CN204607289U - Flexible circuit board reeling-up reeling-out device - Google Patents

Abstract

A flexible circuit board unwinding device, comprising a flexible circuit board and a unwinding mechanism, the flexible circuit board is fixed on the unwinding mechanism and can be rewound by means of the unwinding mechanism or pulled out at both ends for electrical connection For electronic components, there are multiple cooling holes on the flexible circuit board to provide gas to pass through the flexible circuit board to achieve heat dissipation. A gas convection space is provided to achieve heat dissipation. In addition, at least one of a first casing and a second casing of the unwinding mechanism includes a heat sink as a heat dissipation mechanism of the unwinding mechanism.

Description

Flexible printed circuit board unwinding device

technical field

The utility model relates to a rolling and unwinding device, in particular to a flexible circuit board rolling and unwinding device.

Background technique

As disclosed in Chinese Utility Model Patent Application No. CN201420226959.2, there is a flexible printed circuit board unwinding device. The unwinding device is to place the flexible printed circuit board on a turntable between an upper casing and a lower casing. And it cooperates with a scroll spring to achieve the mechanism that the flexible circuit board can be rolled up and both ends can be pulled out.

This type of unwinding device operates by electrically connecting the two ends of the flexible circuit board to two electronic components. However, the process of electrically connecting the two electronic components to the flexible circuit board is usually accompanied by heat generation. On the other hand, , also because the part of the flexible circuit board that has not been pulled out is still wound on the turntable, therefore, it is easy to have heat energy that is not easy to dissipate from the wound part of the flexible circuit board, which will cause the temperature of the flexible circuit board to rise, which will affect the work. performance, and even burn issues.

Utility model content

In order to solve the aforementioned problem of difficult heat dissipation, the purpose of the present invention is to provide a flexible circuit board rolling and unwinding device with a heat dissipation mechanism.

Further, the utility model provides a flexible circuit board rolling and unwinding device, which includes a flexible circuit board with cooling holes.

Further, the utility model provides a flexible circuit board rolling and unwinding device, which includes a rolling and unwinding mechanism with a heat dissipation structure.

The flexible circuit board unwinding device of the utility model comprises a flexible circuit board provided with a plurality of cooling holes; a unwinding mechanism comprising: a first shell provided with a plurality of first heat sinks; a second The casing is combined with the first casing and defines a first outlet and a second outlet on opposite sides; and a reel set is rotatably arranged on the first casing and the first casing. Between the second housing, the reel set provides the flexible circuit board to be wound; when the flexible circuit board is wound on the unwinding mechanism, the middle part of the flexible circuit board is fixed on the reel set, and the flexible circuit board is fixed on the reel set. Both ends of the flexible circuit board protrude outward from the first wire outlet and the second wire outlet respectively, and the cooling holes of each flexible circuit board overlap and communicate in a radial direction of the reel set.

Furthermore, the flexible circuit board includes a circuit board body, and the heat dissipation holes are arranged in at least one row along a length direction of the circuit board body.

Furthermore, in the same row of heat dissipation holes, the distance between two adjacent heat dissipation holes gradually increases from the middle of the flexible circuit board to both ends.

Furthermore, in the heat dissipation holes in the same row, the distance between two adjacent heat dissipation holes is the circumference of the flexible circuit board wound around the reel set at the two heat dissipation holes divided by the flexible circuit board The value of the number of cooling holes distributed around the reel group.

Further, the first housing includes a first base wall and at least two first connecting posts extending from the first base wall toward the second housing, the first base wall has a The first outer surface of the body, each of the first cooling fins is disposed on the first outer surface of the first base wall.

Furthermore, the first casing further includes a plurality of first ventilation holes penetrating through the first base wall.

Furthermore, a first groove is defined between two adjacent first cooling fins, each of the first ventilation holes is located in each of the first grooves, and each of the first ventilation holes is parallel to the first groove. An axial direction of the reel set runs through the first base wall.

