JP2015066539A - Trigger type liquid discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liquid discharge device having a device for restoring repulsive force of a spring member that makes elastic restoration force act on a trigger.SOLUTION: There is provided a trigger type liquid discharge device characterized in that: a nozzle part G is rotatably installed in a front end part of an injection cylinder part B2; a longitudinally movable trigger E suspended from the injection cylinder part B2 is linked to a piston member C; a spring member F is also provided between the injection cylinder part B2 and the trigger E; an operation arm 50 is extended to the lateral outside from the nozzle part G, and is constituted so as to close a flow passage in the nozzle part G when this operation arm 50 exists in a nozzle closing position, and to open the nozzle when existing in a nozzle opening position; and pressing means P is provided for pressing the trigger E forward when rotating the operation arm 50 to the nozzle closing position from the nozzle opening position.

Description

  The present invention relates to a trigger type liquid ejection device.

  In the trigger type liquid discharge device, a trigger that can swing in the front-rear direction is suspended from the front part of the injection cylinder part that opens the nozzle hole on the tip side, and a part of this trigger is linked to the piston member of the pump mechanism, It is known that a plate spring (spring) is installed between the injection cylinder and the trigger, and the trigger is pulled backward to eject the liquid from the nozzle hole, and when the trigger is released, the trigger returns to its original position. (Patent Document 1).

JP 2006-204989 A

  In the thing of patent document 1, a leaf | plate spring will produce elastic fatigue while performing a trigger operation repeatedly, As a result of a strength (repulsive force) falling, there exists a possibility that a trigger may not return to an original position. If it becomes so, the quantity of the liquid sprayed by one trigger operation will fall.

  An object of the present invention is to provide a trigger type liquid ejection device having a mechanism for recovering a repulsive force of a spring member that applies an elastic restoring force to a trigger.

The first means is
The first check valve V1 is provided at the lower part of the vertical base cylinder part B1, and the injection cylinder part B2 from the upper part of the vertical base cylinder part B1 and the pump cylinder part B3 from the middle in the vertical direction of the vertical base cylinder part B1. A main body B that protrudes forward and has a second check valve V2 disposed in a vertical base cylinder portion between the injection cylinder B2 and the pump cylinder B3;
A nozzle part G that is rotatably attached to the front end part of the injection cylinder part B2, and capable of opening and closing the flow path by the rotation;
A trigger E hanging from the front of the injection cylinder B2 so as to be swingable in the front-rear direction;
A piston member C inserted into the pump cylinder B3 so as to be movable back and forth, and linked to the trigger E at the front end;
A spring member F that is installed between the injection cylinder B2 and the trigger E, and that exerts a forward urging force when the trigger E is pulled backward;
An operation arm 50 is extended from the nozzle part G to the outside of the side. When the operation arm 50 is in the nozzle closed position, the flow path in the nozzle part G is closed, and when the operation arm 50 is in the nozzle open position, the nozzle is Configured to be open,
When the operating arm 50 is rotated from the nozzle open position to the nozzle closed position, a pressing means P for pressing the trigger E forward is provided.

  As shown in FIG. 1, this means is an operation arm 50 attached to the nozzle part G in a trigger type liquid discharge apparatus in which the trigger is returned to the original position by a spring member F between the trigger E and the injection cylinder part B2. It is proposed to provide pressing means P that pushes the trigger E forward by rotating the. Thus, the trigger E is forcibly returned to the fixed position every time the trigger E is used. As a result, since the shape of the spring member can be brought close to the form at the time of design, it is possible to prevent a decrease in spray amount due to a decrease in the repulsive force of the spring member F.

The second means includes the first means, and the operation arm 50 includes an operation arm main body 52 extending substantially downward from the nozzle portion G when viewed from the front when the operation arm 50 is in the nozzle closed position, and An engagement portion 56 formed so as to protrude from the front portion 54 of the arm body 52 to the rear side of the trigger E,
The pressing means P is formed by forming an inclined surface 58 on the front side of the engaging portion 56, and the inclined surface 58 presses the trigger E when the engaging portion 56 enters the rear surface side of the trigger E. .

