WO2011007385A1 - 車両状態検出装置および製造方法 - Google Patents
車両状態検出装置および製造方法 Download PDFInfo
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- WO2011007385A1 WO2011007385A1 PCT/JP2009/003298 JP2009003298W WO2011007385A1 WO 2011007385 A1 WO2011007385 A1 WO 2011007385A1 JP 2009003298 W JP2009003298 W JP 2009003298W WO 2011007385 A1 WO2011007385 A1 WO 2011007385A1
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- WIPO (PCT)
- Prior art keywords
- mold body
- vehicle state
- detection device
- detection element
- state detection
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
- B29C45/14655—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components connected to or mounted on a carrier, e.g. lead frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1671—Making multilayered or multicoloured articles with an insert
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3055—Cars
- B29L2031/3061—Number plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
Definitions
- the present invention relates to a vehicle state detection device that detects a vehicle state using detection elements such as acceleration and angular velocity, and a method for manufacturing the same.
- the vehicle state detection device is, for example, a resin-molded detection element such as acceleration or angular velocity, and is used as, for example, a sensor for an automobile airbag device or attitude control device.
- the vehicle state detection device is installed as shown in FIG. 12, for example. That is, the vehicle state detection devices 2 and 5 are in the engine room of the vehicle 1, the vehicle state detection device 8 is under the seat, the vehicle state detection devices 3, 4, 6, and 7 are in the pillar, and the vehicle state detection device 9 is It is set in the trunk room, and when a collision occurs, a state detection signal is sent to the airbag control device 10 to inflate an airbag (not shown) instantly to protect the passenger.
- the vehicle state detection device uses a narrow space and is attached to a plurality of locations, it is required to be small, light, and inexpensive.
- the safety of automobiles there is a need for so-called high reliability that can maintain stability of products without variations and high-precision performance over a long period of time in harsh environments.
- FIG. 13 shows the structure of a conventional vehicle state detection device and its molding die.
- a detection element 11 for detecting a vehicle state is mounted on a lead frame 18, and the periphery thereof is molded with resin to form a primary mold body 12.
- the lead terminal 14 of the detection element 11 formed by the lead frame 18 is taken out from the primary mold body 12.
- the primary mold body 12 is subjected to secondary processing.
- the connector terminal 16 for connecting with an external harness is welded to the lead terminal 14.
- the primary mold body 12 is held in a predetermined space between the upper mold 119 ′ and the lower mold 120 ′, and between the both molds and the primary mold body 12. Resin is injected into the space to mold the secondary mold body 13.
- the upper surface and the lower surface of the primary mold body 12 on which the detection element 11 is positioned are held on the upper mold 119 ′ and the lower mold 120 ′ facing each other in a convex primary mold body holding. It is held by being sandwiched between the portions 28 and 28, and thermal stress is prevented from being applied to the detection element 11 during resin injection.
- the connector terminal 16 is inserted and held in the slide mold 121 '. In the case of this method, as shown in FIGS.
- a part of the secondary mold body 13 serving as a casing of the vehicle state detection device, that is, the trace of the primary mold body holding portions 28 and 28 being removed.
- a vertical hole 29 communicating with the surface of the primary mold body 12 from the outside is formed.
- Patent Document 1 after fixing the airtight detection unit structure of the acceleration sensor and the signal processing circuit on the lead frame, and performing wire bonding between the detection unit structure, the signal processing circuit, and the lead frame,
- the sensor part structure is molded so that the deformation of the sensor part structure itself caused by thermal stress due to the difference in thermal expansion coefficient between the sensor part structure and the plastic material is minimized.
- a technique has been proposed in which a thermal stress relaxation mechanism is provided in a plastic structure surrounding the body or the detection unit structure. In this technique, the cost is reduced and the acceleration sensor is reduced in size and weight by a full molding mounting method. Further, by providing a thermal stress relaxation mechanism, the deformation of the detection unit structure itself can be minimized, and the temperature characteristics of the acceleration sensor can be improved.
