JP6288329B2 - Method for manufacturing product having a plurality of parts fixed to each other with adhesive, and method for assembling and fixing parts - Google Patents

Description

  The present invention relates to a method for manufacturing a product having a plurality of parts fixed to each other with an adhesive, and a method for assembling and fixing the parts.

  Conventionally, when assembling a product, it has been well known that two parts are assembled and an adhesive is used to fix the two parts to each other, as shown in Patent Document 1, for example.

JP 2012-113185 A

  The inventor of the present application considered filling an adhesive into a space formed between two parts by assembling the two parts. As a result, an idea was conceived in which an injection port surrounding a hole communicating from the outside into the space was formed in one part, and an adhesive was filled into the space from the injection port.

  However, according to the inventors' investigation, the above method has the following problems. When mass-producing products, it is common to automatically fill each product with an adhesive. In that case, it is normal to control the amount of the adhesive filled in the space from the adhesive dispenser to a constant amount, but the supply amount of the adhesive to be filled still varies. Also, the space surrounded by the two parts inevitably varies due to the tolerance of each product.

  In order to firmly fix the two parts, it is desirable to fill the space with the adhesive with as many products as possible. However, if the supply amount of the adhesive is controlled to do so, The supply amount is too large, and the adhesive overflows from the injection port. If the adhesive overflows from the inlet to the outside, there will be problems such as the appearance of the product being impaired.

  In view of the above points, the present invention is a technique for filling an adhesive space from an injection port into an external space by filling the space formed between the two components by assembling the two components. The purpose is to reduce the possibility of the occurrence.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a second part having a first part (31) and an injection port (321) having a tapered part (321b) and a nozzle receiving part (321a). A part (32) and an adhesive (8), wherein the first part and the second part surround an internal space (X), and The nozzle receiving portion so that the inlet communicates with the external space of the second part and the internal space, and the tapered portion tapers from the external space toward the internal space. Placing the first component and the second component such that the portion is closer to the inner space than the tapered portion, and inserting the adhesive injection nozzle (7) into the nozzle receiving portion, Injecting the adhesive from an adhesive injection nozzle And the step of supplying the adhesive into the internal space X from the nozzle receiving part so as to spread to the taper part, and irradiating the adhesive with laser light (9) from the injection port. And a step of curing the agent, wherein the diameter of the laser beam is larger than the diameter of the nozzle receiving portion and smaller than the maximum diameter of the tapered portion. Further, in order to achieve the above object, the invention according to claim 3 is formed with the first part (31) and the injection port (321) having the tapered portion (321b) and the nozzle receiving portion (321a). A method of assembling and fixing to a second part (32), wherein the first part and the second part surround an internal space (X), and the external space of the second part and the The injection port communicates with the internal space, and the tapered portion tapers from the external space toward the internal space, and the nozzle receiving portion is more internal than the tapered portion. as in space side, said a step of the first component to place the second component, the adhesive injection nozzle (7) is inserted into the nozzle receiving portion, the adhesive injection nozzle or al adhesives By injecting the adhesive Supplying the inner space X from the nozzle receiving portion so as to spread to the tapered portion, and curing the adhesive by irradiating the adhesive with laser light (9) from the inlet. And the diameter of the laser beam is larger than the diameter of the nozzle receiving portion and smaller than the maximum diameter of the tapered portion.

  Thus, the inlet has a tapered portion that tapers as it goes from the outer space to the inner space. Therefore, even if the amount of the adhesive supplied by the adhesive dispenser is too large, the amount of the taper portion that receives the excessive amount increases, so the adhesive may overflow outside the injection port (ie, the external space). Is reduced.

  In addition, the code | symbol in the bracket | parenthesis in the said and the claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later. .