  In this means, the pressing means P is formed by an inclined surface 58 of the engaging portion 56 protruding from the tip portion 54 of the operation arm 50 as shown in FIG. Accordingly, when the operation arm 50 is returned from the nozzle open position to the nozzle closed position, the inclined surface 58 gradually moves the rear surface of the trigger E as shown in FIG. 4 (A) → FIG. 4 (B) → FIG. 4 (C). To return to the home position.

The third means includes the second means, and a step portion 60 is formed between the front end side of the inclined surface 58 of the engaging portion 56 and the operation arm main body 52, and the operation arm 50 is in the nozzle closed position. The rear surface of the trigger E is provided so as to come into contact with the stepped portion 60.

  For example, as shown in FIGS. 4A to 4C, this means proposes to provide a stepped portion 60 on the front side of the inclined surface 58 of the engaging portion 56. Thereby, the operation | work which returns the trigger E to a fixed position can be performed reliably.

The fourth means has the second means or the third means, and when the operation arm 50 is in the nozzle closed position, the rear side of the engaging portion 56 is brought into contact with the front surface of the piston member C. The engaging portion 56 is inserted as a stopper between the piston member C and the trigger E.

  In this means, the rear portion of the engaging portion 56 is brought into contact with the piston member C as shown in FIG. At this time, since the engaging part 56 is interposed as a stopper between the piston member C and the trigger E, the trigger E can be pushed forward more reliably than in the case where it is not in contact with the piston member.

According to the first aspect of the invention, since the pressing means P that presses the trigger E forward when the operation arm 50 is rotated from the nozzle open position to the nozzle closed position is provided, the deformation distortion of the spring member F is reduced. Thus, the elastic force of the spring member F can be recovered, and hence the spray pressure can be stabilized.
According to the invention relating to the second means, since the pressing means P is constituted by the inclined surface 58 formed on the front side of the engaging portion 56 of the operation arm 50, the contact of the engaging portion 56 with the rear surface of the trigger E is soft. And the feeling of use is not impaired.
According to the third aspect of the invention, since the rear surface of the trigger E contacts the stepped portion 60 of the engaging portion 56 when the operation arm 50 is in the nozzle closed position, the contact location is changed from the inclined surface 58 to the stepped portion. The feel when moving to 60 can recognize that the nozzle is completely closed.
According to the fourth aspect of the invention, since the engaging portion 56 is inserted as a stopper between the piston member C and the trigger E, the trigger E can be pressed forward more reliably.

It is a side view of the trigger type liquid ejector which concerns on 1st Embodiment of this invention. It is a front view of the trigger type liquid ejector of FIG. It is a partial expanded sectional view of the trigger type liquid ejector of FIG. It is a figure explaining the effect | action of an engaging part in the process in which the operation arm of the trigger type liquid ejector of FIG. 1 rotates from a nozzle open position to a nozzle closed position, seen from below. The state close to the nozzle opening position, FIG. 5B shows the state approaching the nozzle closing position, and FIG. 5C shows the state reaching the nozzle closing position. It is a longitudinal cross-sectional view of the nozzle open state of the trigger type liquid ejector of FIG.

  1 to 5 show a trigger type liquid ejector according to a first embodiment of the present invention. This trigger type liquid discharger includes a mounting member A, a discharger body B, a piston member C, a cover member D, a trigger E, a spring member F, and a nozzle part G. Each of these members can be formed of, for example, a synthetic resin or a metal. In this specification, “front” refers to the direction in which the liquid protrudes, and “rear” refers to the opposite side.

  The mounting member A is formed by projecting the inward flange 4 inward from the upper end portion of the mounting cylinder portion 2. The mounting cylinder portion 2 can be fitted (screwed in the illustrated example) to the mouth / neck portion of the container body, and an outward flange 8 and a packing 10 described later between the upper end surface of the mouth / neck portion and the inward flange 4. It is provided so that it can be pinched.