- one form of the thermal stress relaxation mechanism described in Patent Document 1 changes the internal specification of the detection unit structure itself of the acceleration sensor. This change is a problem related to the policy of the acceleration sensor manufacturer. In the case of a secondary processing manufacturer using an acceleration sensor, it is almost difficult to execute.
- another form of the thermal stress relaxation mechanism is characterized by the shape of the plastic structure to be fully molded. For example, a method of providing a groove or a recess on the surface of the plastic structure is integrally molded. When the height of the detector structure and the signal processing circuit are different, the plastic material thickness is made the same so as to eliminate the difference in local thermal expansion coefficient. For example, a molding method. However, when these thermal stress relaxation mechanisms perform secondary molding of the thermoplastic resin around the primary mold body 12 incorporating the detection element as shown in FIG. 13, the thermoplastic resin exerts on the detection element. There is no suggestion of how to relieve the thermal stress caused by.
- the present invention has been made to solve the above-described problems, and performs secondary molding on the primary molded detection element to form a housing, a connector housing, and a device fixing portion. It is an object of the present invention to obtain a vehicle state detection device having a configuration in which thermal stress does not reach the detection element, and a method for manufacturing the device.
- the vehicle state detection device has a configuration in which a hollow portion in a connector housing portion formed by secondary molding is penetrated to the surface area of the primary mold body corresponding to the position of the detection element.
- the detection element subjected to primary molding when the detection element subjected to primary molding is secondarily molded, a cavity extending from the connector housing portion to the portion of the secondary mold body corresponding to the position of the detection element is provided. Therefore, at the time of secondary molding, since the resin used for molding is at a position away from the detection element, it is difficult for the thermal stress of the injected resin to be applied to the detection element. As a result, variations in characteristics can be avoided. Further, even when the vehicle state detection device is in use, since a hollow portion is formed between the secondary mold body and the detection element, it is possible to avoid the stress on the secondary mold side from being applied to the detection element.
- the resin used for the housing is a thermoplastic resin in consideration of impact resistance and moldability as a connector housing, but the thermoplastic resin has a large thermal stress at the time of molding, and the molded detection element It was difficult to form a double layer.
- this invention also makes it possible to use thermoplastic resins. Also, by connecting the mating connector at the time of use, the cavity is sealed by a waterproof structure such as packing, so that airtightness can be secured, and there is no need to bother to block the cavity afterwards, sealing member And there is no post process.
- FIG. 10 is a perspective plan view showing another example of the reinforcing structure of the vehicle state detection device according to the fifth embodiment.
- FIG. 10 is a perspective plan view showing still another example of the reinforcing structure of the vehicle state detection device according to the fifth embodiment. It is explanatory drawing which shows the usage type example of a vehicle state detection apparatus. It is explanatory drawing which shows the shaping
- FIG. 1A and 1B are explanatory views showing a structure of a full mold mounting type of a vehicle state detection device according to Embodiment 1 of the present invention, FIG. 1A being a perspective plan view, and FIG. FIG. 1C is a cross-sectional view along BB ′.
- the vehicle state detection apparatus uses a primary mold body 12 that is resin-molded in a state where a detection element 11 such as an acceleration or an angular velocity for detecting a vehicle state is mounted on a lead frame 18.
- the lead terminal 14 of the detection element 11 is taken out from the primary mold body 12 and welded to the connector terminal 16.
- the secondary mold body 13 serves as a casing of the device by further molding the primary mold body 12 using a thermoplastic resin.
- One end portion of the primary mold body 12 is supported by the secondary mold body 13 and is arranged in a hollow portion 19 formed by the secondary mold body 13.
- the secondary mold body 13 is provided with a connector housing portion 15, and connector terminals 16 are arranged in the connector housing portion 15 so as to be coupled to an external connector.
- the hollow portion 19 starts from the inside of the housing and penetrates to a portion corresponding to the mounting position of the detection element 11. Further, around the secondary mold body 13, for example, a device fixing portion 17 made of a hole is integrally provided.
