JPH019979Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses solid-state light-emitting elements such as light-emitting diodes and solid-state lamps (hereinafter simply referred to as light-emitting elements) to display multiple bars, multiple rows, or displays in which light-emitting elements are scattered. The present invention relates to an assembly jig for line-shaped display devices used for etc.

In general, this type of line-shaped display device has a large number of light emitting elements 1 mounted on a mounting board (hereinafter simply referred to as the board) 2 such as a printed circuit board at a desired height H (emitting light is emitted from the surface 2a of the board 2) as shown in FIG. It is necessary to fix the element 1 by lifting it up by the distance up to the tip of the lens portion 1a of the element 1 in accordance with the shape of the reflecting surface of the reflecting frame 3.

Conventionally, when assembling such a line-shaped display, as shown in FIG.
The leads 1b and 1c are inserted into the through-holes 5 provided on the substrate 2 at positions corresponding to the arrangement of the light-emitting elements 1, respectively, and raised to a desired height H, and the leads 1b and 1c are connected to the back surface 2b (pattern surface) of the substrate 2. Solder and secure. Alternatively, as another example, as shown in FIG.
Insert the tip of the lens part 1 into the position corresponding to the insertion hole 5 of the lens part 1.
In the same shape as a, cylindrical engravings 6a and 6b are formed at the rear end to be slightly larger than the diameter of the collar portion (stay) 1d, and the depth of the cylindrical engravings 6b is set to the desired height of the light emitting element 1. A frame 6 made of Bakelite or the like formed into an H shape,
After combining each light emitting element 1 with the substrate 2 so as to cover it from the front surface 2a side of the substrate 2, that is, from the bottom in the figure, one lead 1b, 1c is manually attached to a pattern (not shown) on the back surface 2b of the substrate 2. After soldering each light emitting element 1 one by one to the desired height H and fixing it to the substrate 2, the whole was turned over and the frame 6 was removed to assemble it.

In this conventional assembly method, each light emitting element is manually installed and fixed one by one, so the light emitting elements tend to be tilted and their heights are uneven, making it difficult for the optical axis and luminous intensity of the light emitting elements to be uniform. Otherwise, the desired amount of light cannot be obtained. Furthermore, since multiple light emitting elements are mounted, they do not fit into the predetermined holes of the reflective frame. Furthermore, the process requires a lot of time and effort, resulting in poor production efficiency and yield, resulting in a significant increase in processing costs.

This idea was made in view of the points mentioned above.
The relationship between the plurality of solid-state light emitting elements and the mount substrate is determined by a main frame formed in the shape of a square whose cross section has two steps, upper and lower, and between the upper surface of the step below the main frame and the mount substrate. By inserting the auxiliary frame into the main frame, each solid-state light emitting element and the mount board are pressed against the main frame, and the main frame, the auxiliary frame, the mount board, and each solid-state light emitting element are integrally clamped or otherwise placed in a desired relationship position. Therefore, by configuring the lead of each solid-state light-emitting element to be temporarily fixed and soldered to the mounting board, we have created an assembly jig for a line-shaped display that is suitable for mass production with good workability and high yield. The purpose is to provide

An embodiment of this invention will be described in detail below with reference to FIGS. 4 to 7. Components that are the same as those in FIGS. 1 to 3 are denoted by the same reference numerals, and explanations thereof will be omitted.

In FIG. 4, each light emitting element 1 is sequentially inserted into a large number of insertion holes 5 of a printed wiring board 2, so that the bottom surface of the collar 1'd of the light emitting element 1' is on the surface of the board 2. Arrange them by dropping them down to the position where they contact 2a.

In FIG. 5, the main frame 7 for positioning the light emitting element 1 is made of Bakelite or the like, which has a substantially square cross-section and has two steps formed by a step 7a formed by a thick portion and a step 7c formed by a thin portion. It is made of materials. The edge of the upper surface of the step 7a due to the thick part has the same thickness as the substrate 2, and one side surface 2c of the substrate 2 is provided.
a guide portion 7 for positioning this by contacting with the
b is formed. The rising amount m of the step 7a due to the thick portion relative to the step 7c due to the thin portion is the value obtained by subtracting the height H of the lens portion 1a and the thickness h of the flange portion 1d from the height H. That is, m=H-
(+h). Therefore, the height H of the light emitting element 1 from the surface 2a of the substrate 2 is equal to the height difference between the seat 7d, which has a diameter R that allows the collar portion 1d to be externally fitted, and has a depth h in which the collar portion 1d is placed, and the steps 7a and 7c. It is determined by the rise amount m.

From the upper surface of the step 7c of the main frame 7 to the position corresponding to the arrangement of the light emitting elements 1, there is a through hole with the rear end of the seat 7d and the tip of which the lens portion 1a fits externally, a through hole having a diameter r (slightly larger than the outer diameter of the lens portion 1a). 8 toward the bottom surface 7e of the main frame 7, and the axis of the through hole 8 is perpendicular to the surface 2a of the substrate 2 placed on the top surface of the step 7a.

