CN108925039A - The preparation method of mobile terminal, circuit board assemblies and circuit board assemblies - Google Patents
The preparation method of mobile terminal, circuit board assemblies and circuit board assemblies Download PDFInfo
- Publication number
- CN108925039A CN108925039A CN201810667009.6A CN201810667009A CN108925039A CN 108925039 A CN108925039 A CN 108925039A CN 201810667009 A CN201810667009 A CN 201810667009A CN 108925039 A CN108925039 A CN 108925039A
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- CN
- China
- Prior art keywords
- circuit board
- pin
- link slot
- touch
- switch
- 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.)
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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
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0277—Details of the structure or mounting of specific components for a printed circuit board assembly
-
- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
- H05K3/305—Affixing by adhesive
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10053—Switch
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Signal Processing (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Push-Button Switches (AREA)
Abstract
The present invention discloses a kind of circuit board assemblies, it includes touch-switch, heat cushion rubber and circuit board, touch-switch includes the first pin and second pin, hot melt cushion rubber is mounted on touch-switch, first pin and second pin are located among hot melt cushion rubber area defined, first link slot opposite with the first pin and second link slot opposite with second pin are provided on circuit board, it is adhesively fixed towards the plate face of the surface of circuit board and circuit board by heating cushion rubber on touch-switch, the external connection end of first pin contradicts on the bottom wall of the first link slot, and it is electrically connected with the bottom wall of the first link slot, the external connection end of second pin contradicts on the bottom wall of the second link slot, and it is electrically connected with the bottom wall of the second link slot.Above scheme can solve touch-switch and there is a problem of that cost is higher and it is larger to be formed by circuit board assemblies width dimensions on circuit boards using paster technique installation.Invention additionally discloses the preparation methods of a kind of mobile terminal and circuit board assemblies.
Description
Technical field
The present invention relates to technical field of mobile terminals more particularly to a kind of mobile terminals, circuit board assemblies and circuit board group
The preparation method of part.
Background technique
Currently, mobile terminal has become tool indispensable in people's daily life.It is continuous with user demand
It is promoted, the performance of mobile terminal is more and more excellent, especially the appearance property of mobile terminal.Current mobile terminal is towards frivolous
Change direction to develop, the side frame of the shell of mobile terminal becomes more and more narrow, this component for needing to be arranged on side frame has
The smaller feature of more compact and occupied space.
Key is usually laid on the side frame of shell, the width of key will affect the thickness of side frame to a certain extent
Degree, and then influence the complete machine thickness of mobile terminal.Currently, key includes being assembled using the touch-switch of paster technique installation
During, touch-switch is laid on the circuit board of key by paster technique, and then forms circuit board assemblies.
Touch-switch is due to realizing installation on circuit boards using paster technique, it is therefore desirable to pass through reflow soldering, return
The operating temperature of fluid welding furnace is higher, this proposes higher want to material used by touch-switch and circuit board in terms of high temperature resistant
It asks, and then the circuit board assemblies cost that will lead to side switch is higher.
In addition, in order to realize waterproof, manufacturer needs at the pin of touch-switch after touch-switch is installed in place
Dispensing is carried out, only there are feed liquor risk, waterproof performance is unable to satisfy requirement for dispensing at pin.Therefore, it is usually touching at present
The surrounding dispensing of switch needs to reserve biggish glue space on circuit boards, it is obvious that this will lead to electricity in such cases
The width of road plate increases, it is obvious that the circuit board assemblies that this is unfavorable for being formed after touch-switch and circuit board assembling are relatively narrow
Installation in space (such as side frame of shell).
Summary of the invention
The present invention discloses a kind of circuit board assemblies, with solve current touch-switch using paster technique there are cost it is higher and
It is formed by the larger problem of circuit board assemblies width.
