JP2022131828A - Trigger-type liquid spouting unit - Google Patents

Abstract

To provide a trigger-type liquid spouting unit which secures the strength of engagement between a cover and a spouting unit main body, while suppressing an increase in its weight.SOLUTION: A trigger-type liquid spouting unit 1 includes: a spouting unit main body 10; a nozzle member; a trigger part; and a cover 13. The cover 13 includes: a cover main body 51 to be fitted to the spouting unit main body 10 through an insertion opening 51p; and an engaged portion 54 projecting, in a first direction orthogonal to an opening direction of the insertion opening 51p, from an inner surface of the cover main body 51. The engaged portion 54 includes: an engaging surface 54m engaged with an engaging part 63 provided on the spouting unit main body 10, from the outside in the opening direction; and a disengaging surface 54n which is directed outward in the opening direction, and extends inward in the opening direction when separated in the first direction from the inner surface of the cover main body 51. In the engaged portion 54, a lightening recess 54a is formed opened to a surface other than the engaging surface, out of surfaces of the engaged portion 54.SELECTED DRAWING: Figure 3

Description

The present invention relates to trigger-type liquid ejectors.

The trigger-type liquid ejector includes an ejector body having a pump portion, a nozzle member attached to a front end portion of the ejector body, and a trigger portion disposed so as to be movable backward in a forward biased state. A configuration is disclosed. In this type of trigger-type liquid ejector, the liquid in the container body is sent out by the pump section by pulling the trigger section backward to drive the pump section. The liquid delivered by the pump section is ejected forward through the ejection holes of the nozzle member.

For example, Patent Literature 1 listed below discloses a trigger-type liquid ejector including a cover that covers the ejector main body with the ejection hole exposed for the purpose of improving design. The ejector body is inserted into the cover from the front. At this time, the engaged portion provided on the cover climbs over the engaging portion provided on the ejector main body. As a result, the cover is attached to the ejector main body while the engaged portion is engaged with the engaging portion.

JP 2019-210051 A

By the way, in order to reduce the weight of the trigger-type liquid ejector, thinning the cover is being studied.
However, by making the cover thin, the cover is likely to deform, and as a result, there is a possibility that the engaged portion is likely to be disengaged from the engaging portion. On the other hand, if the height dimension of the engaged portion is increased in order to secure the amount of engagement between the engaged portion and the engaging portion, the volume of the engaged portion increases and the weight of the cover does not increase. difficult to suppress.

SUMMARY OF THE INVENTION The present invention provides a trigger-type liquid ejector capable of securing sufficient engagement strength between a cover and an ejector body while suppressing an increase in weight.

In order to solve the above problems, the present invention employs the following aspects.
A trigger-type liquid ejector according to an aspect of the present invention includes an ejector body having a pump section for sending out a liquid contained in a container body, and a liquid ejector body attached to a front end portion of the ejector body and ejected by the pump section. a nozzle member formed with an ejection hole for ejecting forward, a trigger section arranged to be movable backward in a forward biased state to drive the pump section, and a state in which the ejection hole is exposed a cover that covers the ejector body, the cover has an insertion opening into which the ejector body is inserted, and the cover body is attached to the ejector body through the insertion opening; an engaged portion protruding from the inner surface in a first direction intersecting the opening direction of the insertion opening, the engaged portion facing the opening with respect to the engaging portion provided in the ejector main body; and an engaging surface that faces outward in the opening direction and engages from the outside in the opening direction; and an engaging surface, and the engaged portion is formed with a lightening recess that opens to a surface of the engaged portion other than the engaging surface.

According to this aspect, since the recess is formed in the engaged portion, the protrusion height of the engaged portion from the inner surface of the cover body is increased, and the engagement between the engaged portion and the engaging portion is increased. Even if the engagement margin is increased, it is possible to suppress an increase in the volume of the engaged portion.
In particular, since the lightening recess is open on a surface other than the engaging surface of the engaged portion, the engagement margin between the engaged portion and the engaging portion can be reliably increased.
As a result, the strength of engagement between the cover and the ejector main body can be ensured while suppressing an increase in weight.
Moreover, since the anti-engagement surface of the engaged portion extends inward in the opening direction as it separates from the inner surface of the cover body in the first direction, the ejector body can be inserted into the cover body through the insertion opening. Sometimes, the engaged portion smoothly climbs over the engaging portion. As a result, even if the protrusion height of the engaged portion from the inner surface of the cover main body is increased, it is possible to secure the assembling property of the cover to the ejector main body.