- FIG. 2 shows a structure of a molding die of the vehicle state detection device
- FIG. 3 shows a method of manufacturing a secondary mold body (however, the device fixing portion is not shown).
- the secondary mold body 13 of the vehicle state detection device is formed using at least three types of the upper mold 119, the lower mold 120, and the slide mold 121.
- the primary mold body 12 manufactured by the primary molding is temporarily held by the slide mold 121 by setting between the pair of sandwiching members 121a.
- the primary mold body 12 temporarily held by the slide mold 121 is placed on the lower mold 120 that integrally forms the device housing, the connector housing portion, and the device fixing portion.
- the secondary mold body 13 is hardened by injecting resin together with the corresponding upper mold 119 on the lower mold 120 and cooling.
- an outer peripheral portion serving as a housing is formed, and an inner diameter portion of the connector housing portion 15 is formed by the slide mold 121.
- the trace from which the sandwiching member 121a of the slide mold is removed corresponds to the installation position of the detection element from within the connector housing portion.
- the cavity 19 penetrates to the surface area of the primary mold body 12.
- the primary mold body 12 serves as an insert part for secondary molding, a mechanism for holding the primary mold body 12 from being poured by the injection pressure of the molding resin is necessary.
- the primary mold body 12 is held by providing the upper mold 119 ′ and the lower mold 120 ′ with the convex primary mold body holding portion 28.
- the upper mold 119 and the lower mold 120 do not require a holding mechanism.
- it is possible to reduce the sealing member and the sealing process generated in the post-process as in the conventional apparatus, and it is not necessary to consider the influence on the detection element 11 by them.
- the detection element 11 inserted into the primary mold body 12 is covered with the secondary mold body 13 which is a housing through the hollow portion 19. Since the detection element 11 and the secondary mold body 13 are separated from each other by the hollow portion 19, the detection element 11 hardly receives direct thermal stress during the secondary molding and after the secondary molding. This greatly contributes to stabilizing the electrical characteristics due to manufacturing variations of the apparatus and ensuring the stability of characteristics due to temperature characteristics and aging degradation.
- the detection element 11 may include a circuit that electrically processes the detection signal, and a signal processing circuit, an electronic component such as a resistor or a capacitor is mounted on the lead frame 18 together with the detection element 11. It may be.
- Fig. 4 shows a fitting state of the external connector with respect to the vehicle state detection device.
- a connector terminal 53 of the mating connector 52 is connected to the connector terminal 16 of the vehicle state detection device, and a signal harness 54 for sending a detection signal is connected to the connector terminal 53.
- the counterpart connector 52 is connected in a state where the vehicle state detection device functions as a product, the hollow portion 19 in the connector housing portion 15 is cut off from the outside by the housing portion of the counterpart connector 52, and the primary mold body 12. Is not directly exposed to the outside.
- the fitting structure between the connector housing portion 15 and the housing portion of the mating connector 52 and the structure of the mating connector 52 have a waterproof function, the water resistance performance as the device can be easily secured.
- the secondary molded body 13 has a structure in which the outer periphery of the casing is seamless, high reliability can be expected.
- the hollow portion 19 in the connector housing portion 15 formed by secondary molding penetrates to the surface area of the primary mold body 12 corresponding to the position of the detection element 11. It is molded so that Therefore, at the time of secondary molding, since the resin used for molding is at a position away from the detection element, it is difficult for the thermal stress of the injected resin to be applied to the detection element. As a result, variations in characteristics can be avoided. Further, even when the vehicle state detection device is in use, since there is a cavity between the secondary mold body and the detection element, it is possible to prevent the stress on the secondary mold side from being applied to the detection element.
- thermoplastic resin is used for the resin of the housing in consideration of impact resistance and moldability as a connector housing.
- the thermoplastic resin has a large thermal stress at the time of molding, and detection of molding is performed. It was difficult to double-mold the element.