  The discharger main body B protrudes forward from the upper part of the vertical base cylinder part B1 and the pump cylinder part B3 from the middle part in the vertical direction of the injection cylinder part B2, respectively, and in the lower part of the vertical base cylinder part B1. The first check valve V1 and the second check valve V2 are arranged in the base cylinder portion between the pump cylinder part B3 and the injection cylinder part B2.

  The illustrated vertical base tube portion B1 includes an inner tube portion 6 and an outer tube portion 16 (see FIG. 1).

  The inner cylindrical portion 6 is formed by hanging the large-diameter cylindrical portion 6c from the small-diameter cylindrical portion 6a via the outward flange-like top wall portion 6b. An outward flange 8 protrudes from the outer surface of the large-diameter cylindrical portion 6 c, and a packing 10 is attached to the lower surface of the outward flange 8. The first vent hole 12 is opened in the outward flange-like top wall portion 6b. A suction pipe 14 is suspended from the small diameter cylindrical portion 6a of the inner cylindrical portion.

  The outer cylinder part 16 is open at the lower end and closed at the upper end, and covers the inner cylinder part 6 above the outward flange 8. The lower part 16a of the outer cylinder part 16 is increased in diameter and is fitted to the outer surface of the large diameter cylinder part 6c of the inner cylinder part 6. A second check valve V <b> 2 is provided in the upper portion of the outer cylinder portion 16.

  In the preferred illustrated example, the injection cylinder part B2 communicates with the inside of the vertical base cylinder part B1, and protrudes forward from the upper part of the vertical base cylinder part B1, and the front part of the horizontal tube part 20 The sleeve tube portion 22 is fitted to the outer surface and extends forward from the front end of the horizontal tube portion 20.

  The pump cylinder part B3 includes a storage cylinder part 24 protruding forward from the vertical base cylinder part B1, and a fitting cylinder fitted in the storage cylinder part 24 with the front surface closed and the rear surface closed by the partition wall part 28. Part 26. The central portion of the partition wall portion 28 protrudes forward. Further, a liquid passage hole 30 is formed in the outer peripheral portion of the partition wall portion 28, and the inside of the pump cylinder portion B3 and the inside of the vertical base cylinder portion B1 are communicated with each other through this liquid passage hole. The lower part of the storage cylinder part 24 is connected to the front wall part of the lower part 16a of the outer cylinder part. A second ventilation hole 25 is opened at the lower portion of the storage cylinder portion 24. A third vent hole 27 that communicates with the second vent hole 25 and communicates with the outside air when the piston member C is retracted is opened at an appropriate position of the fitting cylinder portion 26.

  The piston member C has its rear half part fitted in the pump cylinder part B3 so as to be movable back and forth. The illustrated piston member C includes a main cylindrical body 32 whose front end is closed by a blocking wall portion 34 and whose rear end is opened, and an annular sliding portion 38 attached to the rear outer surface of the main cylindrical body 32. An engaging projection 36 projects forward from the blocking wall 34.

  The cover member D is attached so as to cover the outer surface of the discharger main body B.

  The trigger E hangs downward from the injection cylinder part B2. The upper end of the trigger E is pivoted in the front-rear direction of the trigger E. The illustrated trigger E has a pair of side plate portions 42 protruding rearward from both sides of the front plate portion 40.

  The spring member F is configured such that when the trigger E is pulled backward between the injection cylinder B2 and the trigger E, the trigger is returned to the original position by the repulsive force of the spring member. The spring member F can be formed as a leaf spring. The spring member can be formed as a resin spring. In a preferred illustrated example, a pair of left and right spring members F are provided as shown in FIG. The spring member in the illustrated example has a loop shape including two arc-shaped spring portions 43a and 43b. The leg piece 30c suspended from the lower portion of the loop is linked to the trigger E and the upper end of the loop is used as the injection cylinder portion. It is fixed. However, the shape can be changed as appropriate.