In the trigger-type liquid ejector of the aspect described above, the lightening recess may be a vertical groove extending in the first direction, and the ejector body may be provided with a rib inserted into the lightening recess. preferable.
According to this aspect, the movement of the cover with respect to the ejector main body is restricted by the contact of the outer surface of the rib with the inner surface of the lightening recess. As a result, it is possible to suppress the unexpected release of the engagement between the engaged portion and the engaging portion. This facilitates maintaining the engaged state between the engaged portion and the engaging portion.

In the trigger type liquid ejector of the aspect described above, it is preferable that the lightening recess is open on the anti-engagement surface.
According to this aspect, when the ejector body and the cover are assembled, the rib is inserted into the lightening recess by inserting the ejector body into the cover body through the insertion opening. As a result, it is possible to ensure the ease of assembly of the cover with respect to the ejector main body.

ADVANTAGE OF THE INVENTION According to this invention, after suppressing an increase in weight, the engagement strength of a cover and an ejector main body can be ensured.

1 is a cross-sectional view of a trigger-type liquid ejector according to an embodiment; FIG. 1 is a perspective view showing the vicinity of an engaging portion in a trigger type liquid ejector according to an embodiment; FIG. 3 is a cross-sectional view corresponding to line III-III of FIG. 2; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the embodiments and modifications described below, the same reference numerals may be assigned to corresponding configurations, and descriptions thereof may be omitted.
As shown in FIG. 1, the trigger-type liquid ejector 1 is attached to a container body A containing liquid, and ejects the liquid forward. The trigger-type liquid ejector 1 includes an ejector body 10, a nozzle member 11, a trigger portion 12, and a cover 13. Note that each component of the trigger type liquid ejector 1 is a molded product using synthetic resin unless otherwise specified.

The ejector body 10 includes a vertical supply cylinder portion 21, a mounting cap 22, a pipe 23, an injection cylinder portion 24, a relay member 25, an upper plate member 27, and a pump portion 26. .
Hereinafter, the direction along the central axis O1 of the vertical supply tube portion 21 will be referred to as the vertical direction, the bottom (not shown) side of the container A will be referred to as the lower side, and the opposite side will be referred to as the upper side. When viewed from above and below, the side where the nozzle member 11 is positioned with respect to the vertical supply tube portion 21 is called the front side, and the opposite side is called the rear side. A direction orthogonal to the front-rear direction when viewed from the top-bottom direction is called the left-right direction.

The vertical supply cylinder part 21 sucks up the liquid in the container body A through the mouth part A1 of the container body A. As shown in FIG. The vertical supply tube portion 21 is formed in a multistage tube shape whose diameter decreases upward. Specifically, the vertical supply tube portion 21 includes a small diameter portion 21a positioned above, and a large diameter portion 21c continuous below the small diameter portion 21a via a stepped portion 21b.

The large-diameter portion 21c is provided with a flange portion 21d projecting radially outward.
A ball valve 28 is provided at the upper end within the small diameter portion 21a. The ball valve 28 switches communication and disconnection between the vertical supply cylinder portion 21 and the injection cylinder portion 24 in the small diameter portion 21a. Specifically, the ball valve 28 is a check valve that allows the liquid to flow from the vertical supply tube portion 21 to the injection tube portion 24 and regulates the liquid flow from the injection tube portion 24 to the vertical supply tube portion 21 . be. The ball valve 28 is made of metal, synthetic resin, or the like.

The mounting cap 22 is formed in a tubular shape extending in the vertical direction. The mounting cap 22 is detachably fastened to the opening A1 of the container body A with the flange 21d sandwiched between it and the upper opening edge of the opening A1. Note that the mounting cap 22 and the opening A1 may be fixed by a method other than screws (for example, fitting). In the illustrated example, the central axis O1 of the vertical supply tube portion 21 is located behind the container axis of the container body A. As shown in FIG.

The pipe 23 is inserted into the vertical supply tubular portion 21 through the inner side of the large-diameter portion 21c and is fitted into the small-diameter portion 21a from below. The pipe 23 extends downward inside the container body A when the trigger type liquid ejector 1 is attached to the container body A. As shown in FIG.