1 is a perspective view of an imaging apparatus 1 according to an embodiment of the present invention. 2 is a component development view of the imaging apparatus 1. FIG. 2 is a perspective view of a camera module 3. FIG. 2 is a perspective view of a camera module 3. FIG. 3 is a front view of the camera module 3. FIG. FIG. 3 is a component development view of the camera module 3. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG. 5 is a diagram showing a process of injecting an adhesive 8 into the internal space X. FIG. It is a figure which shows the state with which the adhesive agent 8 was filled into the internal space X. FIG. It is a figure which shows the state with which the adhesive agent 8 was filled into the internal space X. FIG. It is a figure of a comparative example. It is a figure which shows the state with which the adhesive agent 8 was filled into the internal space X. It is a figure of a comparative example. It is a modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The imaging apparatus 1 according to the present embodiment is mounted on a vehicle, images the front of the vehicle, performs various analysis processes (such as an image recognition process) using an image obtained as a result of the imaging, and the resulting signals are the same. It is a device that outputs to other ECUs in the vehicle (for example, headlight control ECU, lane departure detection ECU).

  As shown in FIG. 1, the imaging device 1 includes a housing 2 and a camera module 3 that is partially exposed from an opening 21 formed near the center of the upper surface of the housing 2. Yes. This camera module 3 is a part for photographing the front of the vehicle. The imaging apparatus 1 is attached to a portion of the windshield (that is, the windshield) that is located in the vehicle interior and in the vicinity of the room mirror.

  Here, the configuration of the imaging apparatus 1 will be described in more detail. As illustrated in FIG. 4, the imaging device 1 includes a housing 2, a camera module 3, a control board 4, electrical connection wiring 5, and a lower cover 6.

  As described above, the opening 21 that connects the inside and the outside of the housing 2 is formed near the center of the upper surface of the metal housing 2. The camera module 3 is mounted on the housing 2 so that a part of the camera module 3 is exposed from the opening 21, the control board 4 and the electrical connection wiring 5 are disposed below the camera module 3, and the lower cover 6 is disposed below the camera module 3. The imaging device 1 is configured by being fixed to the housing 2. The position of the opening 21 on the housing 2 is a position facing the control board 4.

  The depression 22 is a part formed so that the casing 2 does not block the shooting range of the camera module 3, and the opening 21 is formed so as not to block the shooting range of the camera module 3. Yes.

  Here, the configuration of the camera module 3 will be described with reference to FIGS. The camera module 3 includes a barrel 31, a holder 32, and a camera substrate 33.

  The barrel 31 is a substantially cylindrical resin member in which an optical system used for photographing in front of the vehicle is disposed inside. Specifically, on the inner side of the barrel 31, the photographing lenses 35a to 35d and the spacers 36a to 36d for positioning the lenses 35a to 35d are arranged.

  More specifically, the barrel 31 includes a tip end portion 31a, a body portion 31b, a first collar portion 31c, a second collar portion 31d, and a second collar portion 31d. The distal end portion 31a is a cylindrical member whose outer diameter decreases in diameter toward the distal direction (left direction in FIG. 7). The body portion 31b is a substantially cylindrical member having a substantially constant inner diameter and outer diameter, and the tip (left end portion in FIG. 7) is fitted and bonded to the tail portion of the tip portion 31a. In addition, the front-end | tip part 31a and the trunk | drum 31b are arrange | positioned coaxially by making the optical axis 310 into an axis | shaft.

  The first collar portion 31c, the second collar portion 31d, and the third collar portion 31e are perforated disk-shaped flange members that surround the outer periphery of the trunk portion 31b and stand perpendicular to the outer circumferential surface of the trunk portion 31b.

  The holder 32 is a member that accommodates the barrel 31 and to which the camera substrate 33 is fixed with screws. The holder 32 is mainly made of resin, and further contains carbon for light shielding. Since the holder 32 contains carbon, when the holder 32 is irradiated with a laser beam for curing an adhesive, which will be described later, the temperature of the holder 32 suddenly rises due to absorption, and as a result, the holder 32 may be damaged. Becomes higher.

  The holder 32 includes a holder base portion 32a to which the camera substrate 33 is fixed with screws, and a substantially cylindrical holder tube portion 32b that extends from the holder base portion 32a in the direction of the optical axis 310 and accommodates the barrel 31. Yes. The holder base portion 32a and the holder cylinder portion 32b are integrally formed.

