TWI381237B - Fixing device and flash assembly using same - Google Patents

Description

Fixing device and flash unit having the same

The present invention relates to a fixing device and a flash unit having the same.

Using a flash system to increase the brightness of the scene, especially in dimly lit areas, the flash will make the scene brighter. Therefore, with the rapid development of photography technology, in order to take high-quality photos, the camera and the camera function A flash unit is mounted in electronic components such as mobile phones.

Typically, the flash unit includes a flash tube having positive and negative electrodes, a reflector, a circuit board assembly, and a carrier structure. The positive and negative electrodes are located at both ends of the flash tube. The flash tube is carried on the carrying structure after being disposed on the carrying structure, and the carrying structure is fixed on the circuit board assembly. The flash tube is electrically connected to the circuit board assembly.

Generally, the flash tube and the circuit board assembly are electrically connected by means of conductive elastic welding, specifically: two conductive protrusions with a platform are mounted on the circuit board assembly by Surface Mounted Technology (SMT). The positive and negative electrodes of the flash tube are respectively soldered to the platform of the conductive elastic piece by soldering. Thus, the flash tube is electrically connected to the circuit board assembly by the conductive elastic piece. However, when the operator performs the shrapnel welding on the production line, the flash tube is often moved relative to the carrier structure for the purpose of soldering, so that the positions of the positive and negative electrodes on the platform are changed, that is, the flash tube is generated. Bias problem. Deviation of the flash tube can result in poor light output of the flash unit, such as the flash index and light distribution.

In view of the above, it is necessary to provide a fixing device capable of avoiding the offset of the flash tube and a flash unit having the same.

A fixture for securing a workpiece. The fixing device comprises a substrate, two elastic first clamping arms and second clamping arms respectively extending from two sides of the substrate. The first clamping arm includes a first connecting portion, a first limiting portion and a first supporting portion. The first connecting portion extends from the substrate, and the first connecting portion, the first limiting portion and the first supporting portion are sequentially connected. The second clamping arm includes a second connecting portion, a second limiting portion and a second supporting portion. The second connecting portion extends from the substrate, and the second connecting portion, the second limiting portion and the second supporting portion are sequentially connected. The first support portion and the second support portion are located between the first connection portion and the second connection portion. An end of the first support portion remote from the first limiting portion is opposite to the substrate. An end of the second support portion that is away from the second limiting portion is opposite to the substrate. The first limiting portion and the second limiting portion are opposite to each other and jointly abut the workpiece, and the first supporting portion and the second supporting portion are opposite to each other and jointly support the workpiece.

A flash lamp assembly includes a flash tube having positive and negative electrodes, a reflective umbrella, a trigger electrode disposed on the reflective umbrella, a circuit board assembly, and two fixtures on the circuit board assembly. The fixing device comprises a substrate, two elastic first clamping arms and second clamping arms respectively extending from two sides of the substrate. The first clamping arm includes a first connecting portion, a first limiting portion and a first a support. The first connecting portion extends from the substrate, and the first connecting portion, the first limiting portion and the first supporting portion are sequentially connected. The second clamping arm includes a second connecting portion, a second limiting portion and a second supporting portion. The second connecting portion extends from the substrate, and the second connecting portion, the second limiting portion and the second supporting portion are sequentially connected. The first support portion and the second support portion are located between the first connection portion and the second connection portion. An end of the first support portion remote from the first limiting portion is opposite to the substrate. An end of the second support portion that is away from the second limiting portion is opposite to the substrate. The first limiting portion and the second limiting portion are opposite to each other and jointly abut the positive and negative electrodes, and the first supporting portion and the second supporting portion are opposite to each other and jointly support the positive and negative electrodes to the flash tube Fixed to the board assembly. The positive and negative electrodes are located at two ends of the flash tube, and the flash tube is disposed at the reflective umbrella. The reflector is electrically connected to the circuit board assembly by the trigger electrode.