The injection tube portion 24 guides the liquid inside the vertical supply tube portion 21 toward the nozzle member 11 . The injection cylinder portion 24 extends forward from the upper end portion of the vertical supply cylinder portion 21 .
The relay member 25 connects between the injection cylinder portion 24 and the nozzle member 11 . The relay member 25 is attached to the injection cylinder portion 24 from the front.

The pump unit 26 stores and pumps the liquid in the container body A. As shown in FIG. The pump section 26 has a cylinder 31 and a piston 32 .
The cylinder 31 is provided in front of the small-diameter portion 21 a of the vertical supply tube portion 21 . The cylinder 31 is formed in a bottomed cylindrical shape that opens forward.
The piston 32 is provided movably back and forth with respect to the cylinder 31 . The piston 32 is formed in a bottomed cylindrical shape that opens rearward. The piston 32 slides on the inner peripheral surface of the cylinder 31 as it moves back and forth with respect to the cylinder 31 . The pressure inside the cylinder 31 is reduced as the piston 32 moves forward, and the pressure increases as the piston 32 moves backward.

The inside of the cylinder 31 communicates with the inside of the vertical supply tube portion 21 and the injection tube portion 24 through a communication path 36 provided in the vertical supply tube portion 21 . The communication passage 36 surrounds the ball valve 28 in the vertical supply tube portion 21 . The communication passage 36 communicates with the vertical supply cylinder portion 21 through a communication hole 21 f formed in the upper end portion of the vertical supply cylinder portion 21 . On the other hand, the communication path 36 communicates with the inside of the injection cylinder portion 24 through the rear end opening of the injection cylinder portion 24 .

The upper plate member 27 is attached to the injection tube portion 24 so as to surround the injection tube portion 24 from above and to the sides. The upper plate member 27 is formed in a downward U shape when viewed from the front. The upper plate member 27 includes a leaf spring member 40 , an elastic member 41 and bearing portions 42 .
The plate spring member 40 is provided above the ejection cylinder portion 24 along the front-rear direction. A rear end portion of the leaf spring member 40 is formed with a locking projection 40a projecting upward. The locking protrusion 40a is locked in a locking recess 24a formed in the rear end portion of the ejection cylinder portion 24. As shown in FIG. A locking recess 40b is formed in the front end portion of the plate spring member 40 . An engaging protrusion 25a formed on the relay member 25 is engaged with the engaging recess 40b. Thereby, the plate spring member 40 connects the ejection cylinder portion 24 and the relay member 25 .

The elastic member 41 extends downward from both lateral edges of the front end portion of the leaf spring member 40 . The elastic member 41 has a curved shape protruding forward, and is configured to be elastically deformable in the front-rear direction with a boundary portion (upper end portion) with the plate spring member 40 as a starting point.
The bearing portion 42 extends downward from both left and right edges of the rear end portion of the leaf spring member 40 . The bearing portion 42 has a curved shape protruding in the front-rear direction and is open rearward.

The trigger portion 12 extends downward from the upper plate member 27 . Specifically, the trigger portion 12 extends in front of the vertical supply tube portion 21 while curving forward as it goes downward. An upper end portion of the trigger portion 12 is supported by a bearing portion 42 so as to be rotatable around an axis along the left-right direction. On the other hand, the trigger portion 12 is connected to the elastic member 41 at a portion located below the bearing portion 42 . As a result, the trigger part 12 is configured to be rotatably supported by the bearing part 42 and to be moved backward in a forward biased state by the elastic member 41 .

The trigger part 12 is connected to the front end of the piston 32 . Therefore, the piston 32 moves rearward with respect to the cylinder 31 as the trigger portion 12 moves rearward.

The nozzle member 11 is attached to the relay member 25 from the front. The nozzle member 11 is formed in a bottomed tubular shape that opens rearward. A top wall portion (front wall portion) of the nozzle member 11 is formed with a jet hole 11a extending in the front-rear direction. The ejection hole 11 a communicates with the injection cylinder portion 24 through the inside of the nozzle member 11 and the inside of the relay member 25 .

The cover 13 surrounds a portion of the ejector body 10, a portion of the trigger portion 12 and a portion of the upper plate member 27 from above, rear and sides. The cover 13 is attached to the ejector body 10 by being inserted toward the front of the ejector body 10 .

