Swingline 74030 manual hole punch handle is locked down

Question edited for clarity.
Question moved from Cars and Trucks to model category.

Unfortunately, it looks like a one-off special. I would have thought it would bed a standard figure 8 two pin plug into the stapler

https://www.ebay.com/itm/374765877705

Contact Swingline direct via this link

https://www.google.com/search?q=swingline+535+electric+3+hole+punch+power+cord+replacement

..

Here is the manual.

https://www.manuals.ca/rexel/optima-70/manual

and a link to Swingline for repair under warranty.

Swingline Optima 70 Desk Stapler, Reduced Effort, 70 ...

https://www.swingline.com > staplers > optima-70-desk-...
Shaped ergonomically with a soft handle, the Optima 70 requires less effort to use in comparison to traditional, mid-capacity desktop staplers · Jam Free ...
Rating: 1.7 · ‎6 reviews · ‎US$47.00 · ‎In stock

Unlikely you can. Contact them direct.

Contact Us ' Swingline

www.swingline.com > contact-us

Desktop Staplers · Electric Staplers · Heavy Duty & Specialty · Mini Staplers · Stapling Accessories · Punches · Manual Punches · Electric Punches · Heavy Duty ...

There may be a latch that has been inadvertently engaged.

this can be caused by excess paper stuck in the punch area. clean out all the excess paper, making sure to pay attention to the punch area. gently try to move the handle, it may take several tries to get the handle to move freely, make sure you clean out all excess paper before you use again.

Remove the starter housing from the top of the motor and see if the spring broke or back wound it's self when the rope broke. If all is well remove the rest of the rope from the spool by feeding it back thru the guide hole the handle rests on. Wind it out and find a hole drilled thru the spool and put a punch thru it to lock the spool in place against the spring pressure. Remove the old cord. If it has a steel hook glued to the anchor end you will need a real mercury part. If it has a knot. your in luck.

Take your new cord and burn one end and roll the cord to a point while it is still molten. Tie your knot and heat it till it is cooked so it won't untie itself. Feed the pointy end thru the spool and out the front of the housing. Tie a knot it it where the handle would go. Gently feed the rope on to the spool when you remove the punch.

You will have more rope than the spring could wind. so untie the end knot and feed it back to the spool and put the cord in the notch of the spool so it won't rub on the housing and wind a few more turns into the spring .

When it has enough pressure to completely wind the cord up. put the punch back in the lock hole and feed the cord out the hole thru the handle and knot it, then cook that knot as well.

can't get center puncher to punch

In that case you can just remove the resistor and check its value with an ohmmeter or digital multimeter.
http://en.wikipedia.org/wiki/Ohmmeter
http://en.wikipedia.org/wiki/Multimeter

It has a safety switch. This switch turns machine on when it detects paper and off if it doesn't. Something wrong with sensor. Broken, paper stuck under it, out of position. Will have to open it up and check the sensor. ***Always remember to unplug any equipment before working on it***