To solve the above-mentioned problems, the present invention adopts the following technical solutions：
A kind of circuit board assemblies include touch-switch, hot melt cushion rubber and circuit board, and the touch-switch includes the first pin
And second pin, the hot melt cushion rubber are mounted on the touch-switch, first pin and the second pin are located at institute
State among hot melt cushion rubber area defined, be provided on the circuit board first link slot opposite with first pin and
Second link slot opposite with the second pin, towards the surface of the circuit board and the circuit board on the touch-switch
Plate face be adhesively fixed by the hot melt cushion rubber, the external connection end of first pin contradicts the bottom wall in first link slot
It above and with the bottom wall of first link slot is electrically connected, the external connection end of the second pin is contradicted in second link slot
It is electrically connected on bottom wall and with the bottom wall of second link slot.
A kind of mobile terminal comprising circuit board assemblies described above.
A kind of preparation method of circuit board assemblies, including：
Hot melt cushion rubber is mounted on touch-switch and is opened up on circuit boards the first link slot and the second link slot, institute
Stating touch-switch includes the first pin and second pin, and first pin and the second pin are located at hot melt cushion rubber institute
Within the region surrounded；
By the touch-switch and being integrally placed on the circuit board of being assembled into of hot melt cushion rubber, so that described the
The external connection end of one pin protrudes into first link slot and the external connection end of the second pin protrudes into second link slot
In；
It is set to be affixed to the pressure of the circuit board touch-switch application, so that the external connection end of first pin
Bottom wall conflict and the external connection end of the second pin and the bottom wall of second link slot with first link slot contradict；
In the state that the pressure is kept, the touch-switch, the hot melt cushion rubber and the circuit board are formed
Black box be put into high temperature furnace and heated so that the touch-switch towards the circuit board plate face with it is described
The plate face of circuit board is adhesively fixed by the hot melt cushion rubber；
The black box after heat treatment is cooled down, the circuit board assemblies are obtained.
The technical solution adopted by the present invention can reach following beneficial effect：
It is offered in circuit board assemblies disclosed by the invention, on circuit board opposite with the first pin and second pin respectively
First link slot and the second link slot, during assembling, hot melt cushion rubber can be pre-installed on touch-switch, then will
The entirety that hot melt cushion rubber is formed with touch-switch is heated after being attached to circuit board, while ensuring the external connection end of the first pin
Conflict between the external connection end of conflict and second pin between the bottom wall of the first link slot and the bottom wall of the second link slot,
It is final realize touch-switch towards circuit board plate face and circuit board plate face between gluing between the two realized by hot melt adhesive
Connect fixation.Since hot melt adhesive circle is laid around the first pin and second pin, and it is bonded in touch-switch and circuit board phase again
Pair plate face between, therefore realize to touch-switch waterproof under the premise of, without on circuit boards reserve dispensing needed for sky
Between, also would not increasing circuit plate width, be conducive to reduce circuit board assemblies occupied space.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of circuit board assemblies disclosed by the embodiments of the present invention, and members are in explosion like in Fig. 1
State；
Fig. 2 is structural schematic diagram of the part-structure of Fig. 1 under another visual angle；
Fig. 3 is the diagrammatic cross-section after touch-switch and hot melt cushion rubber assembling；
Fig. 4 is the diagrammatic cross-section placed after touch-switch is assembled with hot melt cushion rubber on circuit boards；
Fig. 5 is the sectional view after touch-switch is integrally assembled on circuit board with hot melt cushion rubber；
Fig. 6 is touch-switch and the assembling process schematic diagram for heating cushion rubber；
Fig. 7 is the whole process schematic to circuit board over-assemble that touch-switch and hot melt cushion rubber are assembled into；
Wherein, external connection end 111 is connected in Fig. 3-Fig. 5, on the first pin 110 and the position at end 112 is inscribed not in figure
Shown in section, therefore can not be shown in figure.Equally, external connection end 121 is connected in second pin 120 and end 122 is inscribed
In the section not shown in the figure of position, therefore it can not be shown in figure.
Description of symbols：
100- touch-switch, the first pin of 110-, 111- external connection end, 1101- first segment, 1102- second segment, 112- are inscribed
End, 120- second pin, 121- external connection end, 1201- third section, the 4th section of 1202-, 122- be inscribed end, 130- insulator foot,
131- boss, 140- metal clips, 200- heat cushion rubber, 300- circuit board, the first link slot of 310-, the second link slot of 320-.