Compared with the prior art, the flash unit uses the first support portion of the fixing device to support the positive and negative electrodes together with the second support portion, and the first limiting portion and the second limiting portion together abut the The positive and negative electrodes are fixed to the flash tube. Since the degrees of freedom of the positive and negative electrodes are defined by the fixing device, the flash tube can be prevented from being misaligned, and the light effect of the flash tube is ensured.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, the flash unit 10 includes a flash tube 110, a reflector 120, a trigger electrode 130, a circuit board assembly 140, and two fixtures 150 made of a conductive material. The flash tube 110 After being worn by the reflector 120, the fixing device 150 is fixed to the circuit board assembly 140. The trigger electrode 130 is disposed on the reflector 120 and electrically connects the reflector 120 to the circuit board assembly 140. The flash tube 110 is electrically connected to the circuit board assembly 140 by the fixing device 150.

The flash tube 110 includes a body portion 112 and a positive electrode 114 and a negative electrode 116 extending from opposite ends of the body portion 112, respectively. In this embodiment, the main body portion 112, the positive electrode 114, and the negative electrode 116 are all cylindrical, and the diameters of the positive electrode 114 and the negative electrode 116 are smaller than the diameter of the main body portion 112. The flash tube 110 is filled with an inert gas having a high luminous intensity such as helium, neon or argon. In the present embodiment, the inert gas is helium.

The reflector 120 includes a loading portion 122 and a reflecting portion 124 extending from the loading portion 122. The reflecting portion 124 is divergent in a direction away from the loading portion 122. A through hole 126 is defined in each of the opposite sides of the reflecting portion 124. The flash tube 110 is disposed in the reflector 120 through the through hole 126. The light emitted by the flash tube 110 is emitted in a direction in which the reflecting portion 124 diverges. The trigger electrode 130 is attached to the loading portion 122. The reflecting portion 124 can be completely made of a reflective material. In order to reduce the cost, the reflecting portion 124 is preferably made of a non-reflective material, and a side of the flash tube 110 is coated with a reflective coating.

The circuit board assembly 140 includes a circuit board base 142, a plurality of electronic components 144 on one side of the circuit board base 142, and a flexible printed circuit board (FPCB) on the other side of the circuit board base 142. 146. The electronic component 144 is a capacitor, a resistor, a capacitor, or the like that can store electrical energy and can trigger the flash tube 110 to emit light. One end of the flexible circuit board 146 is electrically connected to the circuit board base 142, and the other end is electrically connected to other external components (not shown). The triggering electrode 130 is electrically connected to the circuit board base 142. The reflector 120 is electrically connected to the trigger electrode 130 by a wire (not shown) to electrically connect to the circuit board base 142.

Referring to FIG. 2, the fixing device 150 is made of a conductive material having a certain elasticity and plasticity, such as beryllium copper. The fixture 150 includes a substrate 152, two first clamping arms 154 and a second clamping arm 156 extending from opposite sides of the substrate 152, respectively. The substrate 152 is mounted on the circuit board substrate 142 by surface mounting techniques.

The first clamping arm 154 is substantially R-shaped and includes a first connecting portion 154a, a first limiting portion 154b and a first supporting portion 154c. One end of the first connecting portion 154a is connected to the substrate 152, and the other end is connected to one end of the first limiting portion 154b. The other end of the first limiting portion 154b is connected to one end of the first supporting portion 154c.

The shape of the second clamping arm 156 is in a mirror image relationship with the shape of the first clamping arm 154. The second clamping arm 156 includes a second connecting portion 156a, a second limiting portion 156b and a second support. Part 156c. One end of the second connecting portion 156a is connected to the substrate 152, and the other end is connected to one end of the second limiting portion 156b. The other end of the second limiting portion 156b is connected to one end of the second supporting portion 156c.