The cover 13 has a configuration in which a cover body 51, a ridge portion 52, a first engaged portion 53, a second engaged portion 54, and a restricting piece 55 are integrally formed.
The cover body 51 is formed in a box shape with an insertion opening 51p that opens forward (opening direction). Specifically, the cover body 51 includes a top wall 51a, a pair of side walls 51b, a rear wall 51c, and a bottom wall 51d.

The above-mentioned "opening direction" is a direction that intersects the opening surface of the insertion opening 51p, and is the front-rear direction in this embodiment. In addition, the outside in the opening direction means the direction toward the outside of the cover 13 , and the inside in the opening direction means the direction toward the inside of the cover 13 .

The upper wall 51 a is arranged above the ejection cylinder portion 24 , the relay member 25 and the upper plate member 27 when the cover 13 is attached to the ejector main body 10 . A front edge of the upper wall 51 a is located behind the nozzle member 11 . Therefore, the cover 13 covers the ejector main body 10, the trigger portion 12, and the upper plate member 27 in a state in which the nozzle member 11 (ejection hole 11a) is exposed forward.
The side walls 51b extend downward from both lateral edges of the upper wall 51a. The side wall 51b surrounds the ejector main body 10, the trigger portion 12, and the upper plate member 27 from both sides in the left-right direction. The lower edge of the side wall 51b extends while curving downward toward the rear. Therefore, the lower end of the elastic member 41 protrudes downward from the lower edge of the side wall 51b at the front end of the side wall 51b.

The rear wall 51c spans the rear edge of the upper wall 51a and the rear edge of the side wall 51b. The rear wall 51c is formed in an L shape protruding rearward in a vertical cross-sectional view along the vertical direction. Specifically, the rear wall 51c extends rearward as it goes downward, and then extends forward as it goes further downward.

The bottom wall 51d extends forward from the lower edge of the rear wall 51c. The front edge of the bottom wall 51d approaches or abuts on the vertical supply tube portion 21 from behind. The left and right edges of the bottom wall 51d are connected to the rear lower edges of the side walls 51b. An insertion opening 51p for the cover main body 51 is formed by the front edge of the bottom wall 51d, the lower edge of the side wall 51b, and the front edge of the upper wall 51a.

The ridge portion 52 is formed on the inner surface of each side wall 51b (the surface facing each side wall 51b). The ridge portion 52 extends in the front-rear direction while protruding inward in the left-right direction from the inner surface of each side wall 51b. The ridge portion 52 is inserted from behind into a rail portion (not shown) provided on the ejector main body 10 . This restricts the vertical movement of the cover 13 with respect to the ejector body 10 .

The first engaged portion 53 protrudes downward from the rear end portion of the upper wall 51a. The first engaged portion 53 is engaged from the front with a first engaging portion 62 formed on the ejection cylinder portion 24 .

The second engaged portion 54 protrudes upward from the front end portion of the bottom wall 51d. The second engaged portion 54 is engaged from the front with a second engaging portion 63 formed on the vertical supply tube portion 21 . The second engaging portion 63 is formed on an extension piece 64 provided on the vertical supply tube portion 21 . The extension piece 64 extends rearward from the stepped portion 21b. The extension piece 64 extends in a cantilever manner with the vertical direction as the thickness direction. The second engaging portion 63 protrudes downward from the tip (rear end) of the extension piece 64 . In this embodiment, each wall 51a to 51d of the cover body 51 is formed thinner than the extension piece 64. As shown in FIG. Therefore, the extending piece 64 has higher rigidity than the walls 51a to 51d of the cover body 51. As shown in FIG. In addition, the extension piece 64 may be provided at an arbitrary position in the vertical supply tube portion 21 .

The second engaging portion 63 is formed in a triangular shape when viewed from the side. Specifically, the front surface of the second engaging portion 63 constitutes a body-side engaging surface 63m (see FIG. 3) extending perpendicularly to the extension piece 64. As shown in FIG. On the other hand, the rear surface of the second engaging portion 63 constitutes a riding surface 63n (see FIG. 3) that slopes upward toward the rear.