The gap a-, the gap b-, the gap c-.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Below in conjunction with attached drawing, technical solution disclosed in each embodiment that the present invention will be described in detail.
Fig. 1-Fig. 7 is please referred to, the embodiment of the present invention discloses a kind of circuit board assemblies, and disclosed circuit board assemblies include light
Touch switch 100, hot melt cushion rubber 200 and circuit board 300.
Touch-switch 100 includes the first pin 110 and second pin 120, and the first pin 110 and second pin 120 are wrapped
It includes inscribed end and external connection end, inscribed end is usually located at the inside of touch-switch 100, when touch-switch is pressed, first draws
The inscribed end 112 of foot 110 is electrically connected with the inscribed end 122 of second pin 120, and when cancelling pressure, the first pin 110 is inscribed
Disconnection is electrically connected between end 112 and the inscribed end 122 of second pin 120.The external connection end 111 of first pin 110 is drawn with second
The external connection end 121 of foot 120 is electrically connected with position corresponding on circuit board 300 respectively.
Hot melt cushion rubber 200 is mounted on touch-switch 100, and between touch-switch 100 and circuit board 300, in turn
After being heated realize touch-switch 100 and hot melt cushion rubber 200 between and hot melt cushion rubber 200 and circuit board 300 it
Between be adhesively fixed, circuit board assemblies disclosed by the invention be by heat treatment after touch-switch 100, hot melt 200 and of cushion rubber
The product that circuit board 300 is fixed together.Heat cushion rubber 200 is solid-state at normal temperature, can be melted in heat treatment
And play bonding effect.First pin 110 and second pin 120 are respectively positioned in the region that hot melt cushion rubber 200 is encircled a city.
The first link slot 310 and the second link slot 320 are provided on circuit board 300.First link slot 310 and the first pin
110 is positioned opposite, and the second link slot 320 and second pin 120 are positioned opposite.
On touch-switch 100 towards between the surface of circuit board 300 and the plate face of circuit board 300 by hot melt cushion rubber 200
Be adhesively fixed, the external connection end 111 of the first pin 110 contradict on the bottom wall of the first link slot 310 and with the first link slot 310
Bottom wall electrical connection, the external connection end 121 of second pin 120 contradict on the bottom wall of the second link slot 320 and with the second link slot
320 bottom wall electrical connection.
Herein, the conflict refers to that the external connection end 111 of the first pin 110 and the bottom wall of the first link slot 310 connect
Touching, and deformation occurs afterwards by certain power (bonding force of hot melt cushion rubber 200) for the external connection end 111 of the first pin 110, second
The external connection end 121 of pin 120 is contacted with the bottom wall of the second link slot 320, and the external connection end 121 of second pin 120 is by one
Deformation occurs afterwards for fixed power (heating the bonding force of cushion rubber 200).What the way of contact of the conflict can ensure to be in electrical contact
Stability.
When producing the circuit board 300 in the present embodiment, partial insulative layer can be removed, so that being removed region and circuit
The metal layer of plate 300 forms the first link slot 310 and the second link slot 320.It should be noted that circuit board 300 includes at least
Insulating layer and fixed metal layer is bonded with insulating layer, hot melt cushion rubber 200 be adhesively fixed on insulating layer and touch-switch 100 it
Between.In such cases, the surface of metal layer towards insulating layer includes the bottom wall and the second link slot 320 of the first link slot 310
Bottom wall.In actual process, the first link slot 310 and the second link slot 320 can be formed by etch process.
Certainly, it realizes the bottom wall of the first link slot 310 and the bottom wall of the second link slot 320 is that the structure for being electrically connected bottom wall has
A variety of, described upper section is only a kind of feasible mode.
It should be noted that, although the bottom wall of the first link slot 310 and the bottom wall of the second link slot are located at same metal layer,
But between the two can there is no direct electrical connections, this programme to focus on, the external connection end 111 of the first pin 110 with
The bottom wall of first link slot 310 is by realizing electrical connection, the external connection end 121 of second pin 120 and the second link slot 320 after contradicting
Bottom wall by contradict after realize electrical connection.