The first limiting portion 154b is disposed opposite to the second limiting portion 156b, and the first supporting portion 154c and the second supporting portion 156c are disposed opposite to each other. A receiving space 158 is for receiving the positive electrode 114 and the negative electrode 116. The first limiting portion 154b and the second limiting portion 156b are formed in an "eight" shape, and the maximum distance between the first limiting portion 154b and the second limiting portion 156b is less than or equal to the positive electrode 114. And the diameter of the negative electrode 116 to collectively resist the positive electrode 114 and the negative electrode 116. The first supporting portion 154c and the second supporting portion 156c are formed together to form an inverted "eight" shape, and the maximum distance between the first supporting portion 154c and the second supporting portion 156c is less than or equal to the positive electrode 114 and the negative The diameter of the electrode 116 supports the positive electrode 114 and the negative electrode 116 in common.

It can be understood that the first supporting portion 154c is disposed opposite to the second supporting portion 156c, but is not limited to form an inverted "eight" shape in the embodiment, and the first supporting portion 154c and the second supporting portion 156c may be For the connection, the first support portion 154c and the second support portion 156c are required to support the positive electrode 114 and the negative electrode 116. In addition, the first clamping arm 154 is not limited to the R shape in the embodiment, and may have other irregular shapes, and only needs to satisfy the positive electrode 114 and the negative electrode 116 in the receiving space 158. can. The shape of the second clamping arm 156 is not limited to being in a mirror image relationship with the shape of the first clamping arm 154. The first clamping arm 154 may be substantially R-shaped, and the second clamping arm 156 may be in other shapes. irregular shape.

Referring to FIG. 1 and FIG. 2 together, the flash unit 10 is mounted as follows: First, the substrate 152 of the fixing device 150 is mounted on the circuit board base 142 by surface mounting technology; then, the trigger electrode 130 is attached. On the loading portion 122 of the reflector 120; then, the flash tube 110 is inserted through the through hole 126 in the reflector 120; finally, the positive electrode The negative electrode 116 is inserted into the receiving space 158 of the fixing device 150 in a direction close to the circuit board base 142, and the trigger electrode 130 is electrically connected to the circuit board base 142.

The flash unit 10 operates as follows: When the circuit board base 142 is energized, since the trigger electrode 130 is electrically connected to the circuit board base 142, the trigger electrode 130 is turned on and generates a high voltage. Under the action of the high pressure, the atoms of the inert gas in the flash tube 110 lose electrons to become positive ions, and the electrons that are detached from the atoms obtain energy, so that the inert gas in the flash tube 110 is in an ionized state, and the ions move in the electric field. Since the positive electrode 114 and the negative electrode 116 are electrically connected to the circuit board assembly 140 by the fixing device 150, the positive electrode 114 and the negative electrode 116 are also turned on and introduce an applied charge to make the electron of the inert gas The ions recombine and generate a gas discharge which, when discharged, emits a momentary intense flash to achieve flashing of the flash unit 10.

The flash unit 10 and the second support portion 156c support the positive electrode 114 and the negative electrode 116 together with the first support portion 154c, and the first limiting portion 154b and the second limiting portion 156b. The flash tube 110 is fixed to the positive electrode 114 and the negative electrode 116. Since the degrees of freedom of the positive electrode 114 and the negative electrode 116 are defined by the fixing device 150, the flash tube 110 can be prevented from occurring. The offset ensures the light efficiency of the flash tube 110.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and those skilled in the art will be able to include the equivalent modifications or variations of the invention in the spirit of the invention. .

10‧‧‧ flash unit

110‧‧‧Flash tube

112‧‧‧ Body Department

114‧‧‧ positive electrode

116‧‧‧Negative electrode

120‧‧‧Reflection umbrella

122‧‧‧Loading Department

124‧‧‧Reflection Department

126‧‧‧through hole

140‧‧‧Board components

142‧‧‧Circuit board base

144‧‧‧Electronic components

146‧‧‧Flexible circuit board

130‧‧‧Trigger electrode

150‧‧‧Fixed devices

152‧‧‧Substrate

154‧‧‧First clamping arm

154a‧‧‧First connection

154b‧‧‧First Limitation Department

154c‧‧‧First support

156‧‧‧Second gripper arm

156a‧‧‧Second connection

156b‧‧‧Second Limitation

156c‧‧‧second support

158‧‧‧ accommodating space

FIG. 1 is a perspective view of a flash unit provided by the present invention.

