JP5611930B2 - Oil level gauge - Google Patents

Description

  The present invention includes a synthetic resin gauge part that is immersed in oil to detect the oil level, a grip part that is gripped by an operator when the oil level is detected, and an elongated elastic body that connects the gauge part and the grip part. The present invention relates to an oil level gauge including a saber portion made of a metal plate.

  When the synthetic resin fitting part that fits into the opening of the engine guide pipe is integrally formed so as to cover the outer periphery of the metal rod part of the oil level gauge, the through hole formed in the rod part is Japanese Patent Application Laid-Open No. 2004-133867 discloses that the fitting portion is firmly coupled to the rod portion by flowing a part of the molten resin forming the fitting portion.

Japanese Utility Model Publication No. 6-89914

  By the way, when a synthetic resin gauge portion is provided at the tip of a saber portion made of an elongated elastic metal plate, a through hole corresponding to the through hole described in Patent Document 1 is formed in the saber portion, and a gauge is formed in the through hole. It is conceivable that the gauge portion is firmly bonded to the saber portion by flowing a part of the molten resin forming the portion.

  When such an oil level gauge is pulled out from the guide pipe of the engine, if the gauge part provided at the tip of the saber part is caught by the bent part of the guide pipe, the synthetic resin inside the through hole of the saber part will break and the gauge part May fall out. In order to prevent this, if the through hole of the saber part is enlarged, the strength of the saber part may be reduced in the vicinity of the through hole and breakage may occur.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to firmly bond a gauge portion to a saber portion while preventing breakage of the saber portion of an oil level gauge.

  To achieve the above object, according to the first aspect of the present invention, a synthetic resin gauge portion that is immersed in oil and detects the oil level, and is gripped by an operator when the oil level is detected. An oil level gauge comprising a gripping part and a saber part made of an elongated elastic metal plate connecting the gauge part and the gripping part, wherein the saber part is a first to which molten resin flows when the gauge part is molded. An oil level gauge characterized by comprising a through hole, the gage portion having a enlarged portion in which the end on the gripping portion side is enlarged, and the first through hole is disposed inside the enlarged portion. Is proposed.

According to the invention described in claim 2, in addition to the configuration of claim 1, the saber portion is formed when the gauge portion is formed on the side farther from the grip portion than the first through hole. oil level gauge, characterized in that it comprises at least one second through hole molten resin flows is Ru been proposed.

  The second enlarged portion B of the embodiment corresponds to the enlarged portion of the present invention.

  According to the configuration of the first aspect, the oil level gauge includes a synthetic resin gauge portion that is immersed in oil to detect the oil level, a grip portion that is gripped by an operator when the oil level is detected, and a gauge portion. And a saber portion made of an elongated elastic metal plate for connecting the grip portion. The first through hole formed in the saber portion so that the molten resin flows in when the gauge portion is molded is disposed inside the enlarged portion where the end portion on the grip portion side of the gauge portion is enlarged. Even if the size of the first through hole is increased in order to increase the coupling force between the portion and the gauge portion, the periphery of the fragile first through hole can be covered with the enlarged portion to ensure the strength of the saber portion. Also, when pulling out the oil level gauge from the guide pipe, the enlarged part of the gauge part comes into contact with the inner surface of the guide pipe, so that the oil attached to the thinner part than the enlarged part of the gauge part comes into contact with the inner surface of the guide pipe. The oil level gauge can be pulled out smoothly by preventing the scrapes from being scraped off and improving the oil level detection accuracy and guiding the enlarged portion along the guide pipe.

According to the configuration of claim 2, since the saber portion includes at least one second through hole on the side farther from the grip portion than the first through hole, the first through hole is formed when the gauge portion is formed of synthetic resin. In addition to the molten resin flowing into the second through-hole, the gauge part can be more firmly connected to the saber part, and especially the part far from the grip part of the gauge part is surely peeled off from the saber part. Ru can be prevented.

The top view of an oil level gauge. FIG. 2 is an enlarged view of part 2 of FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. The perspective view of the gauge part of an oil level gauge. Sectional drawing of the metal mold | die which shape | molds an oil level gauge.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, an oil level gauge G for detecting the level of engine oil stored in an oil pan of an automobile engine includes a saber portion 11 made of a bendable strip-shaped metal leaf spring, and a saber portion. 11 is provided with a synthetic resin gripping portion 12 provided on the base end side of 11 and a synthetic resin gauge portion 13 provided on the distal end side of the saber portion 11.