In circuit board assemblies disclosed by the embodiments of the present invention, offered on circuit board 300 respectively with the first pin 110 and
Two pins 120 opposite the first link slot 310 and the second link slot 320, during assembling, hot melt cushion rubber 200 can be pre-
It is first installed on touch-switch 100, then will heat after the entirety that cushion rubber 200 and touch-switch 100 are formed is attached to circuit board 300
Heated, at the same ensure the conflict between the external connection end 111 of the first pin 110 and the bottom wall of the first link slot 310 with
And second pin 120 external connection end 121 and the second link slot 320 bottom wall between conflict, it is final to realize 100 court of touch-switch
To circuit board 300 surface and circuit board 300 plate face between by heat cushion rubber 200 be adhesively fixed.Due to heating cushion rubber 200
It is laid around the first pin 110 and second pin 120, and is bonded in the surface opposite with circuit board 300 of touch-switch 100 again
Between, thus realize to 100 waterproof of touch-switch under the premise of, without on the circuit board 300 reserve dispensing needed for space,
Also would not increasing circuit plate 300 width, be conducive to reduce circuit board assemblies occupied space.
In addition, only being needed during heating cushion rubber 200 and heating by touch-switch 100, hot melt cushion rubber 200 and circuit board
300 black boxes (black box obtains circuit board assemblies after eventually passing through heat treatment) formed are put into heating furnace,
For reflow soldering, the operating temperature of heating furnace is lower, requires material high temperature resistance used in circuit board assemblies
It is lower, for paster technique installation touch-switch needs to process in reflow soldering, electricity disclosed by the embodiments of the present invention
Road board group part can undoubtedly reduce the processing cost of circuit board assemblies.
In addition, also needing additionally to carry out a glue process using the touch-switch 100 that paster technique is installed, point glue process is more difficult
Operation, it is more demanding and time-consuming and laborious to the dispensing operation of worker, and circuit board assemblies disclosed by the embodiments of the present invention are direct
Waterproof bonding is realized by the hot melt fusing of cushion rubber 200, it is obvious that this is conducive to the production and processing of circuit board assemblies, and then can mention
High efficiency.
Hot melt cushion rubber 200 finally realizes being adhesively fixed for touch-switch 100 and circuit board 300, hot glue glue after heating
Circle 200 is located between the two, and hot melt cushion rubber 200 can be square box structure part, circular frame structural member etc., and hot melt cushion rubber 200 is logical
It is often unanimous on the whole with the edge shape of touch-switch 100, as shown in Figure 6 and Figure 7.
In the embodiment of the present invention, circuit board 300 can be flexible circuit board, base of the circuit board 300 as circuit board assemblies
Plinth component, flexible circuit board has good deformation nature, therefore is conducive to whole circuit board assemblies using flexible circuit board
It installs in a smaller space.Certainly, in circuit board assemblies disclosed by the embodiments of the present invention, circuit board 300 can also be using hard
Matter circuit board or rigid-flexible circuit board.The embodiment of the present invention does not limit the specific type of circuit board 300.
In the embodiment of the present invention, touch-switch 100 can be contact touch-switch.In a kind of specific embodiment,
Touch-switch 100 may include insulator foot 130, and the first pin 110 and second pin 120 are each attached on insulator foot 130.
Specifically, insulator foot 130 can be plastic base, the first pin 110 and second pin 120 can be consolidated by way of injection molding
It is scheduled on insulator foot 130.
Touch-switch 100 disclosed by the embodiments of the present invention can also include metal clips 140, and the setting of metal clips 140 exists
On insulator foot 130, metal clips 140 is located at the inscribed end 112 of the first pin 110 and the inscribed end of second pin 120
122, be pressurized when, metal clips 140 occur elastic deformation, and then with the inscribed end 112 of the first pin 110 and second pin
120 inscribed end 122 contacts, and then that realizes between the first pin 110 and second pin 120 indirect is electrically connected.