A rib 65 is provided at the front end of the extension piece 64 . The rib 65 protrudes downward from the center portion of the extending piece 64 in the left-right direction and extends in the front-rear direction. The protrusion height (downward protrusion amount) of the rib 65 from the extension piece 64 is greater than the protrusion height of the second engaging portion 63 . The rear edge of the rib 65 is spaced forward from the body-side engaging surface 63m of the second engaging portion 63 . The front edge of the rib 65 continues to the rear end of the vertical supply tube portion 21 . However, the rear edge of the rib 65 may be separated from the vertical supply tube portion 21 . The dimension of the extension piece 64 is smaller than the dimension of the second engaging portion 63 in the left-right direction.

As shown in FIGS. 2 and 3, the second engaged portion 54 is formed in a trapezoidal shape when viewed from the side. The rear surface of the second engaged portion 54 constitutes a cover-side engaging surface 54m facing the body-side engaging surface 63m of the second engaging portion 63 in the front-rear direction. The cover-side engaging surface 54m of the second engaged portion 54 approaches or contacts the body-side engaging surface 63m of the second engaging portion 63 from the front. On the other hand, the front surface of the second engaged portion 54 constitutes an anti-engagement surface 54n that extends obliquely upward toward the rear. In this embodiment, the lateral dimension of the second engaged portion 54 is larger than the dimension of the second engaging portion 63 .

The second engaged portion 54 is formed with a lightening recess 54a that opens on a surface of the second engaged portion 54 other than the cover-side engaging surface 54m. The lightening recess 54a opens on the upper surface 54p and the anti-engagement surface 54n of the second engaged portion 54 at the central portion of the second engaged portion 54 in the left-right direction. That is, the lightening recess 54a is a vertical groove that is recessed downward with respect to the upper surface 54p of the second engaged portion 54 and extends in the front-rear direction. The dimension of the lightening recess 54a is larger than that of the rib 65 and smaller than that of the second engaging portion 63 in the left-right direction.

In the state where the second engaged portion 54 is engaged with the second engaging portion 63, the rib 65 is inserted from behind into the lightening recess 54a. Of the outer surfaces of the ribs 65, the laterally outwardly facing laterally facing inner laterally facing inner laterally facing inner surfaces of the lightening recess 54a are close to or in contact with each other. The lateral movement of the cover 13 with respect to the ejector main body 10 is regulated by the outer surface of the rib 65 and the inner surface of the lightening recess 54 a coming close to each other or in contact with each other in the left-right direction.

Next, the action of the trigger type liquid ejector 1 configured as described above will be described. In the following description, it is assumed that each part of the ejector main body 10 is already filled with liquid.
As shown in FIG. 1, in order to eject liquid using the trigger type liquid ejector 1, first, the index finger or the middle finger is hooked on the trigger part 12 from the front, and the thumb is hooked on the mounting cap 22, and then the trigger type liquid is ejected. Grasp the ejector 1 . In this state, the trigger part 12 is pulled rearward. Then, the trigger portion 12 moves rearward against the biasing force of the elastic member 41, thereby causing the piston 32 to retreat. As a result, the inside of the cylinder 31 is pressurized, and the liquid stored in the cylinder 31 is pressure-fed into the communication path 36 . A portion of the liquid flowing through the communication path 36 pushes down the ball valve 28 by flowing into the vertical supply tubular portion 21 through the communication hole 21f. As a result, the communication between the inside of the container body A and the inside of the ejection tube portion 24 through the vertical supply tube portion 21 is blocked. On the other hand, part of the liquid flowing through the communication path 36 flows into the injection cylinder portion 24 . The liquid that has flowed into the ejection cylinder portion 24 flows into the nozzle member 11 through the relay member 25 and is ejected through the ejection holes 11a.

After the liquid is ejected, when the rearward pressing force applied to the trigger portion 12 is released, the restoring force of the elastic member 41 urges the trigger portion 12 forward to return to its original position. As the piston 32 moves forward along with this, the pressure in the cylinder 31 is reduced. As a result, the ball valve 28 rises, and the inside of the container body A and the inside of the cylinder 31 communicate with each other through the vertical supply tubular portion 21 and the communication path 36 . As a result, the liquid in the container body A is sucked into the vertical supply tubular portion 21 and introduced into the cylinder 31 through the communication path 36 .

