CN2553162Y

CN2553162Y - Fixing rivet for crimping circuit board with improved structure

Info

Publication number: CN2553162Y
Application number: CN 02241267
Authority: CN
Inventors: 璩泽中
Original assignee: KAIWEI ELECTRONIC CO Ltd
Current assignee: KAIWEI ELECTRONIC CO Ltd
Priority date: 2002-07-05
Filing date: 2002-07-05
Publication date: 2003-05-28
Anticipated expiration: 2012-07-05

Abstract

The utility model relates to an improved fixed rivet used to press a circuit board, which is made of metal such as brass. In pressing a multilayer circuit board, the pressing operation is carried after the riveting fixation of a piece of sheet brass (coil), a piece of glass fiber cloth and a multilayer board. The utility model is characterized in that a plurality of axial opening cuts are preinstalled at the tube part of the rivet; in riveting, the impact end of the rivet can be broken into a plurality of parts according to the fixed cuts to sustain then the fixity of riveting, preventing the conventional metal rivet from splitting during impact loading and avoiding the loss and scrapping resulting from the short circuit of the multilayer board caused by the falling of fractured conductive debris; thus the fixity of riveting is sustained. The utility model has the advantages that an appropriate groove or a point broken wire is further arranged at the joint between the tube part of the rivet and a loop surface at the head end, forming a quick-broken part with a comparative frail structure which is applied in the second riveting location; since the riveted but inappropriate rivet can be removed easily, the removal difficulty of the rivet is lowered.

Description

The circuit board press fitting fixing rivet of architecture advances

Technical field

The utility model relates to the circuit board press fitting fixing rivet of a kind of rivet, particularly a kind of architecture advances.

Background technique

In the processing procedure of multilayer circuit board, generally have the pressing operation of multilayer circuit board, it is with copper sheet (paper tinsel), being mixed with the glass cloth of resin and the two-ply of cupric circuit in advance presses together, and before carrying out the pressing operation, for making Copper Foil (skin), the relative position up and down of glass cloth and two (many) laminate can precisely be located when pressing and unlikely staggering offs normal, generally all be to utilize metal (as brass) system rivet to be arranged on the positioning hole, again to impact rivet towards pin, the pipe portion opening end that makes rivet is hit and is out of shape and opens and be pressed on the plate face, to form the riveted stationary state.But, during actual job, if use the rivet of commonly using that metal (as brass) makes, when its pipe portion opening end opens being hit and is out of shape, powerful cracking takes place and produces a spot of conduction fracture detritus jointly in regular meeting, and drops on multiple-plate circuit and cause the anxiety of short circuit; Shortcoming in view of this; part manufacturer uses the polymer rivet instead and commonly uses rivet to replace common metal (as brass); make the non-conductive and unlikely line short that causes of a small amount of detritus that when cracking, is produced; yet the ductility of polymer rivet is relatively poor, with when pin impacts also regular meeting break and can't reach the riveted retention force that the virgin metal rivet is had.At above-mentioned shortcoming, this creator keeps on improving, and there is the generation of the circuit board press fitting fixing rivet of the utility model architecture advances the side, the problem that is met with when using effective solution circuit board pressing.

Summary of the invention

Technical problem to be solved in the utility model is, above-mentioned deficiency at prior art, avoid or the generation of the time conduction fracture detritus that lowers cracking and provide a kind of, and can keep ductility and do not weaken the riveted fixed function, and reach the circuit board press fitting fixing rivet of the architecture advances of good riveted fixed effect, this fixing rivet makes the cracking line of impact all can reach predetermined purpose when riveted; In the time must making for the second time riveted, this rivet can be pulled out from rivet hole is simple and easy again, the difficulty when avoiding known rivet to pull out.

Above-mentioned technical problem of the present utility model is realized by following technological scheme.

A kind of circuit board press fitting fixing rivet of architecture advances, this rivet has a pipe portion and die end two-part, it is characterized in that: promptly be preset with a plurality of equally spaced axially open cut channels simultaneously in moulding in the pipe portion of rivet, make when impacting riveted, the pipe portion opening end of this rivet can directly be bent into several lobes by the cut channel place that oneself sets and riveted is fixed.

Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:

This is located at axially open cut channel in the pipe portion and can be the complete disconnected slot type cut channel of wearing.

This axially open cut channel of being located in the pipe portion can be the complete disconnected groove type cut channel in end.

This axially open cut channel of being located in the pipe portion is advisable with 2-8 road cut channel.

This length of being located at the axially open cut channel in the pipe portion can and need and changes according to size.

This rivet can be further in its pipe portion and relative frangible portion on the jointing place of die end is established with a structure, in the time must doing for the second time the riveted location, make former own riveted but unusable rivet is able to simpler and easy construction and pulls out.

Can be the groove of an appropriate depth in the set frangible portion in the jointing place of pipe portion and die end.

Can be some broken string structure in the set frangible portion in the jointing place of pipe portion and die end.

Advantage of the present utility model is:

1, default at the pipe portion opening end of rivet with a plurality of axial cut channels, be provided with when pin impacts, the pipe portion opening end that this rivet is hit can be bent into several lobes according to the cut channel set is simple and easy, and distortion is pressed on the plate face to form the riveted stationary state, can avoid or the generation of the time conduction fracture detritus that lowers cracking, and ductility can be kept and do not weaken the riveted fixed function, and reach good riveted fixed effect.

2, default at the pipe portion opening end of rivet with a plurality of axial cut channels, to avoid when being hit cracking can related generation conducting electricity on a small quantity drop disappearance on the sandwich plate circuit of fracture detritus, and wherein, these a plurality of axial cut channels can need when making rivet in design and the mass production in response to shaping die, and form the complete disconnected groove type cut channel of wearing the slot type cut channel or breaking entirely, use the cracking line that makes impact and all reached predetermined purpose.