Hot melt cushion rubber 200 can be assembled on touch-switch 100 using various ways positioning, a kind of specific embodiment
In, boss 131 can be set on the bottom end (being closer to one end of circuit board 300) of insulator foot 130, heated cushion rubber
200 are socketed in the outside of boss 131, and the micro-deformation by heating cushion rubber 200 is fixed on the outside of boss 131.
Certainly, other mounting structures can also be set on touch-switch 100 come realize hot melt cushion rubber 200 pre-installation,
For example, can offer card slot on insulator foot 130, the top of hot melt cushion rubber 200 can be installed by way of connecting and fixing
On insulator foot 130, and then realize pre-assembled with touch-switch 100.
First pin 110 and second pin 120 play the role of being electrically connected with circuit board 300, the first pin 110 and second
There are many structures of pin 120.During actual electrical connection, the first pin 110 is contacted with the bottom wall of the first link slot 310
Realize electrical connection, second pin 120 contacts realization electrical connection with the bottom wall of the second link slot 320.In order to enable electrical connection is more
Stablize, in preferred scheme, the external connection end 111 of the first pin 110 may include the depth direction extension along the first link slot 310
First segment 1101 and be connected with first segment 1101 and along the bottom wall of the first link slot 310 extend second segment 1102, second segment
1102 contact with the bottom wall of the first link slot 310.First pin 110 of above structure can be connected by second segment 1102 and first
The bottom wall of access slot 310 realizes greater area of contact, and then can be further improved electric between the first pin 110 and circuit board 300
The stability of connection.In preferred scheme, second segment 1102 can be perpendicular with first segment 1101.
As a same reason, the external connection end 121 of second pin 120 may include the depth direction extension along the second link slot 320
Third section 1201 and be connected with third section 1201 and along the bottom wall of the second link slot 320 extend the 4th section 1202, the 4th
Section 1202 is contacted with the bottom wall of the second link slot 320.Similarly, second pin 120 is enabled to connect with second for the 4th section 1202
The bottom wall of slot 320 realizes greater area of contact, and then can be further improved and be electrically connected between second pin 120 and circuit board 300
The stability connect.
In a kind of specific embodiment, the first pin 110 and second pin 120 can be integral type metalwork, first
Pin 110 and second pin 120 are fixed on insulator foot 130 by injection molding.The external connection end 111 and second of first pin 110
The external connection end 121 of pin 120 can be bending end, i.e., by the end of integrated metal part by being bent to form.
Multiple touch-switch 100, each touch-switch 100 can be laid in actual assembling process, on circuit board 300
A key can be corresponded to.In a kind of specific embodiment, multiple touch-switch 100 along circuit board 300 extension side
To successively equipment.In such cases, circuit board 300 is stripe board, circuit board used in the key advantageous as mobile terminal.
Certainly, circuit board assemblies disclosed by the embodiments of the present invention are not limited to circuit used in the key as mobile terminal
Board group part is also used as the circuit board assemblies of other function elements in mobile terminal.
Based on circuit board assemblies disclosed by the embodiments of the present invention, the embodiment of the present invention discloses a kind of mobile terminal, disclosed
Mobile terminal include circuit board assemblies described above.
Disclosed mobile terminal can be the equipment such as mobile phone, tablet computer, E-book reader, wearable device, this
The specific type of inventive embodiments not limiting mobile terminal.
Based on circuit board assemblies disclosed by the embodiments of the present invention, the embodiment of the present invention discloses a kind of preparation of circuit board assemblies
Method, please also refer to Fig. 1-Fig. 7, disclosed preparation method includes：
Step 1: hot melt cushion rubber 200 is mounted on touch-switch 100.
This step is by the Automatic manual transmission relationship between hot melt cushion rubber 200 and touch-switch 100, pre- group for realizing the two
Dress.It realizes there are many hot melt cushion rubber 200 and the pre-assembled fit systems of touch-switch 100, for example, as described above, touching out
Closing 100 includes insulator foot 130, and boss 131 can be set on insulator foot 130, and the top of hot melt cushion rubber 200 can be socketed
It is located in except boss 131.