  Moreover, as shown in FIG. 3, the injection port 321 surrounding the adhesive injection hole is formed on the upper side of the holder tube portion 32b. As shown in FIG. 4, an exhaust port 322 surrounding the air hole is formed below the holder tube portion 32b. As shown in FIG. 7, the inlet 321 and the exhaust port 322 are provided at opposite positions with the optical axis 310 in between. More specifically, the exhaust port 322 communicates with the position farthest from the injection port 321 in the internal space X.

  The camera board 33 is a circuit board on which a solid-state imaging device 33 a (for example, a CMOS image sensor) for acquiring a photographed image in front of the vehicle is mounted, and is fixed to the rear rear surface of the holder 32. In a state where the barrel 31 is fixed to the holder 32 and the camera substrate 33 is fixed to the holder 32, the solid-state imaging element 33a is disposed on the common optical axis 310 of the lenses 35a to 35d in the barrel 31. Thereby, the light collected by the lenses 35a to 35d forms an image on the solid-state image sensor 33a, and the solid-state image sensor 33a outputs a signal corresponding to the image. Note that the position of the opening 21 on the housing 2 is a position facing the camera substrate 33.

  The electrical connection wiring 5 shown in FIG. 2 is a wiring (for example, a flexible printed circuit board) that connects the solid-state imaging device 33a and other circuits on the camera board 33 to a circuit mounted on the control board 4. The circuit mounted on the control board 4 includes a detection unit that performs the above-described analysis processing and the like.

  Here, a method for assembling and fixing the barrel 31 and the holder 32 will be described. First, in the first step, the operator inserts the barrel 31 into the holder tube portion 32 b of the holder 32. In this state, as shown in FIG. 7, the first collar portion 31c, the second collar portion 31d, and the third collar portion 31e abut on the entire circumference of the inner wall of the holder cylinder portion 32b.

  Thereby, the surface of the first collar portion 31c on the second collar portion 31d side, the surface of the second collar portion 31d on the first collar portion 31c side, and the outer surface of the trunk portion 31b, the first collar portion 31c and the first collar portion 31c. The inner space X is surrounded by the surface between the two collar portions 31d and the surface between the first collar portion 31c and the second collar portion 31d of the inner wall surface of the holder cylinder portion 32b.

  The internal space X has an annular shape as shown in FIG. In order to fill the annular inner space X with adhesive and fix the barrel portion 31b and the holder holder cylinder portion 32b to each other, an injection port 321 for communicating the inner space X and the outer space is provided with respect to the inner space X. It is desirable to form it so that it does not become too large.

  As shown in FIGS. 7 and 8, the inlet 321 and the exhaust port 322 are formed in a portion surrounding the internal space X in the holder tube portion 32 b. This internal space X communicates with the space outside the camera module 3 only through the inlet 321 and the exhaust port 322.

  Here, the shapes of the inlet 321 and the outlet 322 will be described. The injection port 321 is an opening for communicating the external space and the internal space X in order to inject an adhesive described later into the internal space X.

  As shown in FIG. 8, the shape of the injection port 321 is arranged on the nozzle receiving portion 321a arranged on the inner space X side and on the outer space of the camera module 3 (more specifically, on the outer space of the holder 32). The taper portion 321b has two different portions.

  The nozzle receiving portion 321a has a constant inner diameter and extends from the inner space X side end of the injection port 321 toward the outer space. Therefore, the diameter of the nozzle receiving portion 321a does not change from the outer space toward the inner space X. This inner diameter is the same as or slightly larger than the outer diameter of the adhesive injection nozzle 7 described later. For example, the inner diameter is not less than 0.95 times and not more than 1.0 times the outer diameter of the adhesive injection nozzle 7.