Furthermore, the second casing includes a second base wall, at least two second connecting columns extending from the second base wall toward the first casing, and a plurality of second cooling fins, each of the first The connecting column is correspondingly engaged with each of the second connecting columns to define the first outlet and the second outlet, the second base wall has a second outer surface facing away from the first housing, and each of the first Two cooling fins are disposed on the second outer surface of the second base wall.

Furthermore, the reel set includes a shaft, a sleeve and a return spring, the shaft is fixed between the first casing and the second casing, the sleeve rotatably surrounds the shaft, The flexible circuit board is wound around the sleeve, and the return spring has an inner end fixed to the shaft and an outer end fixed to the sleeve.

Furthermore, each of the heat dissipation holes is strip-shaped, and the long axis direction of each strip-shaped heat dissipation hole is parallel to the length direction of the circuit board body.

The beneficial effect of the utility model is that: by virtue of the heat dissipation holes of the flexible circuit board, the flexible circuit board itself has a heat dissipation mechanism to avoid heat accumulation. In addition, the setting of the heat sink and the ventilation hole of the winding mechanism It also helps to dissipate the heat generated by the flexible circuit board.

Description of drawings

Other features and effects of the present utility model will be clearly presented in the detailed description of the embodiments with reference to the drawings, wherein:

Fig. 1 is a perspective view of an embodiment of the flexible circuit board unwinding device of the present invention;

Fig. 2 is a perspective view of the embodiment shown in Fig. 1, and the two ends of the flexible circuit board are pulled out;

Fig. 3 is an exploded view of a retracting mechanism of the embodiment of the flexible circuit board unwinding device of the present invention;

4 is a perspective view of a first housing of the retracting mechanism of the embodiment of the flexible circuit board unwinding device of the present invention;

5 is a perspective view of a second housing of the retracting mechanism of the embodiment of the flexible circuit board unwinding device of the present invention;

Fig. 6 is a side view of the embodiment of the flexible circuit board unwinding device of the present invention;

Fig. 7 is a sectional view cut along the VI-VI direction of Fig. 6; and

Fig. 8 is a side view from another direction of the embodiment of the flexible circuit board unwinding device of the present invention.

[Description of main component symbols]

100 flexible printed circuit board unwinding device

1 flexible circuit board

11 Circuit board body

12 ports

13 cooling holes

113 clamping section

2 roll unwinding mechanism

21 First shell

211 First base wall

212, 213 The first connecting column

214 First Outer Side

215 First heat sink

216 First ventilation hole

217 First Groove

22 Second housing

221 Second base wall

222, 223 Second connecting column

224 second outer side

225 second heat sink

226 2nd ventilation hole

227 Second Groove

23 reel set

230 Socket cover

231 shaft

232 sleeve

233 return spring

234 inner end

235 outer end

236 bottom wall

24 The first outlet

25 Second outlet

L Length direction

Detailed ways

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to Fig. 1 and Fig. 2, one embodiment of the flexible circuit board unwinding device 100 of the present invention includes a flexible circuit board 1 and a unwinding mechanism 2, and the middle part of the flexible circuit board 1 is combined and fixed on the unwinding mechanism 2 and can be retracted by means of the unwinding mechanism 2 (as shown in FIG. 1 ) or pulled out at both ends (as shown in FIG. 2 ) to be electrically connected between two electronic components (not shown in the figure). Among them, the flexible printed circuit board rolling and unwinding device 100 of the present invention works in the retracted state as shown in FIG. 1 , so it is particularly important to improve the heat dissipation of the flexible printed circuit board 1 .

Specifically, the flexible circuit board 1 includes a strip-shaped circuit board body 11, two connecting ports 12 respectively arranged at two ends of the circuit board body 11, and a plurality of cooling holes 13 arranged on the circuit board body 11. The cooling holes 13 may be arranged in at least one row along a length direction L of the circuit board body 11 , and the cooling holes 13 shown in this embodiment are arranged in two rows along the length direction L.