Touch-switch 100 includes the first pin 110 and second pin 120, and the first pin 110 and second pin 120 are used
It is electrically connected in circuit board 300.After hot melt cushion rubber 200 and touch-switch 100 are completed, the first pin 110 and second draws
Foot 120 is respectively positioned within hot melt 200 area defined of cushion rubber.
Step 2: opening up the first link slot 310 and the second link slot 320 on the circuit board 300.
This step can form the first link slot 310 and the second link slot 320 by etch process.First link slot
310 is positioned opposite with the first pin 110, and the second link slot 320 and second pin 120 are positioned opposite.
In the present embodiment, step 1 can carry out simultaneously with step 2, and step 1 can be carried out prior to step 2, step
Two can also carry out prior to step 1.The present embodiment does not limit the successive progress sequence of step 1 and step 2.
Step 3: be integrally placed to what touch-switch 100 and hot melt cushion rubber 200 were assembled on circuit board 300, so that the
The external connection end 111 of one pin 110 protrudes into the first link slot 310 and the external connection end 121 of second pin 120 protrudes into the second connection
In slot 320.
This step 3 may be considered the process tentatively assembled, prepare for step four described hereinafter.Usual feelings
Under condition, as long as making touch-switch 100 by pressure described in step 4, so that the external connection end 111 and first of the first pin 110
The bottom wall conflict of link slot 310 and the external connection end 121 of second pin 120 are contacted with the bottom wall of the second link slot 320 can be real
The purpose of the existing embodiment of the present invention.
In the actual operation process, due to the presence of hot melt cushion rubber 200, after step 3 completion, touch-switch 100
Under the supporting role of hot melt cushion rubber 200, the insulator foot 130 of touch-switch 100 and the distance between the plate face of circuit board 300
For first distance, the distance between bottom wall of the external connection end 111 of the first pin 110 and the first link slot 310 and second pin 120
External connection end 121 and the distance between the bottom wall of the second link slot 320 be second distance.First distance needs are greater than or equal to
Second distance, such situation, after touch-switch 100 could be made to be pressurized, in insulator foot 130 also not by circuit board 300
Under the inhibition of insulator foot 130, the external connection end 111 of the first pin 110 and the external connection end of second pin 120 are enabled to
121 contact with the generation of the bottom wall of the bottom wall of the first link slot 310 and the second link slot 320 respectively.
Based on this, in preferred scheme, touch-switch 100 is integrally placed to circuit board 300 with what hot melt cushion rubber 200 formed
On, cushion rubber 200 is heated between touch-switch 100 and circuit board 300, the insulator foot 130 and circuit board of touch-switch 100
The distance between 300 plate face is first distance, between the external connection end 111 of the first pin 110 and the bottom wall of the first link slot 310
Distance and the external connection end 121 and the distance between the bottom wall of the second link slot 210 of second pin 120 be second distance,
One distance is greater than second distance.In such cases, when being under pressure, the external connection end 111 and of the first pin 110 could be made
The external connection end 121 of two pins 120 obtains better pre- close contact.That is, after step 3 completion, insulator foot 130
The width that gap a is formed by between circuit board 300 is the first width, and the external connection end 111 of the first pin 110 is connect with first
The width of gap b between the bottom wall of slot 310 is the second width, the external connection end 121 of second pin 120 and the second link slot 320
Bottom wall between gap c width be third width, the second width and third width are generally equal, and the first width is preferably greater than
Second width and third width.
Step 4: making it be affixed to the pressure of circuit board 300 application of touch-switch 100, so that the first pin 110 is outer
Connect the bottom of the bottom wall conflict at end 111 and the first link slot 310 and the external connection end 121 of second pin 120 and the second link slot 320
Wall contradicts.
The entirety that the step 4 generallys use fixture clamping touch-switch 100, hot melt cushion rubber 200 and circuit board 300 are formed
Component, the pressure may be considered precompression, can to heat cushion rubber 200 be pressed in touch-switch 100 and circuit board 300 it
Between, finally make touch-switch 100 close to circuit board 300, so that the external connection end 111 of the first pin 110 is connect with first
The bottom wall of slot 310 contradicts, and the bottom wall of the external connection end 121 of second pin 120 and the second link slot 320 contradicts.In such cases, exist
Under the action of pressure, the bottom wall of the external connection end 111 of the first pin 110 and the first link slot 310 and second pin 120 it is external
It is steadily contacted between end 121 and the bottom wall of the second link slot 320.Step 4 is that following heat treatment is prepared.