- this invention also makes it possible to use thermoplastic resins.
- the cavity is easily sealed by a waterproof structure such as packing, so that airtightness can be secured, and there is no need to bother to block the cavity afterwards.
- the seal member and the post process are eliminated.
- a small, lightweight, and highly reliable vehicle state detection device can be realized at low cost.
- FIG. FIG. 5 is an explanatory view showing the structure of the primary mold body of the vehicle state detection device according to Embodiment 2 of the present invention.
- rib-shaped positioning guides 25 are provided so as to surround the area of the surface corresponding to the position of the internal detection element 11 from three sides. .
- the positioning guide 25 regulates the mounting position of the primary mold body 12 with respect to the slide mold 121. This ensures the positional relationship of the detection element 11 with respect to the secondary mold body 13 and improves the dimensional accuracy of the product. As a result, the inclination of the detection element 11 does not occur, and the stability of product characteristics is improved.
- the positioning guide 25 the contact area between the primary mold body 12 and the slide mold 121 during the secondary molding can be increased, and the flow resistance of the molding resin can be further increased. It is possible to prevent the two-molded resin from flowing into the inside surrounded by the guide 25, that is, in the vicinity of the detection element 11.
- the primary mold body 12 is provided with a groove 26 inside the positioning guide 25 so as to surround a region of the surface corresponding to the position of the detection element 11. Even if the molding resin flows in from the gap between the primary mold body 12 and the slide mold 121 during the secondary molding, the resin can be retained before reaching the vicinity of the detection element 11 by the groove 26. Therefore, by providing the positioning guide 25 and the groove 26, the cavity 19 provided in the corresponding part of the detection element 11 can be more reliably secured.
- the positioning guide 25 and the groove 26 are more preferably provided on two or more surfaces of the primary mold body 12, but the effect can be expected even when provided on only one surface. Moreover, although the positioning guide 25 is convex in FIG. 5, it may be concave and the same effect can be expected.
- FIG. FIG. 6 is a cross-sectional view showing the structure of a full mold mounting type of a vehicle state detection device according to Embodiment 3 of the present invention.
- the lead terminal 14 formed from the lead frame 18 and the connector terminal 16 are connected to each other by welding.
- FIG. As shown, the lead terminal 14 of the lead frame 18 is extended to be integrated as a connector terminal 16 'on the same plane.
- the connector terminal By configuring the connector terminal as described above, it is possible to reduce the number of parts and the joining process of both parts, thereby reducing the price of the vehicle state detection device. Further, since the integrated lead frame 18 and connector terminal 16 ′ are in the same plane, the primary mold body 12 can be made thinner accordingly. This not only contributes to the downsizing of the apparatus, but also makes it easier to form a structure that extends the cavity inside the connector housing 15 to the vicinity of the detection element 11.
- FIG. 7 is a cross-sectional view showing a full mold mounting structure of a vehicle state detection device according to Embodiment 4 of the present invention.
- a folded portion 18 a that covers the detection element 11 is formed by extending the side opposite to the connector terminal 16 ′ of the member forming the lead frame 18.
- the folded portion 18a By forming the folded portion 18a, the effect of electromagnetic shielding can be expected.
- a piece 18 b obtained by bending the lead frame 18 around the detection element 11 is provided. By providing the bent piece 18b, it is possible to increase the rigidity against warping and distortion of the lead frame 18, and to improve the resistance to thermal stress caused by resin molding and stress caused by external force, and to have an electromagnetic shielding effect. .
- FIG. 9 is a perspective plan view showing a reinforcing structure of a vehicle state detection device according to Embodiment 5 of the present invention.
