KR102426872B1 - Elastic launching apparatus - Google Patents

Abstract

The present invention relates to an elastic launching apparatus comprising: a housing with a space in a body; a launching unit storing a confetti; a first rubber strap for launching the launching unit; and a fixing unit separable from the housing. A first fixing hole is placed on an outer side surface of the housing. In the space, placed is a support unit which is formed by extending and folding an outer side surface of the housing into the space and has a pair of first holes. On the launching unit, placed is a second fixing hole. On a lower end of the launching unit, placed are a pair of second holes. The first rubber strap connects the pair of first holes and the pair of second holes. When the launching unit is stored in the housing, the first rubber strap stretches, and the launching unit is fixed while being stored in the housing as the fixing unit is inserted into and engaged with the first fixing hole and the second fixing hole with the first rubber strap stretching. The launching unit is configured to spray the confetti by protruding towards an upper surface of the housing by the elasticity of the first rubber strap when the fixing unit is separated from the housing. The present invention aims to provide an elastic launching apparatus which is capable of preventing the performance from being greatly lowered even if the elastic launching apparatus is stored or reused for a long time.

Description

Elastic launch device {ELASTIC LAUNCHING APPARATUS}

The present invention relates to an elastic launch device, and more particularly, to an elastic launch device used as a card or prop used in situations such as celebrations or commemorative events.

The elastic launch device can be generally used to enhance the atmosphere of the site at events such as celebrations or parades. The launch unit can store various items such as confetti, often called confetti or pollen, congratulatory messages, letters, cash, photos, etc.

On the other hand, most launch devices use the power of compressed fluid to launch items stored inside the device, and in general, the compressed air is stored inside the device, and when used, the compressed air is ejected and the item is used with that power. used as a method of launching However, these devices have a high frequency of occurrence of defective products due to weak air compression or durability of the device when stored for a long time.

Korean Patent Registration No. 10-1176973

It is an object of the present invention to provide a device for firing an item without using a compressed fluid.

An elastic launch device according to an embodiment of the present invention, a housing having a space formed inside the body; a launch unit for storing confetti; a first rubber band for firing the firing unit; and a fixing part separable from the housing, a first fixing hole is provided on an outer surface of the housing, and one outer surface of the housing extends into the space and is folded in the space, and a pair of A support part having a first hole of The hole and the pair of second holes are connected, and the first rubber band is stretched when the firing unit is accommodated in the housing, and the firing unit is, in a state in which the first rubber band is stretched, the fixing unit is fixed to the first As it is fitted into the hole and the second fixing hole, it is fixed in a state accommodated in the housing, and the launch part is, when the fixing part is separated from the housing, the upper surface of the housing according to the elasticity of the first rubber band. It is configured to spray the confetti while protruding to.

Embodiments of the disclosed invention may have effects including the following advantages. However, since it does not mean that the disclosed embodiments of the invention should include all of them, the scope of the disclosed invention should not be construed as being limited thereby.

Since the elastic launch device according to an embodiment of the disclosed invention fires the launcher using the elasticity of a rubber band without gunpowder, it can be used indoors, and can be used safely by children. In addition, since a separate fluid pressure means is not used, there is an effect of occupying a small volume. In addition, there is an advantage that the performance is not significantly deteriorated even when stored for a long time or reused.

Since the elastic launch device according to an embodiment of the disclosed invention is detachable from the housing, even if the fixing part is damaged or lost, it is possible to continue using the existing housing by using a new fixing part.

The elastic launch device according to an embodiment of the disclosed invention includes the first and second locking parts that brake the launcher when the launcher is fired, so that the confetti can be strongly sprayed by the force that brakes the launcher. .

Since the elastic launch device according to an embodiment of the disclosed invention includes at least one extension that extends outside the width of the housing when the launch unit protrudes toward the upper surface of the housing, the extension can be accommodated in the housing by the width of the housing. Various elements can be expressed without restrictions. In addition, the visual effect in which the expansion part is deployed can synergize with the visual effect in which the launch part protrudes, thereby amplifying the aesthetic feeling given to the user.

The launch unit of the elastic launch device according to an embodiment of the disclosed invention includes an envelope between two overlapping surfaces, and further includes a guide paper positioned in the envelope and extending over the upper surface of the housing, so that the user puts it in the envelope according to the position of the guide paper. It has the effect of being able to easily put the items you want.