Step 5: touch-switch 100, hot melt cushion rubber 200 and circuit board 300 are formed in the state that pressure is kept
Black box be put into high temperature furnace and heated so that hot melt cushion rubber 200 is bonded touch-switch 100 and circuit board 300.
The operating temperature of high temperature furnace is lower than Reflow Soldering road, and the heating of high temperature furnace enables to hot melt cushion rubber 200 to heat, in turn
It is set to play bonding effect, final realize is led on touch-switch 100 towards the plate face of the surface of circuit board 300 and circuit board 300
Hot melt adhesive circle 200 is crossed to be adhesively fixed.In such cases, due to heat cushion rubber 200 bonding effect, the first pin 110 it is external
The external connection end 121 of end 111 and second pin 120 keeps the state pre-tightened to contradict in the bottom wall of the first link slot 310 and the respectively
On the bottom wall of two link slots 320.
Before step 5 implementation, in the state of being kept by pressure, operator can press the gold of touch-switch 100
Belong to the on-off performance that elastic slice 140 tests touch-switch 100 at this pressure in advance.
Step 6: cooling down to the black box after heat treatment, circuit board assemblies are obtained.
Black box after heating is cooled down, circuit board assemblies are obtained.Due to the heat of material during cooling
Swollen shrinkage phenomenon, will lead to circuit board assemblies and undesirable stress occurs.In order to avoid these stress generate harm to circuit board assemblies,
Possibly even caused touch-switch 100 loosens, in preferred scheme, step 6 can pressure is kept in a state that,
Circuit board assemblies are cooled down.Since the effect of external pressure can be avoided the damage that stress generates in cooling procedure, keep away
Exempt to heat cushion rubber 200 it is cooling after touch-switch 100 that may be present with circuit board 300 loosen the phenomenon separated, it is smaller to stress
Pressure can be cancelled when to a certain extent, it is ensured that the connection effect of circuit board assemblies in cooling procedure.
Emphasis describes the difference between each embodiment, difference between each embodiment in foregoing embodiments of the present invention
As long as optimization feature non-contradiction, can combine to form more preferably embodiment, it is contemplated that style of writing is succinct, then no longer superfluous at this
It states.
The above description is only an embodiment of the present invention, is not intended to restrict the invention.For those skilled in the art
For, the invention may be variously modified and varied.All any modifications made within the spirit and principles of the present invention are equal
Replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of circuit board assemblies, which is characterized in that including touch-switch (100), cushion rubber (200) and circuit board (300) are heated,
The touch-switch (100) includes the first pin (110) and second pin (120), and the hot melt cushion rubber (200) is mounted on described
On touch-switch (100), first pin (110) and the second pin (120) are located at the hot melt cushion rubber (200) and are enclosed
At region among, first link slot (310) opposite with first pin (110) is provided on the circuit board (300)
Second link slot (320) opposite with the second pin (120), towards the circuit board on the touch-switch (100)
(300) surface and the plate face of the circuit board (300) are adhesively fixed by the hot melt cushion rubber (200), first pin
(110) external connection end (111) contradict on the bottom wall of first link slot (310) and with first link slot (310)
Bottom wall electrical connection, the external connection end (121) of the second pin (120) contradict on the bottom wall of second link slot (320) and
It is electrically connected with the bottom wall of second link slot (320).
2. circuit board assemblies according to claim 1, which is characterized in that the circuit board (300) is flexible circuit board.
3. circuit board assemblies according to claim 1, which is characterized in that the touch-switch (100) includes insulator foot
(130), first pin (110) and the second pin (120) are each attached on the insulator foot (130), described exhausted
The bottom end of edge pedestal (130) is provided with boss (131), and hot melt cushion rubber (200) is socketed in the outside of the boss (131).