3, establish with suitable groove or some broken string at the pipe portion and the head end anchor ring jointing place ring of rivet, to form the relatively fragile destruction portion of structure, for must make for the second time again riveted the time just in case the rivet of former riveted location is bad, but this frangible portion of mat is pulled out this rivet from rivet hole is simple and easy, the difficulty when avoiding known rivet to pull out.

Because the structure of the utility model rivet is different from and commonly uses metal rivet or polymer rivet, so by following function comparison sheet, the utility model advantage in the use as can be known:

Stationarity conduction cracking detritus

(1) commonly uses that rivet is good to be easy to generate

(11) polymer rivet difference does not have

(111) the good difficult generation of the utility model rivet

For further understanding the feature of this case, enumerate specific embodiment and conjunction with figs. now and describe in detail as the back:

Description of drawings

Fig. 1 is the schematic perspective view of the utility model structure.

Look schematic representation on Fig. 2 Fig. 1.

Fig. 2 A is an A-A generalized section among Fig. 2.

Fig. 3 is the generalized section of the utility model rivet before riveted.

Fig. 4 is that the utility model rivet is being inserted in the generalized section of rivet hole.

Fig. 5 is the generalized section of the utility model rivet behind riveted.

Fig. 6 is another embodiment's of the utility model structure a schematic perspective view.

Look schematic representation on Fig. 7 Fig. 6.

Fig. 7 B is the B-B generalized section of Fig. 7.

Embodiment

Please refer to shown in Fig. 1,2, the 2A, the rivet 10 of the circuit board press fitting fixing rivet of the utility model architecture advances has a pipe portion 11 and a die end 12 two-part, its length and width (die end 12 footpath wide) and pipe portion 11 sizes are all about about 5mm or littler, for making the ductility that moulding has suitable foot with metal material (being generally the brass material) punching press; And it is fashionable at multilayer circuit board press, can be earlier with copper sheet (paper tinsel) 20, precisely contraposition is as shown in Figure 3 up and down for the two-layer substrate 40 that is mixed with the glass cloth 30 of resin and cupric circuit in advance, in each default rivet hole 41, respectively be inserted in a rivet 10 as shown in Figure 4 again, re-use riveting machine and carry out riveting job, pipe portion 11 opening ends 13 that make rivet 10 are hit and are out of shape and open and be pressed on the plate face, and live the plate face to form the riveted stationary state with die end 12 common clampings, it is characterized in that: promptly do not have a plurality of equally spaced axially open cut channels 14 simultaneously in advance in moulding in the pipe portion 11 of rivet 10, and this cut channel 14 can be complete disconnected slot type cut channel such as Fig. 1 of wearing, 2, shown in the 2A, or incomplete disconnected groove type cut channel 14 is as Fig. 6,7, shown in the 7B, wherein cut channel 14 is advisable with 2-8 road cut channel, and the length of cut channel can and need and changes according to size; When then carrying out riveting job to impact towards pin; pipe portion 11 opening ends 13 (end promptly is hit) of this rivet 10 can directly be fractured into several lobes by cut channel 14 places that set; and keep original riveted stationarity; make fracture place can not produce a small amount of conduction detritus or drop and cause short circuit at the sandwich plate circuit; can be as the polymer rivet because of poor ductility yet, cause when riveting job regular meeting and break and can't reach original riveted stationarity.

The utility model rivet 10 further can be established groove 15 with appropriate depth in pipe portion 11 and the jointing place of die end 12 shown in Fig. 1,2,2A again, or establish with a broken string 16, make and forming destructible portion relatively fragile on the structure on the die end 12 behind the riveted, supply when palpus work riveted second time location, make former own riveted but unusable rivet is able to simpler and easy construction pulls out, to reduce the degree of difficulty that rivet is pulled out.

In sum, the technological means that the utility model structure is quoted is solid non-difficult, but not seeing in the technical field of the circuit board press fitting fixing rivet of architecture advances has identical person to disclose formerly, and can reach the use effect of former expection again really, so the utility model should be had novelty and progressive, conform with novel patent application important document, sincerely please be known clearly and examine, and grant quasi patent for praying.

Claims

1, a kind of circuit board press fitting fixing rivet of architecture advances, this rivet have a pipe portion and die end two-part, it is characterized in that: promptly be preset with a plurality of equally spaced axially open cut channels simultaneously in moulding in the pipe portion of rivet.

2, the circuit board press fitting fixing rivet of architecture advances according to claim 1 is characterized in that: this is located at axially open cut channel in the pipe portion and can be the complete disconnected slot type cut channel of wearing.

3, the circuit board press fitting fixing rivet of architecture advances according to claim 1 is characterized in that: this axially open cut channel of being located in the pipe portion can be the complete disconnected groove type cut channel in end.

4, the circuit board press fitting fixing rivet of architecture advances according to claim 1 is characterized in that: this axially open cut channel of being located in the pipe portion is advisable with 2-8 road cut channel.

5, the circuit board press fitting fixing rivet of architecture advances according to claim 1 is characterized in that: this length of being located at the axially open cut channel in the pipe portion can be according to size and needs and is changed.

6, the circuit board press fitting fixing rivet of architecture advances according to claim 1 is characterized in that: this rivet can be further in its pipe portion and relative frangible portion on the jointing place of die end is established with a structure.

7, the circuit board press fitting fixing rivet of architecture advances according to claim 6, it is characterized in that: set frangible portion is the groove of an appropriate depth in the jointing place of pipe portion and die end.

8, the circuit board press fitting fixing rivet of architecture advances according to claim 6 is characterized in that: the frangible portion set in the jointing place of pipe portion and die end is some broken string structure.