Next, the action of assembling the cover 13 to the ejector main body 10 will be described. In the following description, the action of the second engaging portion 63 and the second engaged portion 54 will be mainly described. In the following description, portions of the trigger type liquid ejector 1 other than the cover 13 are collectively referred to as ejector body 10 and the like.
First, with the insertion opening 51p of the cover body 51 facing forward, the ejector body 10 and the like and the cover 13 are approached in the front-rear direction. Then, the ejector body 10 is inserted inside the cover 13 . Then, the ejector main body 10 is moved rearward within the cover 13 by the rail portion being guided by the ridge portion 52 . In the process of moving the ejector main body 10 and the like backward, the first engaged portion 53 climbs over the first engaging portion 62, so that the first engaged portion 53 is engaged with the first engaging portion 62 from the front. match. On the other hand, the second engaged portion 54 climbs over the second engaging portion 63 in the process of moving the ejector main body 10 and the like rearward, so that the second engaged portion 54 moves forward toward the second engaging portion 63 . engage from. Thereby, the cover 13 is attached to the ejector body 10 .

Here, as shown in FIG. 3, when the second engaged portion 54 climbs over the second engaging portion 63, the anti-engagement surface 54n of the second engaged portion 54 first moves toward the second engaging portion. 63 comes into contact with the riding surface 63n. In this state, when the ejector main body 10 and the like move rearward with respect to the cover 13, the anti-engaging surface 54n of the second engaged portion 54 and the riding surface 63n of the second engaging portion 63 slide against each other. do. As a result, the second engaged portion 54 is pushed downward, and the lower end portion of the rear wall 51c of the cover body 51 and the bottom wall 51d are elastically deformed downward. As the cover main body 51 is elastically deformed, the second engaged portion 54 is elastically displaced downward. As a result, the second engaged portion 54 climbs over the second engaging portion 63 as the ejector body 10 moves backward with respect to the cover 13 . After the second engaged portion 54 has passed over the second engaging portion 63, the cover main body 51 (the rear wall 51c and the bottom wall 51d) is restored and deformed. As a result, the cover-side engaging surface 54m of the second engaged portion 54 approaches or contacts the body-side engaging surface 63m of the second engaging portion 63 from the front, and the second engaged portion 54 engages the second engaging portion 63 from the front (outside in the opening direction).

In this embodiment, the configuration in which the cover main body 51 is elastically deformed when the second engaged portion 54 climbs over the second engaging portion 63 has been described, but the configuration is not limited to this. For example, the second engaged portion 54 may be elastically deformed so as to ride over the second engaging portion 63, and both the second engaged portion 54 and the cover body 51 may be elastically deformed. may Further, when the second engaged portion 54 rides over the second engaging portion 63, the extending piece 64 may be elastically deformed upward.

As described above, in the trigger-type liquid ejector 1 of the present embodiment, the second engaged portion 54 has a cover-side engaging surface facing the body-side engaging surface 63m of the second engaging portion 63 in the front-rear direction. 54m, and a counter-engaging surface 54n that faces the opposite side of the second engaging portion 63 and extends rearward as it goes upward. In addition, the second engaged portion 54 is formed with a lightening recess 54a that opens on a surface of the second engaged portion 54 other than the cover-side engaging surface 54m.
According to this configuration, since the second engaged portion 54 is formed with the lightening recess 54a, the protrusion height of the second engaged portion 54 from the inner surface of the cover body 51 (bottom wall 51d) is increased. Thus, even if the engagement margin between the second engaged portion 54 and the second engaging portion 63 is increased, the increase in volume of the second engaged portion 54 can be suppressed.
In particular, since the lightening recess 54a is open on a surface other than the cover-side engaging surface 54m of the second engaged portion 54, the engagement between the second engaged portion 54 and the second engaging portion 63 is prevented. You can definitely raise your bill.
As a result, the strength of engagement between the cover 13 and the ejector main body 10 can be ensured while suppressing an increase in weight.

Moreover, since the anti-engagement surface 54n of the second engaged portion 54 extends rearward as it goes upward, when the ejector body 10 is inserted into the cover body 51 through the insertion opening 51p, the The second engaged portion 54 smoothly climbs over the second engaging portion 63 . As a result, even if the projection height of the second engaged portion 54 from the inner surface of the cover main body 51 is increased, it is possible to ensure the ease of assembly of the cover 13 to the ejector main body 10 .