In the elastic launch device according to an embodiment of the disclosed invention, the color and the color exposed to the outside of the housing through the first fixing hole in a state in which the emission part protrudes from the upper surface of the housing in the region of the lower end of the second fixing hole among the emission parts Since it is configured to have different colors, when reusing the elastic launch device, the user can easily determine how far the launcher needs to be moved to the lower end in order to match the positions of the first fixing hole and the second fixing hole.

1 is a view showing the external shape of the elastic launch device according to the present invention.
2A shows an exemplary exploded view of a housing of an elastic launch device according to the present invention;
2B shows an exemplary exploded view of a housing of an elastic launch device according to the present invention.
Figure 3a shows an exemplary exploded view of the launch part of the elastic launch device according to the present invention.
Figures 3b and 3c show the action of the first locking portion and the second locking portion of the elastic launch device according to the present invention.
4 is a view showing the internal structure of the elastic launch device according to the present invention in a state in which the launch unit is accommodated in the housing.
5 is a view showing the appearance of the elastic launch device according to the present invention in a state in which the launch unit is accommodated in the housing.
6 is a view showing a fixing portion of the elastic launch device according to the present invention.
7 is a view showing that the launch unit protrudes from the upper surface of the housing in the elastic launch device according to the present invention.
8 is a view showing a state in which the launch unit protrudes from the upper surface of the housing in the elastic launch device including the extension unit according to the present invention.
9 is a view showing a state in which the launch unit is accommodated in the housing in the elastic launch device including the extension, according to the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, A, and B may be used to describe various components, but the components are not limited by the above terms, and only for the purpose of distinguishing one component from other components. used only as For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

A singular expression in terms used herein should be understood to include a plural expression unless the context clearly dictates otherwise. And terms such as "comprising" mean that the specified feature, number, step, operation, component, part, or a combination thereof exists, but one or more other features or number, step operation component, part It is to be understood that this does not exclude the possibility of the presence or addition of or combinations thereof.

Prior to a detailed description of the drawings, it is intended to clarify that the classification of the constituent parts in the present specification is merely a division according to the main function that each constituent unit is responsible for. That is, two or more components to be described below may be combined into one component, or one component may be divided into two or more for each more subdivided function.

In addition, each of the constituent units to be described below may additionally perform some or all of the functions of other constituent units in addition to the main function it is responsible for. Of course, it can also be performed by being dedicated to it. Therefore, the existence or non-existence of each component described through the present specification should be interpreted functionally.

1 is a view showing the external shape of the elastic launch device according to the present invention. Referring to FIG. 1 , the elastic launch device includes a housing 110 , a first fixing hole 120 , and a launch unit 200 .

The elastic launching device according to the present invention solves the problems of the conventional injection device using the pressure of a fluid and can be used more conveniently. For a simple structure, the entire configuration of the launch device may be formed of paper coated with synthetic resin. The synthetic resin is used for the purpose of preventing the paper from getting wet or contaminated with water, and may be coated by spraying on the surface of the paper or may be coated by attaching a film. In addition, certain materials may be coated to maintain durability when the launch device is reused.

The shape of the housing is not limited as long as a space is formed in the body to accommodate the launcher and the upper surface is open so that the launcher can protrude out of the housing. For example, as shown in FIG. 1 , the outer shape of the housing may be in the form of an envelope. Of course, unlike the example shown in FIG. 1 , the housing may be manufactured in a shape such as a polyhedron of another shape, such as a hexahedron or an octahedron, or a spherical shape.

The launch unit may store various items therein, or may display a message. According to various embodiments, the launch unit may have a structure in which two surfaces are overlapped. According to various embodiments, the firing unit may include an envelope (not shown) positioned between two overlapping surfaces and having an open top surface. According to various embodiments, the firing unit may further include a guide paper (not shown) positioned in the envelope and extending over the upper surface of the housing. The user may store items such as letters, photos, and cash inside the envelope according to the location of the guide paper. According to various embodiments, the launch unit may store confetti between two overlapping surfaces, and the confetti may be sprayed by elasticity when the launch unit protrudes. In various other embodiments, the launcher may not store confetti therein.