  A guide pipe (not shown) that communicates with the bottom of the oil pan is provided inside the engine case, and a grip portion 12 that is integrally formed of synthetic resin so as to wrap the base end side of the saber portion 11 of the oil level gauge G. When the gauge portion 13 and the saber portion 11 are inserted into the guide pipe, the two O-rings 14 and 14 are provided in the portion where the grip portion 12 is fitted to the entrance of the guide pipe. The O-rings 14 and 14 can hold the oil level gauge G so as not to fall out of the guide pipe, and can prevent oil leakage from the guide pipe.

  As shown in FIGS. 2 to 4, the gauge portion 13 is a rod-shaped member integrally formed of synthetic resin so as to cover the distal end side of the saber portion 11, and the gauge portion 13 is firmly integrated with the saber portion 11. One first through-hole 11a and two second through-holes 11b and 11c are formed so as to be spaced apart in the longitudinal direction of the oil level gauge G so that the first and second through-holes can be formed. 11a, 11b, and 11c are filled with a part of the synthetic resin of the gauge portion 13. Although the second through holes 11b and 11c are circular, the first through hole 11a located closest to the grip portion 12 is elongated in the longitudinal direction of the oil level gauge G so as to be larger than the second through holes 11b and 11c. It is formed.

  The bar-shaped gauge portion 13 is formed such that an intermediate portion C excluding the first enlarged portion A on the distal end side and the second enlarged portion B on the proximal end side has a constant elliptical cross section in the longitudinal direction. Recesses 13a are formed in a grid pattern. The recesses 13a have a function of increasing the oil level detection accuracy by holding the oil adhering thereto and making it difficult to flow.

  The first enlarged portion A has the same width W as the intermediate portion C, but is enlarged so that the maximum thickness Tt is larger than the thickness Tc of the intermediate portion C. The second enlarged portion B has the same width W as the intermediate portion C, but is enlarged so that the maximum thickness Tr is larger than the thickness Tc of the intermediate portion C. Therefore, when viewed from the direction shown in FIG. 3, the intermediate portion C has a constricted shape with respect to the first enlarged portion A and the second enlarged portion B. Since the 1st through-hole 11a of the saber part 11 is provided in the position enclosed by the 2nd enlarged part B, the thickness of the 2nd enlarged part B becomes large around the 1st through-hole 11a.

  The distal end side of the first enlarged portion A, that is, the end portion opposite to the gripping portion 12 side is smoothly curved like a part of a spherical surface, and the proximal end side is smoothly connected to the intermediate portion C. Further, the proximal end side of the second enlarged portion B, that is, the gripping portion 12 side, is smoothly connected to the surface of the saber portion 11, and the distal end side is smoothly connected to the intermediate portion C.

A total of six pin holes 13b are formed by deepening the concave portions 13a to reach the saber portion 11 at three locations that are spaced apart from each other in the longitudinal direction on both surfaces of the intermediate portion C. The pin holes 13b are formed so as to be shifted in the longitudinal direction so as not to interfere with the first and second through holes 11a, 11b, 11c. FIG. 5 shows a mold 15 for injection-molding the gauge portion 13 with a synthetic resin. The mold 15 is divided into an upper mold 16 and a lower mold 17, and cavities 16 a and 17 a for molding the gauge portion 13 are formed between them.

  The upper mold 16 and the lower mold 17 include holding grooves 16b and 17b that hold the saber portion 11 and three pressing pin support holes 16c... 17c. Six retaining pins 18 having a square cross section are slidably fitted to 17c. Further, one of the upper mold 16 and the lower mold 17, for example, the lower mold 17, is formed with a hot water supply port 17d communicating with the cavities 16a and 17a.

  Therefore, in order to mold the gauge portion 13 with a synthetic resin, the upper die 16 and the lower die 17 are clamped, and the saber portion 11 is sandwiched between the holding groove 16b of the upper die 16 and the holding groove 17b of the lower die 17. In addition, the holding pins 18 are inserted into the pin support holes 17c of the upper mold 16 and the pin support holes 17c of the upper mold 16, and the saber portion 11 is formed inside the cavities 16a and 17a of the upper mold 16 and the lower mold 17. And fix them in place. In this state, the gauge part 13 is molded so as to wrap the saber part 11 by injecting molten resin into the cavities 16a and 17a from the hot water supply port 17d.