  The nozzle part G is attached to the front end of the injection cylinder part B2 so as to be rotatable around the rotation axis shown in FIG. The nozzle part G is provided so that an internal flow path can be opened and closed by the rotation. A nozzle hole 44 is opened in front of the nozzle part G. A recess 48 is formed in the lower rear end of the outer peripheral wall 46 of the nozzle part G.

  The nozzle part G is bent at a certain angle with respect to the front part from the front part of the operation arm 50 projecting from the outer peripheral surface of the nozzle part G to the outside as viewed from the front. And an engaging portion 56 projecting therefrom. The length and bending angle of the engaging portion 56 are set so that the engaging portion 56 is hidden behind the trigger E when viewed from the front when the operating arm 50 is rotated downward (FIG. 2). reference).

  The nozzle portion G is opened when the operation arm 50 is rotated downward, and the flow path in the nozzle portion G is opened. When the operation portion 50 is rotated in a certain other direction (upward in the illustrated example), the nozzle portion G The flow path in the part G is configured to open.

  In the present embodiment, the operation arm 50 includes an operation arm main body 52 (in the illustrated example, a band plate-like portion) extending outward and a front portion 54 extending rearward from the operation arm main body 52. The engaging portion 56 is inserted between the trigger E and the piston member C from the latter half of the front portion 54.

  The operation arm main body 52 does not need to have a straight shape when viewed from the front. In the illustrated example, as shown in FIG. 2, the operation arm main body 52 is inclined obliquely outward at its root portion, and below the side plate portion 42 of the trigger E. It extends vertically along.

  The engaging portion 56 abuts the rear end side of the engaging portion against the closing wall portion 34 of the piston member C. Further, the front end side of the engaging portion 56 is an inclined surface 58 from the front outer side to the rear inner side as seen from above (see FIG. 1 or FIG. 5), thereby rotating the operation arm 50 from the nozzle closed position to the nozzle open position. Accordingly, the pressing means P is configured to gradually press the rear surface of the trigger E forward. A stepped portion 60 is provided on the tip side of the inclined surface 58.

  FIG. 4 shows a state where the contact portion of the engaging portion 56, the trigger 56, and the piston member C is looked up from below. Note that the engagement portion between the trigger 56 and the engagement protrusion 36 of the piston member C is omitted for the sake of drawing. In FIG. 4A, the operation arm 50 is located near the nozzle opening position, and the engaging portion 56 first locks the front surface of the piston member C at this stage. In FIG. 4B, the operation arm 50 approaches the nozzle closed position. Here, the engaging portion 56 starts to spread the trigger E forward. In FIG. 4C, the operation arm 50 reaches the nozzle closed position, and the rear surface of the trigger E is locked to the stepped portion 60. The engaging portion 56 pushes the trigger E sufficiently forward.

  In the illustrated example, the engaging portion 56 is formed as a plate portion that inclines upward and inward in the nozzle closed state shown in FIG. Further, the inner end (free end) 57 side of the engaging portion 56 is formed in a rectangular shape having substantially the same width (see FIG. 4).

  In the above configuration, the operation arm 50 is moved from the nozzle closed position (see FIG. 1) to the nozzle open position (see FIG. 5) with the liquid ejection device mounted on the container body, and then the trigger E is pulled backward. When the liquid in the pump cylinder B3 is sprayed from the nozzle hole 44 through the second check valve V2 and the trigger E is released, the piston member C moves forward by the repulsive force (elastic restoring force) of the spring member F. The liquid in the container enters the pump cylinder B3 through the first check valve V1. Next, when the operation arm 50 is moved to the nozzle closing position, the flow path in the nozzle portion G is closed. At this time, the inclined surface 58 of the engaging portion 56 of the operation arm 50 pushes the rear surface of the trigger E, so that the trigger E is completely returned to the home position. Thereby, the fall of the repulsive force of a spring member is prevented.