Referring to Fig. 3 and Fig. 4, the unwinding mechanism 2 includes a combined first casing 21, a second casing 22, and a reel group 23 arranged between the first casing 21 and the second casing 22 . Specifically, the first housing 21 of this embodiment includes a first base wall 211 , two pairs of first connecting columns 212 , 213 , a plurality of first cooling fins 215 , and a plurality of first ventilation holes 216 . Two pairs of first connecting columns 212 , 213 extend and protrude from the same side surface of the first base wall 211 in the same direction, and each pair of first connecting columns 212 , 213 is spaced apart from each other. In this embodiment, the first base wall 211 has a first outer surface 214 facing away from the second housing 22 , the first cooling fins 215 are located on the first outer surface 214 , and between two adjacent first cooling fins 215 Define a first groove 217, each of the first ventilation holes 216 runs through the first base wall 211 and is located in the first groove 217, the first ventilation holes 216 are preferably along an axial direction of the parallel reel set 23 through the first base wall 211 .

Referring to FIG. 3 and FIG. 5 , the second housing 22 of this embodiment includes a second base wall 221 , two pairs of second connecting columns 222 , 223 , a plurality of second cooling fins 225 and a plurality of second ventilation holes 226 . Two pairs of second connecting posts 222 , 223 protrude from the same side of the second base wall 221 in the same direction, and each pair of second connecting posts 222 , 223 are spaced apart from each other. In this embodiment, the second base wall 221 has a second outer surface 224 facing away from the first casing 21, the second cooling fins 225 are located on the second outer surface 224, and between two adjacent second cooling fins 225 A second groove 227 is defined, and each of the second ventilation holes 226 runs through the second base wall 221 and is located in the second groove 227. The second ventilation holes 226 may pass through along an axial direction of the parallel reel set 23 the second base wall 221 .

Regarding the first housing 21 and the second housing 22 , in other variations, only the first housing 21 may be provided with the first heat sink 215 .

Referring to FIGS. 1 to 3 , the first housing 21 forms a housing assembly by connecting its two pairs of first connecting columns 212 , 213 to the ends of two pairs of second connecting columns 222 , 223 of the second housing 22 . , and two pairs of first connecting posts 212, 213 and second connecting posts 222, 223 connected at the ends define a first outlet 24 and a second outlet 25 located on opposite sides of the housing assembly, providing a circuit board Both ends of the body 11 protrude.

Referring to FIG. 3 , FIG. 6 , and FIG. 7 , the reel set 23 is rotatably disposed between the first housing 21 and the second housing 22 to provide the flexible circuit board 1 to be wound. Specifically, the reel set 23 of this embodiment includes a shaft member 231, a sleeve 232, a return spring 233 and a sleeve cover 230. The shaft 231 passes through the sleeve 232 and is fixed between the first base wall 211 of the first housing 21 and the second base wall 221 of the second housing 22 . The sleeve 232 is hollow and surrounds the shaft 231 and is rotatably disposed between the first base wall 211 of the first housing 21 and the second base wall 221 of the second housing 22 . In this embodiment, the sleeve 232 has a bottom wall 236 , and the shaft 231 passes through the bottom wall 236 of the sleeve 232 . In this embodiment, the return spring 233 is a scroll spring in the form of a plate, which is accommodated in the sleeve 232 and has an inner end 234 fixed to the shaft 231 and an outer end 235 fixed to the sleeve 232, thereby, When the sleeve 232 rotates, the restoring spring 233 is twisted and compressed to accumulate restoring force. The sleeve cover 230 covers the open end of the sleeve 232 opposite to the bottom wall 236 to prevent the return spring 233 from detaching from the sleeve 232 , and the shaft member 231 also passes through the sleeve cover 230 .