4. circuit board assemblies according to claim 1, which is characterized in that the external connection end (111) of first pin (110)
Including along first link slot (310) depth direction extension first segment (1101) and with the first segment (1101) hold in the mouth
The second segment (1102) for connecing and extending along the bottom wall of first link slot (310)；And/or the second pin (120)
External connection end (121) include along second link slot (320) depth direction extend third section (1201) and with the third
Section (1201) is mutually connected and along the 4th section (1202) of the extension of the bottom wall of second link slot (320).
5. circuit board assemblies according to claim 1, which is characterized in that the circuit board (300) include insulating layer and with
The metal layer of the insulating layer fitting, the hot melt cushion rubber (200) are bonded with the insulating layer, first link slot (310)
Bottom wall and the bottom wall of second link slot (320) be respectively positioned on the metal layer.
6. circuit board assemblies according to claim 1, which is characterized in that the touch-switch (100) is multiple, Duo Gesuo
The extending direction that touch-switch (100) is stated along the circuit board (300) is set gradually.
7. a kind of mobile terminal, which is characterized in that including circuit board assemblies of any of claims 1-6.
8. a kind of preparation method of circuit board assemblies, which is characterized in that including：
Hot melt cushion rubber (200) is mounted on touch-switch (100) and opens up the first link slot on circuit board (300)
(310) and the second link slot (320), the touch-switch (100) includes the first pin (110) and second pin (120), described
First pin (110) and the second pin (120) are located within hot melt cushion rubber (200) area defined；
The circuit board (300) are integrally placed to by what the touch-switch (100) and hot melt cushion rubber (200) were assembled into
On, so that the external connection end (111) of first pin (110) protrudes into first link slot (310) and described second draws
The external connection end (121) of foot (120) protrudes into second link slot (320)；
Applying to the touch-switch (100) makes it be affixed to the pressure of the circuit board (300), so that first pin
(110) bottom wall of external connection end (111) and first link slot (310) contradict and the second pin (120) it is external
The bottom wall of (121) and second link slot (320) is held to contradict；
In the state that the pressure is kept, by the touch-switch (100), the hot melt cushion rubber (200) and the circuit
The black box of plate (300) composition is put into high temperature furnace and is heated, so that the touch-switch (100) is towards the electricity
The plate face of road plate (300) and the plate face of the circuit board (300) are adhesively fixed by the hot melt cushion rubber (200)；
The black box after heat treatment is cooled down, the circuit board assemblies are obtained.
9. preparation method according to claim 8, which is characterized in that by heat treatment after the black box into
Row cooling, including：
In the state that the pressure is kept, the black box after heat treatment is cooled down.
10. preparation method according to claim 8, which is characterized in that by the touch-switch (100) and the hot melt adhesive
What circle (200) was assembled into is integrally placed on the circuit board (300), so that the external connection end (111) of first pin (110)
It protrudes into first link slot (310) and the external connection end (121) of the second pin (120) protrudes into second link slot
(320) in, including：
It is integrally placed to what the touch-switch (100) and hot melt cushion rubber (200) formed on the circuit board (300),
So that first distance is greater than second distance, wherein the hot melt cushion rubber (200) is located at the touch-switch (100) and the electricity
Between road plate (300), the first distance is insulator foot (130) and the circuit board (300) of the touch-switch (100)
The distance between plate face, the bottom wall of the external connection end (111) of first pin (110) and first link slot (310) it
Between distance and the second pin (120) external connection end (121) and second link slot (320) the distance between bottom wall
It is the second distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810667009.6A CN108925039B (en) | 2018-06-25 | 2018-06-25 | Mobile terminal, circuit board assembly and preparation method of circuit board assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810667009.6A CN108925039B (en) | 2018-06-25 | 2018-06-25 | Mobile terminal, circuit board assembly and preparation method of circuit board assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108925039A true CN108925039A (en) | 2018-11-30 |
| CN108925039B CN108925039B (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810667009.6A Active CN108925039B (en) | 2018-06-25 | 2018-06-25 | Mobile terminal, circuit board assembly and preparation method of circuit board assembly |
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| CN (1) | CN108925039B (en) |
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| CN108925039B (en) | 2020-05-12 |
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