2A shows an exemplary exploded view of a housing of an elastic launch device according to the present invention; In FIG. 2A, a blue line indicates an outline and an incision, and a red line indicates a line for folding.

Referring to FIG. 2A , the housing first surface 140 and the housing second surface 145 are surfaces exposed to the outside. The housing first surface 140 includes a first fixing hole. The elastic launch device may include a support portion 130 formed by extending the housing first surface 140 and folding into the housing space. The support part 130 may be positioned between the housing first surface 140 and the housing second surface 145 . The support 130 may include first holes 150 and 160 for connecting the first rubber bands.

The elastic launch device may further include a first locking part 135 formed by extending the support 130 and folding it into the housing space. The first locking part 135 is configured to brake the firing part protruding from the upper surface of the housing after the fixing part is separated from the housing. The action of the first locking part 135 will be described later with reference to FIGS. 3B and 3C .

According to various embodiments, the support part 130 may be attached to the first adhesive part 146 and fixed to the housing second surface 145 . According to various embodiments, the support part 130 may be attached to at least a portion of the housing second surface 145 in addition to the first adhesive part 146 to serve as an inner surface of the housing second surface 145 .

The first adhesive part 146 and the second adhesive part 147 are parts where an adhesive is used to fix the shape of the housing, and the positions of the first adhesive part 146 and the second adhesive part 147 are other than those shown in FIG. 2A . It will be appreciated by those skilled in the art that various modifications are possible.

2B shows an exemplary exploded view of a housing of an elastic launch device according to the present invention. In FIG. 2B , a blue line indicates an outline and an incision line, and a red line indicates a line for folding.

Referring to FIG. 2B , the housing first surface 140 and the housing second surface 145 are surfaces exposed to the outside. The housing first surface 140 includes a first fixing hole. The elastic launch device may include a support portion 130 formed by extending the housing second surface 145 and folding into the housing space. The support part 130 may be located in a space between the housing first surface 140 and the housing second surface 145 . The support 130 may include first holes 150 and 160 for connecting the first rubber bands.

The elastic launch device may further include a first locking portion 135 formed by extending the housing first surface 140 and folding it into the housing space. The first locking part 135 is configured to brake the firing part protruding from the upper surface of the housing after the fixing part is separated from the housing. The action of the first locking part 135 will be described later with reference to FIGS. 3B and 3C .

According to various embodiments, the support part 130 may be attached to at least a portion of the housing second surface 145 in addition to the first adhesive part 146 to serve as an inner surface of the housing second surface 145 .

The first adhesive part 146 and the second adhesive part 147 are parts where an adhesive is used to fix the shape of the housing, and the positions of the first adhesive part 146 and the second adhesive part 147 are other than those shown in FIG. 2B . It will be appreciated by those skilled in the art that various modifications are possible.

Figure 3a shows an exemplary exploded view of the launch part of the elastic launch device according to the present invention. In FIG. 3A , a blue line indicates an outline and an incision line, and a red line indicates a line for folding.

Referring to FIG. 3A , the launch unit may have a structure in which the first surface 201 of the launch unit and the second surface 202 of the launch unit overlap. When the first surface 201 of the launch unit and the second surface 202 of the launch unit overlap, the hole 211 and the hole 212 overlap to form one 210 of the pair of second holes, and the hole ( 221 ) and the hole 222 may overlap to form the other 220 of the pair of second holes. The second surface 202 of the launch unit may include a second fixing hole 240 . By cutting the lower end of the first surface 201 of the firing unit, the second stopping unit 203 may be formed. The second locking part 203 is configured to brake the firing part protruding from the upper surface of the housing after the fixing part is separated from the housing. The action of the second locking part 203 will be described later with reference to FIGS. 3B and 3C .

Figures 3b and 3c show the action of the first locking portion and the second locking portion of the elastic launch device according to the present invention.