- the secondary mold body 13 always has a unique frequency, if the detection element 11 resonates with respect to the device fixing portion 17, an unexpected state is output, and the device detects the state of the vehicle. Is a problem. For this reason, it is desired that the natural frequency of the secondary mold body 13 is sufficiently high with respect to the original frequency range to be detected. In this case, it is necessary to ensure the rigidity of the structure from the device fixing portion 17 to the detection element 11, but there is a limit in the thermoplastic resin generally used for the housing. Therefore, the rigidity is increased by inserting the reinforcing member 27 made of a material having a higher Young's modulus than the resin constituting the secondary mold body 13 so as to reinforce the housing in the resin portion where rigidity is to be ensured.
- the reinforcing member 27 may be an enlarged portion 12 'of the same material provided in the existing primary mold body 12 as shown in FIG. 10, or an apparatus as shown in FIG. It is good also as enlarged part 17 'of the same material provided in the cylindrical components (for example, metal bush) used for the fixing
- Such enlarged portions 12 ′ and 17 ′ can also improve the natural frequency of the apparatus and increase the rigidity of the secondary mold body 13.
- the increase in rigidity by these methods also has an effect of reducing the thickness of the thermoplastic resin that constitutes the secondary mold body 13, so that it also serves as a measure for reducing resin voids generated during secondary molding.
- the vehicle state detection device and the manufacturing method according to the present invention provide a hollow portion in the connector housing portion formed by secondary molding in order to perform secondary molding on the primary molded detection element. Is made to penetrate to the surface area of the primary mold body corresponding to the position of the detection element, which is suitable for preventing thermal stress during molding from reaching the detection element.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
Description
実施の形態1.
図1は、この発明の実施の形態1による車両状態検出装置のフルモールド実装型の構造を示す説明図で、図1(a)は透視平面図、図1(b)はA-A’断面図、図1(c)はB-B’断面図である。
車両状態検出装置は、リードフレーム18に車両状態を検出する加速度や角速度等の検出素子11を実装した状態で樹脂成形した1次モールド体12を用いている。検出素子11のリード端子14は1次モールド体12から外部へ取り出されてコネクタ端子16に溶接されている。車両状態検出装置は、1次モールド体12に対してさらに熱可塑性樹脂を用いて2次成形することにより2次モールド体13が装置の筐体となるようにしている。1次モールド体12は、その一端部が2次モールド体13で支持されて、2次モールド体13で形成される空洞部19内に配置されたようになっている。2次モールド体13にはコネクタハウジング部15が設けられ、コネクタハウジング部15内にはコネクタ端子16が配置され外部コネクタと結合されるようになっている。空洞部19は、ハウジング内から始まって、検出素子11の実装位置に対応する部分まで貫通している。また、2次モールド体13の周囲には、例えば孔からなる装置固定部17が一体化により設けられている。