  The tapered portion 321b extends from the outer space side end of the injection port 321 in the inner space X direction, and is connected to the outer space side end portion of the nozzle receiving portion 321a. And the taper part 321b becomes a mortar shape opened with respect to external space. More specifically, the tapered portion 321b tapers from the external space of the camera module 3 toward the internal space X. In other words, the diameter of the tapered portion 321b decreases from the outer space of the camera module 3 toward the inner space X. In addition, when the virtual line 311 orthogonal to the optical axis 310 and passing through the center of the adhesive injection hole is set, the nozzle receiving part 321a and the tapered part 321b are circular in any cross section orthogonal to the virtual line 311. . The height of the nozzle receiving portion 321a in the direction of the imaginary line 311 is, for example, half the height of the tapered portion 321b in the direction of the imaginary line 311.

  The exhaust port 322 is provided for discharging air in the internal space X when an adhesive, which will be described later, is filled in the internal space X, and is an opening that communicates the internal space X of the injection port 321 with the external space. The inner diameter is constant and smaller than the inner diameter of the nozzle receiving portion 321a. The exhaust port 322 is formed coaxially with the injection port 321 and is circular in any cross section orthogonal to the virtual line 311.

  Next, in the second step, as shown in FIG. 9, the operator inserts the tip of the adhesive injection nozzle 7 of the adhesive dispenser into the nozzle receiving portion 321 a, and removes the adhesive 8 from the adhesive injection nozzle 7. Let it fire. Then, the adhesive 8 is supplied into the internal space X from the nozzle receiving portion 321a.

  The adhesive 8 is a heat-curable adhesive that is cured by being heated and has translucency (that is, transparent or translucent), for example, an epoxy resin containing a transparent filler. .

  The outer diameter of the tip portion of the adhesive injection nozzle 7 is the same shape as the nozzle receiving portion 321a, that is, a cylindrical shape whose diameter does not change. Accordingly, since the portion where the adhesive injection nozzle 7 and the nozzle receiving portion 321a are in contact with each other without any gap is wide, the adhesive 8 enters the external space from the gap (in-row portion) between the adhesive injection nozzle 7 and the nozzle receiving portion 321a. The possibility of leakage is reduced.

  Further, since the internal space X communicates with the external space through the exhaust port 322, the adhesive 8 flows into the internal space X and air is discharged from the internal space X through the exhaust port 322 to the external space. Therefore, possibility that the inflow of the adhesive agent 8 will be inhibited by the air in the internal space X is reduced. Furthermore, since the exhaust port 322 communicates with the position farthest from the injection port 321 in the internal space X, the function of discharging the air is the last, that is, as shown in FIG. Persist until filling is complete.

  In the present embodiment, the imaging devices 1 are mass-produced, and the camera modules 3 of the imaging devices 1 that are mass-produced are assembled and fixed by the same method. When the assembly is fixed, the supply amount of the adhesive 8 injected from the adhesive injection nozzle 7 is controlled to be the same. However, the supply amount of the adhesive injection nozzle 7 still varies for each imaging device 1 (corresponding to an example of a product). Also, the internal space X inevitably varies due to the tolerance of each imaging device 1.

  In order to firmly fix the barrel 31 and the holder 32, it is desired to fill the internal space X with the adhesive 8 with as many imaging devices 1 as possible, but if the supply amount of the adhesive 8 is controlled so as to be several, In the imaging apparatus 1, the amount of the adhesive 8 supplied is too large, and the adhesive may overflow from the internal space X to the injection port 321. Even in such a case, as described above, if the injection port 321 has the tapered portion 321b, even if the supply amount of the adhesive 8 is excessively large, as shown in FIGS. The amount that 321b receives the excessive amount increases. Therefore, the possibility that the adhesive overflows outside the injection port 321 (that is, the external space) is reduced, and as a result, the frequency of occurrence of problems such as the appearance of the imaging device 1 being impaired is reduced.

  If the injection port 321 does not have the tapered portion 321b and the diameter does not change from the end on the inner space X side to the end on the outer space side as shown in FIG. The amount to receive too much will decrease. Then, the possibility that the adhesive overflows outside the injection port 321 increases.