Figure 3b shows the action of the first locking portion and the second locking portion of the resilient launch device in which the housing of Figure 2a and the launcher shown in Figure 3a are used; As described above in FIG. 2A , the first locking part 135 extends from the support part 130 and is folded into the housing. As described above in FIG. 3A , the second locking part 203 formed by cutting the lower end of the first surface 201 of the launcher is formed by overlapping the first surface 201 of the launcher and the second surface 202 of the launcher. It is integrally connected with the formed launch part. As will be described later, when the fixing part 300 is separated from the housing, the launch part protrudes from the upper surface of the housing. The launch unit continues to move upward until the second locking part 203 is caught by the first locking part 135 , and then, as the second locking part 203 is caught by the first locking part 135 , it no longer moves upward. It cannot move and stops moving. In other words, the first locking part 135 and the second locking part 203 may brake the firing part protruding from the upper surface of the housing by the second locking part 203 being caught by the first locking part 135 .

Figure 3c shows the action of the first locking portion and the second locking portion of the resilient launch device in which the housing of Figure 2b and the launcher shown in Figure 3a are used; As described above in FIG. 2B , the first locking part 135 extends from the housing first surface 140 and is folded into the housing. As described above in FIG. 3A , the second locking part 203 formed by cutting the lower end of the first surface 201 of the launcher is formed by overlapping the first surface 201 of the launcher and the second surface 202 of the launcher. It is integrally connected with the formed launch part. As will be described later, when the fixing part 300 is separated from the housing, the launch part protrudes from the upper surface of the housing. The launch unit continues to move upward until the second locking part 203 is caught by the first locking part 135 , and then, as the second locking part 203 is caught by the first locking part 135 , it no longer moves upward. It cannot move and stops moving. In other words, the first locking part 135 and the second locking part 203 may brake the firing part protruding from the upper surface of the housing by the second locking part 203 being caught by the first locking part 135 .

4 is a view showing the internal structure of the elastic launch device according to the present invention in a state in which the launch unit is accommodated in the housing. Referring to FIG. 4 , the launch unit 200 may include a second fixing hole 240 and a pair of second holes 210 and 220 .

The first rubber band 230 connects the pair of first holes 150 and 160 and the pair of second holes 210 and 220 shown in FIG. 2 , and as shown in FIG. 6 , the launch part of the housing It may have the shortest length in a state protruding to the upper surface. In the present specification, that the rubber band connects the specific first hole and the specific second hole means that the rubber band forms a closed loop passing the first hole and the second hole, or the rubber band with both ends open is the first hole and the second hole. means passing through

As shown in FIG. 4 , the first rubber band may be stretched when the launch unit is accommodated in the housing. 5 is a view showing the appearance of the elastic launch device according to various embodiments of the present invention in a state in which the launch unit is accommodated in the housing. 5 is a view showing a fixing portion of the elastic launch device according to the present invention. The launch part may be accommodated in the housing as the fixing part 300 is fitted into the first fixing hole and the second fixing hole in a state in which the first rubber band is stretched. In a state where the position of the second fixing hole coincides with the position of the first fixing hole, the fixing part is fitted into the first fixing hole and the second fixing hole, so that the firing part is fixed in a state accommodated in the housing despite the elastic force of the first rubber band. can

The elastic launch device may be stored and distributed in the state shown in FIGS. 4 and 5 , that is, in a state in which the launch part is received and fixed in the housing. The state in which the launch unit is accommodated and fixed inside the housing may be expressed as a state before the elastic launch device is used.

6 is a view showing a fixing portion of the elastic launch device according to the present invention. Referring to FIG. 6 , according to various embodiments, it may be folded along a first line (a dotted line in FIG. 6 ), and the fixing part may be divided into a first area and a second area with the first line as a boundary. The first region of the fixing part (a rectangular part in FIG. 6 ) is fitted into the first fixing hole and the second fixing hole, and is positioned inside the housing when the firing part is fixed while being accommodated in the housing. A second region of the fixing portion (a semicircular portion in FIG. 6 ) is exposed outside the housing when the firing portion is fixed while being accommodated inside the housing.

7 is a view showing that the launch unit protrudes from the upper surface of the housing in the elastic launch device according to the present invention.

As the fixing part is separated from the housing, that is, separated from the first fixing hole and the second fixing hole, the launch part may protrude toward the upper surface of the housing by the elastic force of the first rubber band. As in the above example, when the body of the same shape as the firing unit is stacked in two layers and Confetti is stored between the overlapping bodies, the firing unit protrudes by the elastic force of the first rubber band and at the same time constitutes the firing unit The confetti stored between the first surface 201 and the second surface 202 may be sprayed in the air as the first surface 201 and the second surface 202 are separated from each other.