In this embodiment, the lightening recess 54a is a vertical groove extending in the front-rear direction, and the ejector main body 10 is provided with a rib 65 inserted into the lightening recess 54a.
According to this configuration, the movement of the cover 13 with respect to the ejector main body 10 is restricted by the outer surface of the rib 65 abutting against the inner surface of the lightening recess 54a. As a result, it is possible to suppress the unexpected release of the engagement between the second engaged portion 54 and the second engaging portion 63 . This facilitates maintaining the engaged state between the second engaged portion 54 and the second engaging portion 63 .

In the present embodiment, the lightening concave portion 54a is configured to be open at the anti-engagement surface 54n of the second engaged portion 54. As shown in FIG.
According to this configuration, when the ejector body 10 and the cover 13 are assembled, the ribs 65 are inserted into the lightening recesses 54a by inserting the ejector body 10 into the cover body 51 through the insertion openings 51p. As a result, it is possible to ensure the ease of assembly of the cover 13 with respect to the ejector main body 10 .

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other changes in configuration are possible without departing from the scope of the present invention. The present invention is not limited by the foregoing description, but only by the appended claims.
In the above-described embodiment, the case where the second engaged portion 54 formed on the bottom wall 51d of the cover body 51 is the engaged portion according to the present invention has been described, but the configuration is not limited to this. For example, the first engaged portion 53 may be the engaged portion according to the present invention.
Although the configuration in which the insertion opening 51p opens forward has been described in the above-described embodiment, the configuration is not limited to this configuration. The insertion opening 51p may be opened vertically or the like. In this case, the up-down direction is the opening direction, and one of the left-right direction and the front-rear direction is the first direction.

In the above-described embodiment, a configuration including only one engaged portion according to the present invention has been described, but the present invention is not limited to this configuration. The trigger-type liquid ejector 1 may include a plurality of engaged portions according to the present invention.
The cover 13 can be changed as appropriate as long as it is configured to cover the ejector main body 10 with the ejection holes 11a exposed.

In the above-described embodiment, the configuration in which the lightening recess 54a is open on the upper surface 54p and the anti-engagement surface 54n of the second engaged portion 54 has been described, but the configuration is not limited to this. As long as the lightening recess 54a is formed on a surface other than the cover-side engaging surface 54m of the second engaged portion 54, it may be open only on the upper surface 54p or only on the lateral side. When the lightening recess 54a is not formed on the surface facing the rib 65, when the cover 13 is assembled to the ejector main body 10, the rib 65 climbs over the second engaged portion 54 and enters the lightening recess 54a. It may be configured to fit.
In the above-described embodiment, the configuration in which one lightening concave portion 54a and one rib 65 are formed has been described, but the configuration is not limited to this. A plurality of lightening recesses 54a and ribs 65 may be formed.

In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the gist of the present invention, and the above-described modifications may be combined as appropriate.

1: trigger type liquid ejector 5: engaged portion 10: ejector body 11: nozzle member 11a: ejection hole 12: trigger portion 13: cover 26: pump portion 51: cover body 51p: insertion opening 54: second cover Engaging portion (engaged portion)
54a: lightening concave portion 54m: cover-side engaging surface (engaging surface)
54n: anti-engagement surface 63: second engagement portion (engagement portion)
65: Rib A: Container body

Claims (3)

an ejector body having a pump portion for pumping out the liquid contained in the container body;
a nozzle member attached to a front end portion of the ejector main body and having an ejection hole formed therein for ejecting the liquid delivered by the pump portion forward;
a trigger unit disposed so as to be movable rearward in a forward biased state for driving the pump unit;
a cover that covers the ejector body with the ejection hole exposed,
The cover is
a cover body having an insertion opening into which the ejector body is inserted and mounted on the ejector body through the insertion opening;
an engaged portion protruding from the inner surface of the cover body in a first direction crossing the opening direction of the insertion opening;
The engaged portion is
an engaging surface that faces the engaging portion provided on the ejector body in the opening direction and engages from the outside in the opening direction;
a counter-engagement surface facing outward in the opening direction and extending inward in the opening direction as the distance from the inner surface of the cover body in the first direction increases;
A trigger-type liquid ejector, wherein the engaged portion is formed with a lightening recess that opens to a surface of the engaged portion other than the engaging surface. The lightening recess is a vertical groove extending in the first direction,
2. The trigger type liquid ejector according to claim 1, wherein the ejector main body is provided with ribs inserted into the lightening recesses. 3. The trigger type liquid ejector according to claim 2, wherein the lightening recess is open on the anti-engagement surface.

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