1次成形で製作された1次モールド体12を一対の挟み部材121aの間にセットすることによってスライド金型121で仮保持する。次に、スライド金型121で仮保持された1次モールド体12を、装置筺体、コネクタハウジング部および装置固定部を一体化形成する下金型120に載せる。次に、下金型120の上に対応する上金型119を併せて樹脂を注入し冷却することにより2次モールド体13が固まる。この状態で、筐体となる外周部が形成され、スライド金型121によりコネクタハウジング部15の内径部が形成される。次に、上下金型から離型された2次モールド体13からスライド金型121を抜くことにより、スライド金型の挟み部材121aが抜かれた跡がコネクタハウジング部内から検出素子の設置位置に対応する1次モールド体12の面領域まで貫通する空洞部19となるようにしている。
なお、検出素子11は、検出信号を電気的に処理する回路を備えていてもよく、また検出素子11と一緒にリードフレーム18上に信号処理回路や抵抗、コンデンサ等の電子部品を搭載するようにしてもよい。
図5は、この発明の実施の形態2に係る車両状態検出装置の1次モールド体の構造を示す説明図である。
スライド金型121で挟まれる1次モールド体12の対向2面には、内部の検出素子11の位置に対応する面の領域を、三方から取り囲むようにリブ状の位置決めガイド25が設けられている。この位置決めガイド25によりスライド金型121に対する1次モールド体12の取り付け位置が規制される。このことにより検出素子11の2次モールド体13に対する位置関係が確実となり、製品の寸法精度が向上する。延いては検出素子11の傾き等が発生しないことから製品特性の安定性が向上することになる。また、位置決めガイド25を設けることで2次成形する際の1次モールド体12とスライド金型121の接触面積を増やすことができ、さらに成形樹脂の流動抵抗を大きくできるため、これらの隙間から位置決めガイド25に囲まれた内側、すなわち検出素子11付近に2成形の樹脂が流入するのを防止できる。
なお、位置決めガイド25および溝26は1次モールド体12の2面以上に設けることがより好ましいが、1面だけに設けた場合でもその効果は期待できる。また、図5では位置決めガイド25を凸形状にしているが、凹形状にしてもよく、同じ効果が期待できる。
図6は、この発明の実施の形態3に係る車両状態検出装置のフルモールド実装型の構造を示す断面図である。図において、図1に相当する部分には同一符号を付し、その部分に関する同じ説明は省略する。
上記実施の形態1の1次モールド体の構造においては、リードフレーム18から形成されたリード端子14とコネクタ端子16を溶接により段違いに接続していたが、この実施の形態3では、図6に示すように、リードフレーム18のリード端子14を延長してコネクタ端子16’として同一平面に一体化した構造としている。
図7は、この発明の実施の形態4に係る車両状態検出装置のフルモールド実装型の構造を示す断面図である。図において、図6に相当する部分には同一符号を付し、その部分に関する同じ説明は省略する。
この実施の形態4では、リードフレーム18を形成している部材のコネクタ端子16’と反対側を延長して検出素子11を覆う折り返し部18aを形成している。折り返し部18aを形成することにより、電磁シールドの効果が期待できる。なお、この折り返し部18aはGND端子側のリードフレームを用いるのが望ましい。
また、図8に示すように、リードフレーム18を検出素子11の周りで曲げ起こした片18bを設ける。この曲げ起こし片18bを設けることでリードフレーム18の反りや歪みに対する剛性を上げることができ、樹脂成形による熱応力や外力による応力に対する耐量を向上させ、かつ電磁シールド効果を持たせることが期待できる。
図9は、この発明の実施の形態5に係る車両状態検出装置の補強構造を示す透視平面図である。図において、図1に相当する部分には同一符号を付し、その部分に関する同じ説明は省略する。
2次モールド体13は必ず固有の振動数を有しているが、装置固定部17に対して検出素子11が共振すれば期待しない状態を出力することになり、車両の状態を検出する装置としては問題となる。このため、2次モールド体13の固有振動数は、本来の検出対象とする周波数領域に対して十分に高いことが望まれる。この場合、装置固定部17から検出素子11までの構造体の剛性を確保する必要があるが、一般に筐体に用いる熱可塑性の樹脂では限界がある。よって、剛性を確保したい樹脂部分に、2次モールド体13を構成する樹脂よりもヤング率の高い材質の補強部材27を筐体補強するように挿入して剛性アップを行う。
Claims (12)
- リードフレームに車両状態を検出する検出素子を実装した状態で樹脂成形した1次モールド体に2次成形を施して、コネクタハウジング部および装置固定部を一体化形成した2次モールド体からなる車両状態検出装置において、
前記2次成形で形成されるコネクタハウジング部内の空洞部を、前記検出素子の位置に対応する1次モールド体の面領域まで貫通させてなることを特徴とする車両状態検出装置。 - 1次モールド体は、検出素子の位置に対応する当該1次モールド体の面の領域を囲むように、スライド金型に取り付ける位置を決める位置決めガイドを設けたことを特徴とする請求項1記載の車両状態検出装置。