  Next, in the third step, the operator irradiates the adhesive 8 with the laser beam 9 from the injection port 321 as shown in FIG. Thus, the laser beam 9 is applied to the adhesive 8 in the vicinity of the injection port 321, so that the portion irradiated with the adhesive 8 is heated and cured. Thereby, the barrel 31 and the holder 32 are fixed to each other through the cured adhesive 8 in the vicinity of the injection port 321.

  Note that the diameter of the laser light 9 is larger than the diameter of the nozzle receiving portion 321a. This is because the laser light 9 passes through the entire hole formed by the nozzle receiving portion 321a even when the irradiation position of the laser light 9 is slightly shifted. By doing in this way, even if the irradiation position of the laser beam 9 is slightly shifted, the portion of the adhesive 8 in the internal space X that the laser beam 9 hits through the hole formed by the nozzle receiving portion 321a. Since the arrangement is not biased, temporary fixing becomes stronger.

  However, if the diameter of the laser beam 9 is larger than the diameter of the nozzle receiving portion 321a, the possibility that the laser beam 9 will hit the holder tube portion 32b increases. Then, as already explained, since the holder 32 contains carbon, the temperature of the holder 32 suddenly rises due to absorption resulting from the laser beam 9 hitting the holder 32, and as a result, the holder 32 is damaged. Is more likely to do.

  Therefore, in the present embodiment, the diameter of the laser light 9 is made larger than the diameter of the nozzle receiving portion 321a and smaller than the maximum diameter of the tapered portion 321b. As a result, as shown in FIG. 13, the holder tube portion 32b is protected by the adhesive 8 spread and received by the taper portion 321b, so that the area where the laser beam 9 hits the holder tube portion 32b is reduced, or , Become zero. Therefore, the possibility that the holder 32 is damaged is reduced.

  If the injection port 321 does not have the tapered portion 321b and the diameter does not change from the end on the inner space X side to the end on the outer space side as shown in FIG. As a result, the holder 32 is likely to be damaged.

  Next, in the fourth step, the operator slowly heats the camera module 3. Thereby, the part which was not hardened | cured by the 3rd process among the adhesives 8 hardens | cures all. Thereby, fixation of the barrel 31 and the holder 32 via the adhesive 8 is completed.

(Other embodiments)
In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like. For example, the following modifications are allowed. In addition, the following modifications can select application and non-application to the said embodiment each independently. In other words, any combination of the following modifications can be applied to the above-described embodiment.

(Modification 1)
In the above embodiment, the injection port 321 has the nozzle receiving part 321a and the tapered part 321b, but the nozzle receiving part 321a does not necessarily have to be provided. For example, as shown in FIG. 15, the injection port 321 may have a configuration having only a tapered portion 321b.

(Modification 2)
In the above embodiment, the diameter of the nozzle receiving portion 321a of the injection port 321 does not change as it goes from the external space toward the internal space X. However, this is not always the case.

  For example, the nozzle receiving portion 321a of the injection port 321 may have a shape that tapers from the outer space toward the inner space X. In this case, the change rate of the diameter of the nozzle receiving portion 321a along the direction from the external space toward the internal space X is smaller than the change rate of the diameter of the tapered portion 321b (that is, the taper amount is small). Also good.

  However, also in this case, if the nozzle receiving portion 321a has the same shape as the outer shape of the adhesive injection nozzle 7, leakage of the adhesive 8 from the in-row portion can be reduced. In this case, the adhesive injection nozzle 7 also has a tapered shape with the same diameter change rate as the injection port 321.

(Modification 3)
In the above embodiment, only one exhaust port 322 for communicating the internal space X and the external space is provided, but a plurality of exhaust ports may be provided.

(Modification 4)
In the above embodiment, both the inlet 321 and the exhaust port 322 are formed in the holder cylinder portion 32b. However, this is not necessarily the case. For example, the inlet 321 may be formed in the holder 32, and the exhaust port 322 may be formed in the body portion 31 b of the barrel 31.

  For example, both the injection port 321 and the exhaust port 322 may be formed in the trunk portion 31 b of the barrel 31. In this case, the barrel 31 corresponds to an example of the second member, and the holder 32 corresponds to an example of the first member.