The flexible circuit board 1 is fixed to the sleeve 232 with a fastening section 113 in the middle of the circuit board body 11, and the two ends of the flexible circuit board 1 respectively protrude from the first outlet 24 and the second The wire outlet 25 , and the part of the circuit board body 11 that does not protrude from the first wire outlet 24 and the second wire outlet 25 is wound around the periphery of the sleeve 232 layer by layer from inside to outside. It is worth noting that, by virtue of the heat dissipation holes 13 provided in the circuit board body 11, this embodiment provides a path for the airflow to pass through the circuit board body 11 to take away heat energy, so that the flexible circuit board 1 itself has the ability to dissipate heat. mechanism, and especially when the circuit board body 11 is still mostly wound on the periphery of the sleeve 232 layer by layer when the circuit board body 11 is electrically connected, each of the heat dissipation holes 13 overlaps and communicates in the radial direction of the reel set 23 ( As shown in Figure 7), a structure such as a through hole is formed, so that the part of the sleeve 232 that is wrapped around the sleeve 232 has each of the overlapped and communicated heat dissipation holes 13. The structure similar to the through hole can provide a space for gas convection, which in turn helps The heat energy generated when the circuit board body 11 is energized is dissipated to avoid accumulation of heat energy which may affect the working performance and even cause burning.

As shown in Figure 7, since the circuit board body 11 is wound on the periphery of the sleeve 232 layer by layer, the diameter and circumference of the increased winding layers are gradually increased in accordance with the number of winding layers, located on the same row of the circuit board body 11. The distance between two adjacent cooling holes 13 can be set to gradually increase from the middle of the flexible circuit board 1 toward the two ends of the circuit board body 11 . More specifically, the distance between two adjacent heat dissipation holes 13 in the same row of the flexible circuit board 1 is roughly equal to the circumference of the flexible circuit board 1 wound around the reel set 3 at the two heat dissipation holes 13 divided by the flexible circuit board 1 . The value of the number of heat dissipation holes 13 distributed by the circuit board 1 around the winding reel group 3 (in this embodiment, 6 heat dissipation holes 13 as shown in Figure 7), so as to ensure that the circuit board body 11 is wound smoothly due to layer by layer winding. When the winding circumference gradually increases, the overlapping and communicating state of the cooling holes 13 can still be maintained. When the utility model is applied to a flexible circuit board with fewer winding layers, since the winding diameter or winding circumference changes less, the distance between two adjacent cooling holes in the same row can be set are approximately equal (not shown). In addition, the heat dissipation holes 13 provided on the circuit board body 11 can be in the shape of a long strip whose long axis is parallel to the longitudinal direction L, which also helps to ensure that the heat dissipation holes 13 on the outer layer can be At least a part overlaps and communicates with the heat dissipation holes 13 of the inner layer.

In addition to the aforementioned heat dissipation holes 13 of the flexible circuit board 1, this embodiment relies on the first and second heat sinks 215, 225 and the first and second ventilation holes of the first housing 21 and the second housing 22 The arrangement of 216 and 226 (for example, Fig. 8 shows one side of the second casing 22 as an example) also helps to provide a path for heat dissipation gas convection, and provides the part where the flexible circuit board 1 is wound on the reel set 23 The effect of ventilation is to assist in dissipating the heat energy generated during the operation of the flexible printed circuit 1 . The rolling and unwinding mechanism 2 can also be made of a material with better thermal conductivity, such as metal, which is more conducive to the heat dissipation of the overall structure.

To sum up, the flexible printed circuit board unwinding device of the present invention relies on the cooling holes 13 provided on the printed circuit board body 11 to provide the flexible printed circuit board 1 itself with a heat dissipation mechanism, especially when the printed circuit board body 11 is wound on When the sleeve 232 is used, the space for gas convection is provided by virtue of the heat dissipation holes 13 being overlapped and communicated to avoid heat accumulation on the wound circuit board body 11. In addition, the first and second heat dissipation fins 215, 225 of the unwinding mechanism 2 1. The setting of the first and second ventilation holes 216, 226 also helps to dissipate the heat energy generated by the flexible circuit board 1, so the purpose of the present utility model can indeed be achieved.