The user's separation of the fixture from the housing can be expressed as using an elastic launch device. In order to recycle the device once used, the user pushes the launcher into the housing to match the second fixing hole of the launcher with the first fixing hole of the housing by fitting the fixing part into the first and second fixing holes. , it is possible to fix the firing unit in a state accommodated inside the housing.

According to various embodiments, the fixing part may be formed of a plastic material. For example, the fixing part may be formed of a plastic material such as polyethylene terephthalate (PET), polypropylene (PP), poly vinyl chloride (PVC), or acrylic. According to various embodiments, the material of the fixing part is not limited as long as it is a material that can be folded and has a hardness greater than or equal to a critical value in addition to plastic. Since the fixing portion has a hardness greater than or equal to a threshold value, damage to the fixing portion can be prevented when the elastic launch device is to be recycled.

According to various embodiments, the housing may be formed of paper coated with a synthetic resin. Even if the housing is formed of paper coated with synthetic resin, the fixing part having a hardness greater than a threshold is fitted into the hole formed in the housing and the launch part, and there is no need to deform or move a part of the housing, so the possibility of damage to the housing is low .

According to various embodiments, the housing may be formed of paper not coated with synthetic resin or a material other than paper, for example, a plastic material such as PET.

According to various embodiments, the area at the bottom of the second fixing hole of the launch unit may have a color different from that used for the area corresponding to the first fixing hole among the third surface, which is one of the inner surface of the housing and both sides of the support part. have. The third surface is a surface exposed to the outside of the housing through the first fixing hole in a state in which the launch part protrudes from the upper surface of the housing. In the structure of FIG. 2A , the third surface is a surface facing the housing first surface 140 among both surfaces of the support part 130 . In the structure of FIG. 2B , the third surface is an inner surface of the housing second surface 145 that is not exposed outside the housing.

As described above, when the user intends to recycle the elastic launch device, the second fixing hole must match the first fixing hole. By configuring the color of the region at the bottom of the second fixing hole of the launch unit to be different from the color of the region corresponding to the first fixing hole among the third surfaces, the second fixing hole is inserted into the first fixing hole while the user moves the launch unit. It is easy to figure out how far down the launcher must be moved to match the . For example, when the user sees the color of the region corresponding to the first fixing hole among the third surfaces through the first fixing hole, the lower portion of the second fixing hole of the launch unit is located above the first fixing hole Therefore, it means that the launcher has to be moved to the bottom a lot. For example, when the user sees the color of the area at the bottom of the second fixing hole among the launchers through the first fixing hole, the second fixing hole is located at the upper end of the first fixing hole, but is close to the first fixing hole. This means that the second fixing hole can be matched with the first fixing hole by moving the launcher to the bottom a little further. For example, when the user sees the second fixing hole through the first fixing hole, it means that the second fixing hole coincides with the first fixing hole.

8 is a view showing a state in which the launch unit protrudes from the upper surface of the housing in the elastic launch device including the extension unit according to the present invention. The elastic launch device may further include at least one extension and a second elastic band 270 . Although it is illustrated in FIG. 8 that two extension parts of the first extension part 410 and the second extension part 420 are included, the number of extension parts is not limited according to various embodiments.

The launch unit may further include a pair of third holes 250 and 260 . The at least one extension may include a pair of fourth holes, respectively. Referring to FIG. 8 , the first extension 410 includes a pair of fourth holes 411 and 412 , and the second extension 420 includes a pair of fourth holes 421 and 422 . do. The at least one extension is arranged to extend outside the width of the housing when the launch portion protrudes toward the upper surface of the housing.

The second rubber band 270 connects a pair of third holes 250 and 260 and a pair of fourth holes 411 , 412 , 421 , 422 included in at least one extension part, and the launch part is the upper surface of the housing. It can have the shortest length when protruding to According to various embodiments, the second rubber band 270 may connect only the fourth holes included in a specific partial extension of the at least one extension. For example, the second rubber band 270 connects the pair of third holes 250 and 260 and the pair of fourth holes 411 and 412 included in the first extension 410, and the second The pair of fourth holes 421 and 422 included in the extension 420 may not be connected. In this case, the elastic launch device may further include a third rubber band connecting the pair of third holes 250 and 260 and the pair of fourth holes 421 and 422 included in the second extension 420 . can

9 is a view showing a state in which the launch unit is accommodated in the housing in the elastic launch device including the extension, according to the present invention.

