11. This supporting tongue 11, which is sLightly narrower than the thrust strip 8, contains an oblong hole extending parallel to the bending edge.
The thrust strip 8, which rests essentially flat on the holding rail 7, also has a rectangular cross section.
It is, for example, a length of a semi-finished product, e.g., flat aluminum, or a die-cast part and is approximately twice as thick as, but narrower than, the holding rail 7. The end of the thrust strip 8 pointing toward the supporting tongue 11 of the holding rail 7 contains a tapped hole which extends from the end face to an opening 12 in the thrust strip 8, said opening 12 serving to facilitate the formation of the tapped hole.
The latter contains the shank 14 of an actuating screw 13 inserted from outside through the oblong hoLe in the supporting tongue 11, such that between the support;ng tongue 11 of the holding raiL 7 and the thrust strip 8, there is st;ll a sufficient d;stance for displacement.
The actuating screw 13 is a commercially auailable stan-dard screw with a right-hand thread. If the clamping de-vice 5 is to be adapted for frequent use, a compression spring (not shown), serving as a restoring element, and/
or a retaining washer (not shown) will be provided on the shank 14 between supporting tongue 11 and thrust strip 8.
ay turning the actuating screw 18 clockwise, the thrust strip 8 is moued both in the direction of the supporting tongue 11 and transuersely to the holding rail 7, with the screw shank 14 sliding in the oblong pole and the screw head alon~ the outside of the supportin~ ton~ue 1?, the screw head being preferably underlaid with a washer 15~ To achieve opti-mum clamping action, the angle between the longitudinal axes of the slots 10, which are arranged parallel to each other, and the thrust strip 8 is preferably 30. The pins 9, which extend through the slots 10 of the thrust str;p 8, are spaced relatiuely far apart and are fastened centrally in the holding rail 7, e.g., by riueting or flanging the hollow pin end. The pins 9 haue a flat head whose d;ameter is greater than the width of the slot 10, and prevent the thrust strip 8 from lifting.
The T-like guid~e grooue 4 in the subrack 1 and the clamp-ing device 5 are adapted to one another in cross section, such that the latter can be inserted from an open end in-to the guide groove 4 w;th slight pressure~ The long;tu-dina( edges of the hoLding ra;l 7 are recei~ed and guided by the Lateral undercuts, while the thrust strip 8 is recei~ed in the open portion of the guide groove 4 ~ith relatiYely much lateral play. In order that the cla~ping deuice 5 can hold itseLf in the guide groove 4 in a self-locking manner, the hoiding ra;l 7 ;s sl;ghtly bent in one or both end regions between pin 9 and ra;l end, so that it is ~ertical(y resilient and compensates for thickness to~erances of both the holding rail 7 and the guide grooYe 4. Lf the pins 9, as can be seen ;n the embodiment shown in the draw;ngs, are so fastened in the holding rail 7 that material projects at the underside, the groo~e bottom has a sufficient~y large depression 16, which can be omitted if the pins are fastened in a manner requiring no project;ng mater;aL. In any case, one side-wall of the guide groove 4 has a steplike recess ~7 which widens the groo~e opening and forms the receptacle proper for the printed circuit board 6, since its bottom guides the Longitudinal edge of the printed circuit board 6 during insertion, while its side serYeS as a locating surface 18 for the board (Figs. 1 and 5).
If the guide grooYes 4 are equipped with unoperated clamp-ing deYices 5, and printed circuit boards 6 are inserted loosely into the subr3ck 1 from an open side, the printed circuit board 6 will be f;xed in position by turni~g the actuating screws 13, whereby narrow edge regions of the printed circuit board 6 are each firmly clamped between one long side 19 of the thrust strip 8 and the complementary locating surface 18 in the guide groove 4. As the actuat-ing screws 13 are rotated, causing the thrust strip 8 to bepressed against the printed circuit board 6, the hold-ing rails 7 are so firmLy clamped in the guide grooves 4 that the cLamping devices 5 are securely held therein and the printed circu;t board 6 is held in a shock- and vibration-proof manner. By turning the actuating screws 13 counterclockwise, the fi~in~ is released.
Tolerances acting in the direction of the pressure exerted by the cLamp;ng devices 5, wh;ch result during the manu-facture and formation of pins 9 and slots 10 and are aLso present in the profile of the guide groove 4, are com-pensatedforby a spec;a~ shape of the hoLd;ng raiL 7.
For th;s reason, the narrow long sides of the hoLding rails 7~
starting from a short center portion w;th paralle~ long sides, extend sLightLy conically toward both ends. Under clamping pressure, this design permits a sLight elastic deformation of the hoLding ra;L 7, wh;ch causes part;cuLarly f;rm ten-sioning ;n the gu;de groove 4 and simultaneously ensures that the thrust strip 8 ;s pressed aga;nst the printed circuit board 6 along its entire length with approximately equaL force. The tensioning also prevents the clamping de-vice 5 from loosening, and the clamping device needs only an extremely small clamping area to secureLy fix the printed circuit board 6 in position. If, for example, the holding rail 7 and the thrust strip 8 are 2 mm and 4 mm thick, respectively, and the distance between undercut and ~ecess 17 of the guide groove 4 is ~.5 mm, only a 2.5-mm-wide stripe is needed at the printed circuit board 6 to securely fix the latter in position. This low area require-ment permits a high degree of utilization of the printed circuit board 6, which can be equipped with components both on one side and on both s;des. The component space 20 is indicated in Fig~ 2 by dash-and-dot lines.