The auxiliary frame 9, which fills the notch on the top surface of the step 7c due to the thin part, that is, the space between the top surface 2a of the substrate 2 and the top surface 2a, is made of Bakelite material or hard rubber material, and the right edge of the top surface is A guide portion 9a having a thickness equal to the thickness of the substrate 2 is provided for abutting against the other side surface 2d of the substrate 2 and clamping it with the guide portion 7b. In the auxiliary frame 9, after the light emitting elements 1 having the leads 1b and 1c inserted through the substrate 2 are placed in the corresponding through holes 8, the substrate 2 is placed on the upper surface of the step 7a formed by the thick part of the main frame 7. When the guide portion 9a presses against the other side surface 2d, the back surface of the light emitting element 1, that is, the collar portion 1d.
A part of the back surface is formed so as to be in surface contact with the tip 9c of the bottom surface 9b of the auxiliary frame 9. In this case, it is necessary not to touch the leads 1b and 1c.

The clamps 10a and 10b are made of an elastic body such as piano wire or a leaf spring, and after combining the main frame 7, the auxiliary frame 9, and the board 2 as described above, they are attached to both sides and the back surface 2b of the board 2 and the main frame. It is elastically clamped and fixed from the bottom of the frame 7.

In order to assemble a line-shaped display using a jig constructed in this way, each light emitting element 1 is inserted into the corresponding insertion hole 5 of the substrate 2 as shown in FIG. 4, and then dropped. After the main frame 7 is overturned from above the surface 2a of the substrate 2 so that the guide portion 7b comes into contact with the side surface 2c of the substrate 2, the main frame 7 and the substrate 2 are both turned upside down. Next, as shown in FIG. 5, all the light emitting elements 1 are dropped into the corresponding through holes 8, and the collar portions 1d are placed on the upper surface of the step 7c of the main frame 7. By doing so, each light emitting element 1 is attached to the substrate 2.
The height H from the top is adjusted to the desired height.

Next, insert the auxiliary frame 9 into the notch of the main frame 7, that is, under the surface 2a of the board 2 from the side in the direction of arrow p, press the guide part 9a against the other side surface 2d of the board 2, and press the guide part 9a against the other side surface 2d of the board 2. Frame 7 and auxiliary frame 9 are shown in Figure 5 or Figure 7.
After the clamp 10 is integrated as shown in the figure,
Clamp from both sides with a and 10b. Next, the back side 2b (pattern side) of the substrate 2 is placed on the tray for the next process.
Arrange them face down. Therefore, by dipping this patterned surface into a solder dip tank (not shown), all the soldering can be completed at the same time in one operation. Alternatively, it is also possible to successively solder a large number of boards 2 using an automatic soldering device equipped with an automatic transport mechanism.

After soldering is completed, clamps 10a, 10
b is removed, the main frame 7 and the auxiliary frame 9 are separated from the substrate 2, and the assembly of the linear display is completed. The through holes 8 shown in FIG. 5 have the function of allowing vapors of solder and flux to escape during soldering, and facilitating cleaning when these adhere.

As described above, according to this invention, the main frame and the auxiliary frame are provided so as to temporarily fix a large number of light emitting elements at desired positions and heights on the board through which their leads are inserted into predetermined positions (1) Soldering can be done with the pattern side of the board facing down.

(2) The positioning status of each light emitting element can be confirmed from the side during assembly.

(3) The height and position of each light emitting element and its optical axis are reliably determined.

(4) By immersing the device in a solder dip bath, the leads of all the light emitting devices can be soldered at the same time in one operation.

(5) Automatic soldering equipment can perform continuous soldering work on multiple boards.

(6) Eliminates mistakes in soldering work.

(7) All soldering finishes are uniform.

(8) Efficiency will be dramatically improved.

(9) Processing costs are significantly reduced.

There are other effects.

[Brief explanation of drawings]

Figures 1 to 3 show the conventional assembly structure of a line-shaped display. Figure 1 is a sectional side view of the main part showing an example of a multiple bar-shaped display, and Figure 2 shows a light-emitting element mounted on a substrate. 3 is a side sectional view of main parts showing another example, and FIGS. 4 to 7 show embodiments of this invention. FIG. 5 is a perspective view showing the state of insertion; FIG. 5 is an overall sectional view showing the light emitting element clamped at a desired position; FIG. 6 is a rear view showing the relationship between the bottom of the light emitting element and the auxiliary frame position; FIG. 7 is an overall perspective view excluding the clamp. 1...Solid light emitting element, 1a...Lens portion, 1
b, 1c...Lead, 1d...Brim portion, 2...Mount board, 7...Main frame, 7a, 7c...Step,
7d...Catch, 8...Through hole, 9...Auxiliary frame.

Claims (1)

[Scope of utility model registration request] The upper surface has a step on which the mount board is placed and another step on which the auxiliary frame is placed, and the lens portion of the solid-state light emitting element is loosely inserted into the surface of the other step, and the lens flange is formed on the surface of the other step. a main frame having a through hole formed therein, the receiving seat being abutted by the solid-state light emitting element being positioned at a certain distance from the surface; The flange portion is brought into contact with the seat, and an auxiliary frame is inserted and placed between the other step and the mount substrate, so that the heights of the plurality of solid-state light emitting elements arranged on the mount substrate are made to be uniform. Assembly jig for line-shaped display.