- 位置決めガイドは、リブ状としたことを特徴とする請求項2記載の車両状態検出装置。
- 1次モールド体は、位置決めガイドの内側で、検出素子の位置に対応する当該1次モールド体の面の領域を取り囲む溝を設けたことを特徴とする請求項2記載の車両状態検出装置。
- 1次モールド体から引き出されコネクタハウジング部内に設定される検出素子からのリード端子と相手方コネクタと接続するコネクタ端子は、リードフレームで一体化形成されていることを特徴とする請求項1記載の車両状態検出装置。
- リード端子とコネクタ端子は同一平面で構成されていることを特徴とする請求項5記載の車両状態検出装置。
- リードフレームは、コネクタ端子と反対側を延長して検出素子を覆うよう形成された折り返し部を有することを特徴とする請求項5記載の車両状態検出装置。
- リードフレームは、検出素子の位置に対応した1次モールド体の周りに曲げ起こし片を有することを請求項5記載の車両状態検出装置。
- 2次モールド体は、検出素子と装置固定部との間に当該2次モールド体の樹脂よりもヤング率の高い材質の補強部材を介在させていることを特徴とする請求項1記載の車両状態検出装置。
- 補強部材は、1次モールド体に設けた当該1次モールド体と同材質の拡大部としたことを特徴とする請求項9記載の車両状態検出装置。
- 補強部材は、2次モールド体に設けた装置固定部に用いる金属性円筒部品に設けた当該部品と同材質の拡大部したことを特徴とする請求項9記載の車両状態検出装置。
- リードフレームに車両状態を検出する検出素子を実装した状態で1次成形した1次モールド体をスライド金型の一対の挟み部材の間にセットして仮保持し、
スライド金型で仮保持された1次モールド体を、下金型にセットし、
前記下金型の上に対応する上金型を併せて樹脂を注入して2次成形し、
上下金型から離型された2次モールド体から前記スライド金型を抜くことにより、前記スライド金型の挟み部材が抜かれた跡が前記コネクタハウジング部内から前記検出素子の設置位置に対応する前記1次モールド体の面領域まで貫通する空洞部となるようにしたことを特徴とする車両状態検出装置の製造方法。
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US13/259,052 US8796572B2 (en) | 2009-07-14 | 2009-07-14 | Vehicle condition detection device and method for manufacturing the same |
PCT/JP2009/003298 WO2011007385A1 (ja) | 2009-07-14 | 2009-07-14 | 車両状態検出装置および製造方法 |
CN200980160112.0A CN102470805B (zh) | 2009-07-14 | 2009-07-14 | 车辆状态检测装置及制造方法 |
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Cited By (4)
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JP2012195069A (ja) * | 2011-03-15 | 2012-10-11 | Sumitomo Wiring Syst Ltd | 機器用コネクタ |
KR101577191B1 (ko) | 2011-09-07 | 2015-12-15 | 한국델파이주식회사 | 차량용 교류 발전기의 레귤레이터 |
JP2015227026A (ja) * | 2014-06-02 | 2015-12-17 | 日立金属株式会社 | 樹脂成形体付きケーブルの製造方法及び樹脂成形体付きケーブル |
JP2017007307A (ja) * | 2015-06-26 | 2017-01-12 | 日立金属株式会社 | 樹脂成形体付きケーブルの製造方法 |
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DE102008054743A1 (de) * | 2008-12-16 | 2010-06-17 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Herstellung einer Vorrichtung |
US9570872B2 (en) * | 2014-05-05 | 2017-02-14 | Jeffrey D. Carnevali | Docking station having connector preload and isolator system |
EP3109026B1 (de) | 2015-06-23 | 2018-11-28 | Gerresheimer Regensburg GmbH | Vorrichtung zur herstellung von kunststoffteilen mit einlegeteilen |
US10203228B2 (en) * | 2016-07-20 | 2019-02-12 | Veoneer Us, Inc. | Crash sensor assembly |
JP6810894B2 (ja) * | 2017-07-14 | 2021-01-13 | 株式会社オートネットワーク技術研究所 | コネクタ |
DE102019001380B3 (de) | 2019-02-26 | 2020-08-06 | Leoni Kabel Gmbh | Verfahren zur Herstellung eines Kabels |
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