Claims (10)
1. A subrack having guide grooves for plug-in units, particularly printed circuit boards, which are fixable in position by means of actuating screws of clamping -devices arranged in the guide grooves and each consist-ing of a holding rail of rectangular section and a thrust strip of rectangular section slidably mounted on said holding rail, c h a r a c t e r i z e d i n that the guide groove (4) is provided with two undercuts receiving the longi-tudinal edges of the holding rail (7), that the holding rail (7) and the thrust strip (8), which is narrower than the holding rail (7), rest essentially flat against each other, and that the thrust strip (8) contains slots (10) through which extend pins (9) of the holding rail (7) and whose longitudinal axes make an acute angle with the longitudinal axis of the thrust strip (8).
2. A subrack with a clamping device as claimed in claim 1, characterized in that the holding rail (7) has a supporting tongue (11) at one end, and that the end of the thrust strip (8) pointing toward the supporting tongue (11) has a tapped hole which contains an actuating screw (13) inserted through an oblong hole in the supporting tongue (11).
ZPL/S-Ka/Ke/Lo K. Klopfer - B. Riedl 1-1 02.11.92
ZPL/S-Ka/Ke/Lo K. Klopfer - B. Riedl 1-1 02.11.92
3. A subrack with a clamping device as claimed in claim 2, characterized in that between the supporting tongue (11) of the holding rail (7) and the thrust strip (8), a compression spring is provided on the shank (14) of the actuating screw (13).
4. A subrack with a clamping device as claimed in claim 2, characterized in that directly behind the supporting tongue (11), a retaining washer is provided on the shank (14) of the actuating screw (13).
5. A subrack with a clamping device as claimed in claim 1, characterized in that in at least one end portion be-tween pin (9) and rail end, the holding rail (7) has a bend to compensate for tolerance variations in the under-cuts of the guide groove (4).
6. A subrack with a clamping device as claimed in claim 1, characterized in that the long sides of the holding rail (7), starting from a center portion with parallel long sides, extend conically toward both ends.
7. A subrack with a clamping device as claimed in claim 1, characterized in that the longitudinal axis of each of the slots (10) and the longitudinal axis of the thrust strip (8) form an angle of 30°.
8. A subrack with a clamping device as claimed in claim 1, characterized in that one sidewall of the guide groove (4) is provided with a recess (17), and that the printed circuit board (6) can be clamped between the locating surface (18) of said recess (17) and the long side (19) of the thrust strip (8).
9. A subrack with a clamping device as claimed in claim 8, characterized in that the guide grooves (4) are provided in the sidewalls (3) of a die-cast or extruded part (middle portion 2).
10. A subrack with a clamping device as claimed in claim 1, characterized in that the guide rails used with unenclosed subracks (1) each contain at least one guide groove (4) provided with a clamping device (5).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4137443.6 | 1991-11-14 | ||
| DE19914137443 DE4137443A1 (en) | 1991-11-14 | 1991-11-14 | ASSEMBLY CARRIER WITH CLAMPING DEVICES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2082877A1 true CA2082877A1 (en) | 1993-05-15 |
Family
ID=6444784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2082877 Abandoned CA2082877A1 (en) | 1991-11-14 | 1992-11-13 | Subrack with clamping devices |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0542163A1 (en) |
| JP (1) | JPH06209172A (en) |
| CA (1) | CA2082877A1 (en) |
| DE (1) | DE4137443A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI565390B (en) * | 2014-11-07 | 2017-01-01 | 英業達股份有限公司 | Assembly having electronic component and structure for fixing the electronic component |
| CN210274897U (en) * | 2019-06-26 | 2020-04-07 | 昆山首源电子科技有限公司 | Concatenation formula multilayer circuit board |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1433402A (en) * | 1965-01-26 | 1966-04-01 | Bull General Electric | System for plugging circuit boards into a card drawer |
| DE1953363A1 (en) * | 1968-06-06 | 1971-05-13 | Telefunken Patent | Plate clamping device |
| DE2920468C2 (en) * | 1979-05-21 | 1982-08-12 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Clamping element for releasably securing printed circuit boards inserted into grooves in a housing |
| US4354770A (en) * | 1980-05-19 | 1982-10-19 | The United States Of America As Represented By The Secretary Of The Navy | Wedge assembly |
| US4525770A (en) * | 1984-04-02 | 1985-06-25 | United Technologies Corporation | Clamping circuit board guides |
-
1991
- 1991-11-14 DE DE19914137443 patent/DE4137443A1/en not_active Withdrawn
-
1992
- 1992-11-07 EP EP92119110A patent/EP0542163A1/en not_active Withdrawn
- 1992-11-13 CA CA 2082877 patent/CA2082877A1/en not_active Abandoned
- 1992-11-16 JP JP30564692A patent/JPH06209172A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE4137443A1 (en) | 1993-05-19 |
| JPH06209172A (en) | 1994-07-26 |
| EP0542163A1 (en) | 1993-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |