INJECTOR HOLDER

Abstract

The present invention aims for smoothly aligning an injector and an injector holder in a circumferential direction when the injector is assembled to the injector holder. In an injector holder 1 having an injector cup 2 for inserting an injector 8 into the injector cup 2 and an annular flange 3 projecting outward from an opening edge of the injector cup 2, an engaging recess piece 4 is extended from the annular flange 3, the engaging recess piece 4 having a recess 6 capable of being engaged with an engaging protrusion 16 protruded from the injector 8 for positioning the injector 8, and a claw portion 7 extending in a direction of assembling the injector 8 is projected from the tip of the engaging recess piece 4.

Claims

1. An injector holder comprising: an injector cup for inserting an injector into the injector cup; and an annular flange protruding outward from an opening edge of the injector cup, wherein an engaging recess piece is extended from the annular flange, the engaging recess piece having a recess capable of being engaged with an engaging protrusion protruded from the injector for positioning the injector, a claw portion extending in a direction of assembling the injector is protruded from the tip of the engaging recess piece, and the tip of the claw portion is configured to abut the engaging protrusion when the injector and the injector cup are displaced with each other in a circumference direction on the way of inserting the injector into the injector cup.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a perspective view showing the first embodiment of the present invention.

[0017] FIG. 2 is a partial cross-sectional view of the first embodiment.

[0018] FIG. 3 is a partially enlarged cross-sectional view during the assembling process of the first embodiment.

[0019] FIG. 4 is a perspective view of the conventional example.

[0020] FIG. 5 is a partial cross-sectional view of the conventional example.

[0021] FIG. 6 is a partially enlarged cross-sectional view during the assembling process of the conventional example.

MODES FOR CARRYING OUT THE INVENTION

First Embodiment

[0022] The first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. First, (1) is an injector holder, and the injector holder (1) has an injector cup (2) and an annular flange (3) projecting outward from an outer peripheral edge of the injector cup (2). An engaging recess piece (4) is extended from the annular flange (3). The engaging recess piece (4) includes a pair of projecting pieces (5) and a U-shaped recess (6) provided between the pair of projecting pieces (5). A claw portion (7) is extended from the tip of the projecting piece (5) of the engaging recess piece (4). The claw portion (7) is protruded from the protrusion piece (5) to extend from the protrusion piece (5) in a state of being bent from the protrusion direction of the protrusion piece (5) to the injector (8) side.

[0023] The engaging protrusion (16) of the injector (8) is capable of being engaged with the recess (6) of the engagement recess (4). The engaging protrusion (16) is L-shaped in cross section, and the engaging protrusion (16) is provided on the outer peripheral surface of the injector (8) on the tip opening (10) side as shown in FIG. 1. The tip side of the engaging protrusion (16) is protruded toward the injector holder (1) to which the injector (8) is assembled.

[0024] As shown in FIG. 1, the injector holder (1) can be assembled to the injector (8) in a state that the engaging protrusion (16) is arranged and engaged in the recess (6) of the injector holder (1). At this time, as shown in FIG. 2, the O-ring (11) provided on the outer periphery of the tip opening (10) of the injector (8) is arranged to be in close contact with the inner peripheral surface (12) of the injector holder (1). Accordingly, since the engaging protrusion (16) is engaged with the engaging recess piece (4) while the injector (8) is difficult to be pulled out of the injector holder (1), the injector (8) is assembled to the injector holder (1) in a state that the injector (8) is difficult to rotate with respect the injector holder (1)

[0025] When the injector (8) is assembled to the injector holder (1) at the correct position where the engaging protrusion (16) of the injector (8) is engaged with the engaging concave piece (4) of the injector holder (1) as described above, the assembling operation can be performed smoothly. However, when the injector (8) and the injector holder (1) are displaced in the circumferential direction during the assembling process, for example, the tip (13) of the engaging protrusion (16) of the injector (8) comes into contact with the tip (14) of the claw portion (7) of the injector holder (1) at the time when the tip opening (10) side of the injector (8) is inserted into the injector holder (1).

[0026] Here, as shown in FIG. 3, since the claw portion (7) is extended from the protrusion piece (5) in the direction of assembling the injector (8) as described above, the tip opening (10) of the injector (8) remains at a shallow position without entering into a deep position inside the injector holder (1) when the engaging protrusion (16) of the injector (8) and the claw portion (7) of the injector holder (1) abut with each other. Consequently, the O-ring (11) provided on the outer periphery of the tip of the injector (8) remains in the vicinity of the opening (15) of the injector holder (1) without coming into close contact with the inner peripheral surface (12) of the injector holder (1) as shown in FIG. 3.

[0027] Accordingly, when the injector (8) and the injector holder (1) are displaced with each other in the circumference direction as described above, the engaging protrusion (16) of the injector (8) comes into contact with the claw portion (7) of the injector holder (1), and the injector (8) can be easily pulled out of the injector holder (1) and the damage of the O-ring caused by the pulling can be prevented. Thus, the O-ring (11) can be continuously used without the need for replacement, which is economical.

DESCRIPTION OF THE REFERENCE NUMERALS

[0028] 1 injector holder

[0029] 2 injector cup

[0030] 3 annular flange

[0031] 4 engaging recess piece

[0032] 6 recess

[0033] 7 claw portion

[0034] 8 injector

[0035] 14 tip

[0036] 16 engaging protrusion