DESCRIPTION OF SYMBOLS 2 ... Installation cylinder part 4 ... Inward flange 6 ... Inner cylinder part 6a ... Small diameter cylinder part 6b ... Outward flange-like top wall part 6c ... Large diameter cylinder part 8 ... Outward flange 10 ... Packing 12 ... 1st ventilation hole 14 ... Suction pipe 16 ... Outer cylinder part 16a ... Lower part 20 ... Horizontal pipe part 22 ... Sleeve pipe part 24 ... Storage cylinder part 25 ... Second vent hole 26 ... Fit cylinder part 27 ... Third vent hole 28 ... Partition wall part DESCRIPTION OF SYMBOLS 30 ... Liquid passage hole 32 ... Main cylinder 34 ... Blocking wall part 36 ... Engagement protrusion 38 ... Sliding part 40 ... Front plate part 42 ... Side plate part 44 ... Nozzle hole 46 ... Outer peripheral wall 48 ... Depression 50 ... Operation arm 52 ... Operation arm main body 54 ... Tip part 56 ... Engagement part 57 ... Inner end 58 ... Inclined surface 60 ... Stepped part A ... Mounting member B ... Discharger main body B1 ... Vertical base cylinder part B2 ... Injection cylinder part B3 ... Pump cylinder Part C ... Piston member D ... Cover member E ... Trigger F ... Spring part G ... nozzle unit P ... pressing means V1 ... first check valve V2 ... second check valve

Claims (4)

The first check valve (V1) is provided at the lower part of the vertical base cylinder part (B1), the injection cylinder part (B2) is inserted from the upper part of the vertical base cylinder part (B1), and the vertical direction of the vertical base cylinder part (B1). The pump cylinder part (B3) protrudes forward from the intermediate part, and the second check valve (V2) is provided at the vertical base cylinder part between the injection cylinder part (B2) and the pump cylinder part (B3). Disposed dispenser body (B),
A nozzle part (G) which is rotatably attached to the front end part of the injection cylinder part (B2) and can open and close the flow path by the rotation;
A trigger (E) suspended from the front of the injection cylinder (B2) so as to be swingable in the front-rear direction;
A piston member (C) which is inserted into the pump cylinder (B3) so as to be movable back and forth, and whose front end is linked to the trigger (E);
A spring member (F) that is installed between the injection cylinder (B2) and the trigger (E) and that exerts a forward urging force when the trigger (E) is pulled backward;
An operating arm (50) is extended from the nozzle part (G) to the outside of the side. When the operating arm (50) is in the nozzle closing position, the flow path in the nozzle part (G) is closed, and the nozzle Configure the nozzle to open when in the open position,
A trigger type liquid discharge apparatus comprising a pressing means (P) for pressing the trigger (E) forward when the operating arm (50) is rotated from the nozzle open position to the nozzle closed position. When the operation arm (50) is in the nozzle closed position, the operation arm main body (52) extending substantially downward from the nozzle portion (G), as viewed from the front, and the tip of the operation arm main body (52) ( 54) and an engaging portion (56) formed so as to enter the rear side of the trigger (E),
The pressing means (P) forms an inclined surface (58) on the front side of the engaging portion (56), and the inclined surface (58) is directed to the rear surface side of the trigger (E) of the engaging portion (56). 2. The trigger type liquid discharge device according to claim 1, wherein the trigger type liquid discharge device is configured by pressing the trigger (E) by rushing.   A stepped portion (54) is formed between the front end side of the inclined surface (58) of the engaging portion (56) and the operation arm main body (52), and is triggered when the operation arm (50) is in the nozzle closed position. 3. The trigger type liquid ejector according to claim 2, wherein the rear surface of (E) is provided so as to abut on the step portion (54). When the operation arm (50) is in the nozzle closed position, the rear side of the engaging portion (56) is brought into contact with the front surface of the piston member (C), and the engaging portion (56) is brought into contact with the piston member (C). The trigger type liquid discharge device according to claim 2 or 3, wherein the trigger type liquid discharge device is inserted as a stopper between the trigger (E) and the trigger (E).