(Modification 4)
The adhesive 8 does not necessarily have to be thermosetting.

(Remarks)
The present application can also be understood as the following technical matters.

[Technical matter 1]
A first part (31);
A second part (32);
An adhesive (8) filled in an internal space (X) enclosed between the first part and the second part,
The second part is formed with an injection port (321) for communicating the external space of the second part and the internal space in order to inject the adhesive into the internal space.
The product, wherein the inlet has a tapered portion (321b) that tapers from the outer space toward the inner space.

  Thus, the inlet has a tapered portion that tapers as it goes from the outer space to the inner space. Therefore, even if the amount of the adhesive supplied by the adhesive dispenser is too large, the amount of the taper portion that receives the excessive amount increases, so the adhesive may overflow outside the injection port (ie, the external space). Is reduced.

[Technical matter 2]
The product according to Technical Item 1, wherein the adhesive is cured by laser irradiation.

[Technical matter 3]
In the first component or the second component, an exhaust port (322) that communicates the external space and the internal space is formed separately from the injection port. Or the product of 2.

[Technical matter 4]
The product according to the technical item 3, wherein the exhaust port communicates with a position farthest from the injection port in the internal space.

[Technical matter 5]
The product according to any one of Technical Items 1 to 4, wherein the internal space is an annular space.

[Technical matter 6]
The injection port has a nozzle receiving portion (321a) having the same shape as the outer shape of the adhesive injection nozzle (7) in which an adhesive is injected into the internal space from the injection port, separately from the tapered portion. The product according to any one of the technical items 1 to 5, characterized in that:

[Technical matter 7]
Any one of the technical matters 1 to 5, wherein the inlet has a nozzle receiving portion (321a) whose diameter does not change from the outer space toward the inner space, apart from the tapered portion. A product according to one.

1 Imaging device (product)
7 Adhesive injection nozzle 8 Adhesive 31 Barrel (first part)
32 Holder (second part)
321 Inlet 321a Nozzle receiving portion 321b Taper 322 Exhaust port X Internal space

Claims (3)

A first part (31), a second part (32) formed with an inlet (321) having a tapered part (321b) and a nozzle receiving part (321a), and an adhesive (8). A method of manufacturing a product,
The first part and the second part surround the internal space (X), the external space of the second part and the internal space are in communication with the inlet, and the The first part and the second part are configured such that the tapered portion tapers from the outer space toward the inner space, and the nozzle receiving portion is located closer to the inner space than the tapered portion. Arranging the parts of
An adhesive injection nozzle (7) is inserted into the nozzle receiving portion, and the adhesive is injected from the adhesive injection nozzle so that the adhesive spreads from the nozzle receiving portion to the tapered portion. Supplying into X,
Curing the adhesive by irradiating the adhesive with laser light (9) from the inlet,
The diameter of the said laser beam is larger than the diameter of the said nozzle receiving part, and is smaller than the maximum diameter of the said taper part, The manufacturing method characterized by the above-mentioned. After the curing step, the first component, the second component, and the adhesive are heated to cure a portion of the adhesive that has not been cured in the curing step. The manufacturing method of Claim 1 characterized by the above-mentioned. An assembly fixing method of the first component (31) and the second component (32) in which the inlet (321) having the tapered portion (321b) and the nozzle receiving portion (321a) is formed,
The first part and the second part surround the internal space (X), the external space of the second part and the internal space are in communication with the inlet, and the The first part and the second part are configured such that the tapered portion tapers from the outer space toward the inner space, and the nozzle receiving portion is located closer to the inner space than the tapered portion. Arranging the parts of
The adhesive injection nozzle (7) is inserted into the nozzle receiving section, by injecting the adhesive injection nozzle or al adhesives, inside the adhesive, from the nozzle receiving portion so as to extend to the tapered portion Supplying into the space X;
Curing the adhesive by irradiating the adhesive with laser light (9) from the inlet,
An assembly fixing method, wherein the diameter of the laser beam is larger than the diameter of the nozzle receiving portion and smaller than the maximum diameter of the tapered portion.

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