2 is a perspective view of the fixing device of the flash unit of FIG. 1.

150‧‧‧Fixed devices

152‧‧‧Substrate

154‧‧‧First clamping arm

154a‧‧‧First connection

154b‧‧‧First Limitation Department

154c‧‧‧First support

156‧‧‧Second gripper arm

156a‧‧‧Second connection

156b‧‧‧Second Limitation

156c‧‧‧second support

158‧‧‧ accommodating space

Claims (11)

A fixing device for fixing a workpiece, wherein the fixing device comprises a substrate, two elastic first clamping arms and a second clamping arm respectively extending from two sides of the substrate, the first clamping member The holding arm includes a first connecting portion, a first limiting portion and a first supporting portion. The first connecting portion extends from the substrate, the first connecting portion, the first limiting portion and the first support The second clamping arm includes a second connecting portion, a second limiting portion and a second supporting portion. The second connecting portion extends from the substrate, the second connecting portion, the second connecting portion The limiting portion and the second supporting portion are connected in sequence, and the first supporting portion and the second supporting portion are located between the first connecting portion and the second connecting portion, and the first supporting portion is away from the first limiting portion One end of the portion is opposite to the substrate, and an end of the second supporting portion that is away from the second limiting portion is opposite to the substrate, and the first limiting portion and the second limiting portion are opposite to each other and jointly resist the workpiece. The first support portion is opposite to and co-supported with the second support portion The workpiece. The fixing device according to claim 1, wherein the first limiting portion and the second limiting portion are disposed opposite to each other to form an "eight" shape. The fixing device according to claim 1, wherein the first supporting portion and the second supporting portion are disposed opposite to each other to form an inverted "eight" shape. The fixing device of claim 1, wherein an end of the first supporting portion that is away from the first limiting portion is directly connected to an end of the second supporting portion that is away from the second limiting portion. The fixing device of claim 1, wherein the fixing device is made of a conductive material. A flash lamp assembly including a flash tube having positive and negative electrodes a reflector umbrella, a trigger electrode disposed on the reflector, a circuit board assembly and two fixing devices on the circuit board assembly, the positive and negative electrodes are located at two ends of the flash tube, and the flash tube is worn The improvement is that the fixing device comprises a substrate, two elastic first clamping arms and a second clamping arm respectively extending from two sides of the substrate, the first clamping arm comprising a a first connecting portion, a first limiting portion, and a first supporting portion. The first connecting portion extends from the substrate, and the first connecting portion, the first limiting portion and the first supporting portion are sequentially connected. The second clamping arm includes a second connecting portion, a second limiting portion and a second supporting portion. The second connecting portion extends from the substrate, the second connecting portion, the second limiting portion and The second supporting portion is connected in sequence, and the first supporting portion and the second supporting portion are located between the first connecting portion and the second connecting portion, and the end of the first supporting portion away from the first limiting portion is The substrate is opposite to the second branch An end of the portion opposite to the second limiting portion is opposite to the substrate, the first limiting portion and the second limiting portion are opposite to each other and jointly resist the positive and negative electrodes, and the first supporting portion and the second portion The support portion supports the positive and negative electrodes to fix the flash tube to the circuit board assembly, and the reflector is electrically connected to the circuit board assembly by the trigger electrode. The flash unit of claim 6, wherein the first limiting portion and the second limiting portion are disposed opposite each other to form an "eight" shape. The flash unit of claim 6, wherein the first support portion and the second support portion are disposed opposite each other to form an inverted "eight" shape. The flash unit of claim 6, wherein an end of the first support portion that is away from the first limiting portion is directly connected to an end of the second supporting portion that is away from the second limiting portion. The flash unit of claim 6, wherein the fixing The device is made of a conductive material to electrically connect the flash tube to the circuit board assembly by the fixture. The fixing device of claim 1, wherein the first clamping arm has an R shape, and the second clamping arm is in a mirror image relationship with the first clamping arm.