  At this time, since the saber portion 11 is fixed by the pressing pins 18..., The saber portion 11 is not displaced with respect to the gauge portion 13 by the momentum of the injected molten resin. Further, when the molten resin flows into the first through hole 11 a and the second through holes 11 b and 11 c of the saber part 11, the part becomes an anchor and the gauge part 13 is firmly integrated with the saber part 11.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When an operator grasps the grip part 12 of the oil level gauge G and inserts the gauge part 13 into the guide pipe in order to detect the level of oil stored in the oil pan, the elastic saber part 11 becomes a bent shape of the guide pipe. By following and bending, a part of the gauge part 13 is immersed in the oil inside the oil pan, and the oil adheres to that part. Therefore, the oil level stored in the oil pan can be detected by pulling out the oil level gauge G from the guide pipe and confirming the length of the portion of the gauge portion 13 where the oil is adhered.

  At this time, since a large number of recesses 13a are formed on the surface of the gauge portion 13, the oil retained in the recesses 13a immersed in the oil is difficult to flow, and the oil level detection accuracy is improved. Further, since the pin holes 13b formed by the pressing pins 18 at the time of forming the gauge portion 13 have the same shape as the recesses 13a, the function of the recesses 13a is not impaired and the appearance is not deteriorated.

  In the completed oil level gauge G, since the large-diameter first through hole 11a formed in the saber portion 11 is disposed inside the second enlarged portion B, the molten resin is first used when the gauge portion 13 is molded. By flowing into the through hole 11a, the coupling force between the saber part 11 and the gauge part 13 can be increased. And even if the first through hole is enlarged in order to increase the binding force, the portion that has become brittle due to the formation of the first through hole 11a is covered with the second enlarged portion B to ensure the strength of the saber portion 11, It is possible to prevent the saber portion 11 from being broken at the first through hole 11a. In addition, since the second through holes 11b and 11c are formed in the saber portion 11 in addition to the first through holes 11a, a plurality of first and second through holes 11a and 11b are formed when the gauge portion 13 is formed of synthetic resin. , 11c, the gauge part 13 can be more firmly coupled to the saber part 11, and the gauge part 13 and the saber part 11 are separated in the vicinity of the tip part of the oil leveler gauge G. Can be prevented.

Further, when the oil level gauge G is pulled out from the guide pipe, the first and second enlarged parts A and B of the gauge part 13 come into contact with the inner surface of the guide pipe, so that the oil adhered to the intermediate part C of the gauge part 13 Can be prevented from being scraped off in contact with the inner surface of the guide pipe, and the oil level detection accuracy can be improved. Moreover, since the base end portion of the second enlarged portion B is enlarged synovial Laka, gauge when pulling out pulling the gauge portion 13 of the oil level gauge G from the guide pipe, the base end portion of the second enlarged section B slides It is possible to prevent the portion 13 from being caught by the bent portion of the guide pipe and peeled off from the saber portion 11.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the saber portion 11 includes the two second through holes 11b and 11c, but the number of the second through holes is not limited to two and may be one or more.

11 Saber part 11a 1st through-hole 11b 2nd through-hole 11c 2nd through-hole 12 Holding part 13 Gauge part B 2nd enlarged part (hypertrophied part)

Claims (2)

A synthetic resin gauge portion (13) that is immersed in oil to detect the oil level, a grip portion (12) that is gripped by an operator when the oil level is detected, the gauge portion (13), and the grip portion An oil level gauge comprising a saber portion (11) made of an elongated elastic metal plate connecting (12),
The saber portion (11) includes a first through hole (11a) into which molten resin flows when the gauge portion (13) is molded, and the gauge portion (13) is an end on the gripping portion (12) side. An oil level gauge comprising an enlarged portion (B) having an enlarged portion, wherein the first through hole (11a) is disposed inside the enlarged portion (B). The saber portion (11) is at least one second through which molten resin flows when the gauge portion (13) is formed on the side farther from the grip portion (12) than the first through hole (11a). characterized in that it comprises a through hole (11b, 11c), the oil level gauge according to claim 1.

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