Only those described above are only embodiments of the present utility model, and the scope of implementation of the present utility model cannot be limited with this, that is, all simple equivalent changes and modifications made according to the patent scope of the utility model and the content of the patent specification , all still belong to the scope that the utility model patent covers.

Claims (10)

1. A flexible printed circuit board winding device, characterized in that it comprises: A flexible circuit board is provided with a plurality of cooling holes; A roll unwinding mechanism consisting of: A first shell, provided with a plurality of first heat sinks; a second casing, combined with the first casing, and defining a first outlet and a second outlet on opposite sides; and a reel set, rotatably arranged between the first casing and the second casing, the reel set provides the flexible circuit board to be wound; When the flexible circuit board is wound on the unwinding mechanism, the middle part of the flexible circuit board is fixed on the reel group, and the two ends of the flexible circuit board are separated from the first wire outlet and the second wire outlet respectively. Protruding outward, the heat dissipation holes of each flexible circuit board overlap and communicate with each other in a radial direction of the reel set. 2 . The flexible circuit board rolling and unwinding device according to claim 1 , wherein the flexible circuit board comprises a circuit board body, and each of the cooling holes is arranged in at least one row along a length direction of the circuit board body. 3 . 3. The flexible printed circuit board unwinding device according to claim 2, characterized in that, in the same row of heat dissipation holes, the distance between two adjacent heat dissipation holes is from the middle of the flexible circuit board to both ends Gradually increase. 4. The flexible printed circuit board unwinding device according to claim 3, characterized in that, in the same row of heat dissipation holes, the distance between two adjacent heat dissipation holes is that the flexible circuit board is located at the two heat dissipation holes. A value obtained by dividing the circumference of the reel group by the number of cooling holes distributed by the flexible circuit board when it is wound around the reel group. 5. The flexible printed circuit board rolling and unwinding device according to any one of claims 1 to 4, wherein the first housing comprises a first base wall and extends from the first base wall toward the second housing There are at least two first connecting columns, the first base wall has a first outer surface facing away from the second housing, and each of the first cooling fins is arranged on the first outer surface of the first base wall. 6 . The flexible circuit board rolling and unwinding device as claimed in claim 5 , wherein the first casing further comprises a plurality of first ventilation holes penetrating through the first base wall. 6 . 7. The flexible circuit board rolling and unwinding device according to claim 6, wherein a first groove is defined between two adjacent first heat sinks, and each of the first ventilation holes is located at each of the first ventilation holes. Each of the first ventilation holes penetrates the first base wall along an axial direction parallel to the reel set. 8. The flexible printed circuit board winding and unwinding device according to claim 7, wherein the second housing comprises a second base wall, at least two second base walls extending from the second base wall toward the first housing. A connecting post, and a plurality of second heat sinks, each of the first connecting posts is engaged with each of the second connecting posts correspondingly to define the first wire outlet and the second wire outlet, and the second base wall has a back Facing the second outer surface of the first housing, each of the second cooling fins is disposed on the second outer surface of the second base wall. 9. The flexible circuit board unwinding device according to any one of claims 1 to 4, wherein the reel set includes a shaft, a sleeve and a return spring, and the shaft is fixed on the first Between the casing and the second casing, the sleeve rotatably surrounds the shaft, the flexible circuit board is wound around the sleeve, and the return spring has an inner end fixed on the shaft and an outer end fixed to the sleeve. 10. The flexible printed circuit board rolling and unwinding device according to any one of claims 2 to 4, wherein each of the heat dissipation holes is elongated, and the long axis direction of each of the elongated heat dissipation holes is parallel to in the length direction of the circuit board body.