Referring to FIG. 9 , as shown in FIG. 8 , the extension part may be disposed from a state extending outside the width of the housing to a state that can be accommodated in the housing when the launch part and the at least one extension part are accommodated in the housing. have. Accordingly, the second rubber band 270 may be stretched compared to the state of FIG. 8 .

When the user separates the fixing part from the housing and the elastic launch device transitions from the state of FIG. 9 to the state of FIG. 8, the launch part protrudes to the upper surface of the housing by the elasticity of the first rubber band, and at the same time, the elasticity of the second rubber band , the at least one extension may extend outside the width of the housing.

The elastic launch device according to an embodiment of the disclosed technology has been described with reference to the embodiment shown in the drawings for better understanding, but this is merely exemplary, and those of ordinary skill in the art can make various modifications and equivalents therefrom. It will be appreciated that other embodiments are possible. Accordingly, the true technical protection scope of the disclosed technology should be defined by the appended claims.

110: housing
120: first fixing hole
130: support
135: first stopper
140: housing first surface
145: housing second side
146: first adhesive part
147: second adhesive part
150, 160: first hole
200: launch unit
201: first side of the launch unit
202: second side of the launch unit
203: second stopper
210, 220: second hole
230: first rubber band
240: second fixing hole
250, 260: 3rd hole
270: second rubber band
300: fixed part
410: first extension
420: second extension
411, 412, 421, 422: 4th hole

Claims (5)

a housing having a space formed inside the body;
a launch unit for storing confetti;
a first rubber band for firing the firing unit; and
and a fixing part detachable from the housing,
A first fixing hole is provided on the outer surface of the housing,
In the space, one outer surface of the housing extends into the space and is formed by folding, and a support part having a pair of first holes is provided;
The launch unit is provided with a second fixing hole,
A pair of second holes is provided at the lower end of the launch unit,
The first rubber band connects the pair of first holes and the pair of second holes,
When the firing part is accommodated in the housing, the first rubber band is stretched,
The firing part is fixed in a state accommodated in the housing as the fixing part is fitted into the first fixing hole and the second fixing hole in a state in which the first rubber band is stretched,
The launch unit is configured to eject the confetti while protruding from the upper surface of the housing according to the elasticity of the first rubber band when the fixing unit is separated from the housing. According to claim 1,
The housing includes a first locking part formed by extending one outer surface of the housing or the support part and folding it into the space,
The firing unit includes a second locking unit,
The first locking part and the second locking part are configured to brake the firing part protruding from the upper surface of the housing by the second locking part being caught by the first locking part after the fixing part is separated from the housing , elastic launch device. According to claim 1,
The elastic launch device further comprises at least one extension and a second elastic band,
The launch unit further comprises a pair of third holes,
Each of the at least one extension includes a pair of fourth holes,
The at least one extension part is arranged to extend outside the width of the housing when the launch part protrudes toward the upper surface of the housing,
The second rubber band connects at least one pair of fourth holes among the pair of third holes and the pair of fourth holes included in the at least one extension,
When the firing part and the at least one extension part are accommodated in the housing, the second rubber band is stretched,
When the launch part protrudes from the upper surface of the housing, the at least one extension part extends outside the width of the housing by the elasticity of the second rubber band. According to claim 1,
The launch unit has a structure in which the first surface and the second surface are superimposed,
The launch unit includes an envelope positioned between the first surface and the second surface and having an open top surface,
The launch unit further comprises a guide paper positioned within the envelope and extending over the upper surface of the housing. According to claim 1,
The area of the lower end of the second fixing hole of the firing unit has a different color from the area corresponding to the position of the first fixing hole among the third surface which is one of both sides of the inner surface of the housing and the support part,
The third surface is a surface exposed to the outside of the housing through the first fixing hole in a state in which the launch part protrudes from the upper surface of the housing, the elastic launch device.

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